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WO2013145844A1 - Heat source system, device for controlling same, and method for controlling same - Google Patents

Heat source system, device for controlling same, and method for controlling same Download PDF

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Publication number
WO2013145844A1
WO2013145844A1 PCT/JP2013/052153 JP2013052153W WO2013145844A1 WO 2013145844 A1 WO2013145844 A1 WO 2013145844A1 JP 2013052153 W JP2013052153 W JP 2013052153W WO 2013145844 A1 WO2013145844 A1 WO 2013145844A1
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WO
WIPO (PCT)
Prior art keywords
heat source
power consumption
power
demand
source system
Prior art date
Application number
PCT/JP2013/052153
Other languages
French (fr)
Japanese (ja)
Inventor
智 二階堂
上田　憲治
和島　一喜
長谷川　泰士
良枝 栂野
Original Assignee
三菱重工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱重工業株式会社 filed Critical 三菱重工業株式会社
Priority to CN201380010891.2A priority Critical patent/CN104126098A/en
Priority to DE112013001841.1T priority patent/DE112013001841T5/en
Priority to US14/376,594 priority patent/US20140374497A1/en
Priority to KR1020147020839A priority patent/KR20140108576A/en
Publication of WO2013145844A1 publication Critical patent/WO2013145844A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/18—Hot-water central heating systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/76—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by means responsive to temperature, e.g. bimetal springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/16—Waste heat
    • F24D2200/22—Ventilation air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/60—Energy consumption
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/13—Economisers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/05—Cost reduction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/021—Inverters therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12—Hot water central heating systems using heat pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention relates to a heat source system, a control device therefor, a control method therefor, a power adjustment network system, and a heat source machine control device.
  • Patent Document 1 in the demand control of a plurality of outdoor units connected to the same power line, when the current value of the power line exceeds the current limit value, the operating frequency of the compressor of one outdoor unit A method for lowering is disclosed.
  • the present invention provides a heat source system and its control device, its control method, power adjustment network system, and heat source device control device capable of suppressing the power consumption of the system to be equal to or lower than contract power when a refrigerator is used as a heat source.
  • the purpose is to provide.
  • a first aspect of the present invention is a control device applied to a heat source system including at least one heat source unit that heats or cools heat source water according to a set temperature and supplies the heated or cooled heat source water to a load device.
  • the power monitoring means for monitoring the power consumption of the heat source system, and when the power consumption of the heat source system exceeds a first power threshold set to a value lower than contract power,
  • a control device for a heat source system comprising demand limiting means for limiting demand by increasing or decreasing the set temperature in a direction in which power consumption decreases.
  • the set temperature is set in a direction in which the power consumption of the heat source machine is reduced by the demand limiting unit. Raised or lowered.
  • the necessary refrigeration capacity is also reduced by reducing the difference between the inflow temperature of the heat source water and the water supply temperature. As a result, the power consumption of the heat source device can be suppressed.
  • the heat source device is originally controlled based on the refrigerating capacity (heat source water outlet temperature of the heat source device), the device control is smoothly performed by controlling the set temperature of the heat source water as described above. Can be done.
  • the demand limiting unit is configured such that when the power consumption of the heat source system becomes less than the second power threshold set to be equal to or lower than the first power threshold, the power consumption of the heat source machine
  • the set temperature may be decreased or increased in a direction in which the temperature increases, and when the current set temperature reaches a preset reference set temperature, the set temperature may be maintained.
  • the set temperature decreases or decreases in the direction in which the power consumption of the heat source unit increases. Raised. Thereby, the temperature of the heat source water can be brought close to the reference set temperature.
  • the demand limiting unit is configured to set the set temperature so that the set temperature does not become less than a preset lower limit value.
  • the set temperature may be raised so that the set temperature does not exceed a preset upper limit value.
  • the control device of the heat source system may include demand limit stop means for stopping demand limit by the demand limit means.
  • the demand restriction when it is not desired to implement the demand restriction, the demand restriction can be stopped by operating the demand restriction stopping means.
  • the control device of the heat source system includes an electric water supply unit that adjusts the flow rate of the heat source water sent from the external device to the heat source unit, and the demand limiting unit is configured such that the power consumption of the heat source system is the first power threshold value. It is good also as hold
  • the demand limiting means holds the rotation speed of the water supply means, so that the rotation speed of the water supply means increases. It becomes possible to prevent an increase in power consumption.
  • the demand limiting unit is configured to set a third power threshold that is set such that power consumption of the heat source system is higher than the first power threshold and lower than the contract power. When it exceeds, it is good also as stopping the operation
  • the power consumption of the heat source system exceeds the third power threshold, the operation of the predetermined heat source machine is stopped, so before the power consumption of the heat source system exceeds the contract power, The power consumption of the heat source system can be quickly reduced.
  • the demand limiting unit performs control to reduce power consumption of the electric device included in the load device during a period in which power consumption of the heat source system exceeds the first power threshold. It is good.
  • the power consumption of the electric device included in the load device is reduced by the demand control means. Can be further reduced.
  • the control device of the heat source system includes power predicting means for predicting future power consumption from the behavior of power consumption of the heat source system in a predetermined period in the past, and the demand limiting means has a predicted power consumption after a predetermined period from the present time.
  • the demand limitation may be started when the first power threshold is exceeded.
  • the future power output is predicted from the power consumption behavior of the heat source system in the past predetermined period by the power prediction means.
  • the demand limiting means limits the demand when the predicted power consumption after a predetermined period from the present time exceeds the first power threshold. Thereby, demand restriction can be performed in advance, and it is possible to prevent the power consumption of the heat source system from reaching the contract power.
  • a second aspect of the present invention is a control method applied to a heat source system including at least one heat source unit that heats or cools heat source water according to a set temperature and supplies the heated or cooled heat source water to a load device.
  • the power consumption of the heat source system is monitored, and when the power consumption of the heat source system exceeds a first power threshold set to a value lower than the contract power, the power consumption of the heat source machine decreases.
  • This is a control method of a heat source system that performs demand limitation by increasing or decreasing the set temperature in the direction to be performed.
  • a third aspect of the present invention is a heat source system including the control device for the heat source system.
  • a heat source system comprising at least one heat source unit that heats or cools the heat source water according to a set temperature and supplies the heated or cooled heat source water to a load device
  • the heat source system comprising: A heat source machine control means for controlling the corresponding heat source machine, and a system control means for giving a control command to each of the heat source machine control means, the system control means comprising: Power monitoring means for monitoring power consumption of the heat source system, and when the power consumption of the heat source system exceeds a first power threshold set to a value lower than contract power, demand restriction is imposed on each of the heat source device control means.
  • a notification means for notifying a start command wherein the heat source machine control means increases the set temperature in a direction in which power consumption decreases when the demand limit start command is notified.
  • the other is a heat source system comprising demand limit means for performing a demand limit by lowering.
  • a fifth aspect of the present invention includes the plurality of heat source systems and a central monitoring device connected to a control device of each of the heat source systems via a communication medium, and the control device of each of the heat source systems from the central control device. Is a power adjustment network system in which the first power threshold is notified.
  • a control device for a heat source unit that heats or cools the heat source water in accordance with a set temperature and supplies the heated or cooled heat source water to a load device, wherein the power consumption of the heat source unit is reduced.
  • the power monitoring means for monitoring and the power consumption of the heat source unit exceed a first power threshold set to a value lower than the contract power
  • the set temperature is set in a direction in which the power consumption of the heat source unit decreases.
  • It is a control device of a heat source machine comprising demand limiting means for limiting demand by raising or lowering.
  • FIG. 1 is a diagram schematically showing the configuration of a heat source system 1 according to the first embodiment of the present invention.
  • the heat source system 1 includes a load device 3, heat source devices 2 a, 2 b, 2 c, and a system control device 20.
  • FIG. 1 illustrates the case where three heat source units are installed, the number of installed heat source units can be arbitrarily determined.
  • the load device 3 is, for example, an air conditioning facility, a hot water supply facility, a factory facility, or the like.
  • the heat source devices 2a, 2b, and 2c cool or heat the heat source water based on the set temperature set by the system control device 20, and supply the heat source water after cooling or after heating to the load device 3.
  • the heat source water may be a liquid medium other than water.
  • an air conditioning facility that performs a cooling operation is assumed as the load device 3, the water that is the heat source water is cooled in the heat source devices 2 a, 2 b, and 2 c, and the cooled cold water is used as the load device 3.
  • the case of supplying to will be described as an example.
  • Cold water pumps (water supply means) 4a, 4b, and 4c for pumping the heat source water are installed on the upstream side of the heat source devices 2a, 2b, and 2c as viewed from the cold water flow.
  • the cold water from the return header 6 is sent to the heat source devices 2a, 2b, and 2c.
  • Each of the chilled water pumps 4a, 4b, and 4c is driven by an inverter motor (not shown), and thereby the variable flow rate is controlled by making the rotation speed variable.
  • the cold water collected in the supply header 5 is supplied to the load device 3.
  • the cold water that has been subjected to air conditioning by the load device 3 and raised in temperature is sent to the return header 6.
  • the cold water is branched at the return header 6 and sent to the heat source units 2a, 2b, and 2c.
  • a bypass pipe 7 is provided between the supply header 5 and the return header 6.
  • the amount of cold water supplied to the load device 3 can be adjusted by adjusting the opening degree of the bypass valve 8 provided in the bypass pipe 7.
  • FIG. 2 shows a schematic configuration when a turbo refrigerator is applied as a configuration example of the heat source units 2a, 2b, and 2c.
  • the heat source units 2a, 2b, and 2c may be unified with the same type of heat source unit, or several types of heat source units may be mixed.
  • the heat source unit 2a includes a turbo compressor 31 that compresses the refrigerant, a condenser 32 that condenses the high-temperature and high-pressure gas refrigerant compressed by the turbo compressor 31, and a liquid refrigerant condensed by the condenser 32.
  • a subcooler 33 that provides cooling, a high-pressure expansion valve 34 that expands liquid refrigerant from the subcooler 33, and an intermediate cooler that is connected to the high-pressure expansion valve 34 and to the intermediate stage of the turbo compressor 31 and the low-pressure expansion valve 35.
  • 37 and an evaporator 36 for evaporating the liquid refrigerant expanded by the low-pressure expansion valve 35.
  • the turbo compressor 31 is a centrifugal two-stage compressor, and is driven by an electric motor 39 whose rotational speed is controlled by an inverter 38.
  • the output of the inverter 38 is controlled by the heat source machine control device 10a.
  • the turbo compressor 31 may be a fixed speed compressor having a constant rotation speed.
  • An inlet guide vane (hereinafter referred to as “IGV”) 40 for controlling the flow rate of the intake refrigerant is provided at the refrigerant intake port of the turbo compressor 31 so that the capacity of the heat source unit 2a can be controlled.
  • the condenser 32 is provided with a pressure sensor 51 for measuring the condensed refrigerant pressure Pc.
  • the output of the pressure sensor 51 is transmitted to the heat source machine control device 10a.
  • the subcooler 33 is provided on the downstream side of the refrigerant flow of the condenser 32 so as to supercool the condensed refrigerant.
  • a temperature sensor 52 for measuring the refrigerant temperature Ts after supercooling is provided.
  • the condenser 32 and the subcooler 33 are inserted with a cooling heat transfer tube 41 for cooling them.
  • the cooling water flow rate F2 is measured by a flow meter 54, the cooling water outlet temperature Tcout is measured by a temperature sensor 55, and the cooling water inlet temperature Tcin is measured by a temperature sensor 56.
  • the cooling water is led to the condenser 32 and the subcooler 33 again after being exhausted to the outside in a cooling tower (not shown).
  • the intermediate cooler 37 is provided with a pressure sensor 57 for measuring the intermediate pressure Pm.
  • the evaporator 36 is provided with a pressure sensor 58 for measuring the evaporation pressure Pe.
  • Cold water having a rated temperature (for example, 7 ° C.) is obtained by absorbing heat in the evaporator 36.
  • the evaporator 36 is inserted with a cold water heat transfer tube 42 for cooling the cold water supplied to the external load 3 (see FIG. 1).
  • the cold water flow rate F1 is measured by a flow meter 59, the cold water outlet temperature Tout is measured by a temperature sensor 60, and the cold water inlet temperature Tin is measured by a temperature sensor 61.
  • a hot gas bypass pipe 43 is provided between the vapor phase portion of the condenser 32 and the vapor phase portion of the evaporator 36.
  • a hot gas bypass valve 44 for controlling the flow rate of the refrigerant flowing in the hot gas bypass pipe 43 is provided. By adjusting the hot gas bypass flow rate by the hot gas bypass valve 44, it is possible to control the capacity of a very small region that is not sufficiently controlled by the IGV 40.
  • the condenser 32 and the subcooler 33 are provided and heat is exchanged between the cooling water cooled by exhausting heat to the outside in the cooling tower and the refrigerant is described.
  • an air heat exchanger may be arranged instead of the condenser 32 and the subcooler 33, and heat may be exchanged between the outside air and the refrigerant in the air heat exchanger.
  • FIG. 3 is a diagram schematically showing the configuration of the control system of the heat source system 1 shown in FIG.
  • the heat source device control devices 10a, 10b, and 10c which are control devices for the heat source devices 2a, 2b, and 2c, are connected to the system control device 20 via the communication medium 21, and are bidirectional. Communication is possible.
  • the system control device 20 is a control device that controls the entire heat source system.
  • the system control device 20 is a demand limiting function that restricts demand so that the power consumption of the entire system does not exceed the contract power, and the heat source that is activated for the required load of the load device 3. It has a unit control function for controlling the number of units 2a, 2b, and 2c.
  • the system control device 20 and the heat source device control devices 10a, 10b, and 10c are computers, for example, a main storage device such as a CPU (Central Processing Unit), a RAM (Random Access Memory), an auxiliary storage device, and an external device.
  • a communication device that exchanges information by performing communication is provided.
  • the auxiliary storage device is a computer-readable recording medium, such as a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, or a semiconductor memory.
  • Various programs are stored in the auxiliary storage device, and various processes are realized by the CPU reading and executing the program from the auxiliary storage device to the main storage device.
  • FIG. 4 is a functional block diagram showing main elements related to the demand limiting function among the functions provided in the system control apparatus 20.
  • the system control device 20 includes a storage unit 22, a power monitoring unit 23, and a demand limiting unit 24 as main components.
  • the storage unit 22 stores a first power threshold set to a value lower than the contract power, a second power threshold set to a value lower than the first power threshold, and a reference set temperature (for example, 5 ° C.). .
  • the reference set temperature is a set temperature that serves as a reference for the cold water supply temperature supplied from the heat source devices 2a, 2b, and 2c to the load device 3.
  • the power monitoring unit 23 monitors the power consumption of the heat source system (hereinafter referred to as “system power consumption”). For example, the system power consumption is monitored by attaching a multimeter to the main power supply system of the heat source system and inputting the measured value to the system controller 20.
  • the demand restriction unit 24 performs demand restriction so that the system power consumption monitored by the power monitoring unit 23 does not exceed the contract power. For example, when the system power consumption exceeds the first power threshold stored in the storage unit 22, the demand restriction unit 24 performs demand restriction by increasing the set temperature of the water supply temperature. As described above, when the system power consumption exceeds the first power threshold, the set temperature, which is the target value of the water supply temperature, is changed in a direction in which the power consumption decreases. Thereby, the head differential pressure
  • the demand restriction unit 24 lowers the set temperature when the system power consumption becomes less than the second power threshold stored in the storage unit 22. Thereby, the water supply temperature of the cold water supplied to the load apparatus 3 can be brought close to the reference set temperature.
  • demand limitation of the heat source system 1 when the system power consumption exceeds the first power threshold at time t1 in FIG. 5, the demand control unit 24 of the system control device 20 increases the set temperature at a predetermined rate.
  • the changed set temperature is transmitted from the system control device 20 to the heat source device control devices 10a, 10b, and 10c, and the heat source devices 2a, 2b, and 2c are controlled based on the changed set temperature.
  • the system power consumption gradually decreases (see time t1 to time t2 in FIG. 5).
  • the demand control unit 24 of the system control device 20 decreases the set temperature at a predetermined rate.
  • the changed set temperature is transmitted from the system control device 20 to each heat source device control device 2a, 2b, 2c, and each heat source device 2a, 2b, 2c is controlled based on the changed set temperature.
  • the demand control unit 24 of the system control device 20 Increases the set temperature at a predetermined rate.
  • the system power consumption gradually decreases, and when it becomes less than the second power threshold at time t4, the demand control unit 24 of the system control device 20 decreases the set temperature at a predetermined rate.
  • the set temperature reaches the reference set temperature, the reference set temperature is maintained.
  • the set temperature is gradually increased and decreased at a predetermined rate, but the method for increasing and decreasing the set temperature is not limited to this example. For example, it may be gradually raised and lowered step by step.
  • FIG. 5 illustrates the case where the first power threshold and the second power threshold are set to different values, but the first power threshold and the second power threshold are set to the same value. Also good.
  • the system power consumption is monitored, and when the system power consumption exceeds the first power threshold, Increase the set temperature of cold water.
  • voltage of the compressor in each heat source machine can be made small, and the power consumption of a heat source machine can be suppressed.
  • the system power consumption can be reduced, and the system power consumption can be prevented from exceeding the contract power.
  • the power consumption of the heat source unit is effectively reduced. It can be reduced.
  • the load-power consumption characteristic at is a curve indicated by a thin line.
  • the operating point is changed because the head differential pressure of the compressor decreases.
  • the load-power consumption characteristic is a curve indicated by a thick line. That is, by reducing the head differential pressure, it is possible to move the load-power consumption characteristic in a direction in which the power consumption decreases.
  • the load factor when the set temperature is increased from 5 ° C. to 7 ° C., the load factor also changes. That is, when the set temperature (cold water outlet temperature) is changed to 7 ° C. when the load factor is 100% and the cold water outlet temperature is 5 ° C., the load factor decreases from 100% to 60%. Thereby, as shown in FIG. 6, power consumption can be further reduced. In this way, by changing the set temperature of the cold water, both the power consumption reduction effect due to the compressor head differential pressure and the power consumption reduction effect due to the load factor reduction can be obtained, effectively reducing the power consumption. Can be reduced.
  • the demand limiting unit 24 decreases the set temperature when the system power consumption exceeds the first power threshold, and increases the set temperature when the system power consumption is less than the second power threshold.
  • a demand limit stop unit 25 for stopping the demand limit may be provided, and the demand limit may not be performed when the demand limit stop unit 25 is operating.
  • the demand restriction stop and stop cancellation by the demand restriction stop unit 25 may be set based on, for example, input information input from an operator.
  • the system control device 20 performs the demand restriction by increasing the set temperature of the cold water.
  • the load device 3 may have a shortage of heat.
  • the shortage of heat may be resolved by increasing the cold water flow rate.
  • the rotation speed of the chilled water pump is held during a period when the demand is limited, and an increase in power consumption in the chilled water pump is avoided.
  • the demand control unit of the system control device 20 issues a frequency command for the chilled water pump in a period in which the system power consumption exceeds the first power threshold and is less than the second power threshold. Hold.
  • the demand control unit of the system control device 20 issues a frequency command for the chilled water pump in a period in which the system power consumption exceeds the first power threshold and is less than the second power threshold. Hold.
  • the demand control unit 24 may restart the heat source machine that has been forcibly stopped when the system power consumption becomes less than the second power threshold.
  • the demand limiting unit 24 of the system control device 20 performs the demand according to any of the first to third embodiments described above. It differs from the heat source system which concerns on each above-mentioned embodiment by the point which performs control which reduces the motive power of the various electric equipment (illustration omitted) with which the load apparatus 3 is provided while restrict
  • the load device 3 is an air conditioner
  • the amount of air blown indoors is made variable by changing the rotational speed of the fan.
  • the demand control part 24 reduces the frequency of the electric equipment in the load apparatus 3 while changing the preset temperature in a heat source machine. To further reduce system power consumption. Thereby, system power consumption can be reduced rapidly and possibility that system power consumption will exceed contract power can be reduced.
  • the power prediction unit 26 is provided in the system control device. As shown in FIG. 11, the power prediction unit 26 predicts future power consumption from the behavior of power consumption of the heat source system in the past predetermined period T1 from the present time.
  • the demand restriction unit 24 starts demand restriction when the predicted power consumption after a predetermined period T2 from the present time exceeds the first power threshold.
  • the predetermined period T1 is a period that can be arbitrarily determined, and is set to about 30 minutes to 1 hour, for example.
  • the predetermined period T2 is set to a time longer than at least a time delay from when the demand restriction is started until the system power consumption starts to decrease.
  • the future system power consumption is predicted from the behavior of the past system power consumption, and it is determined whether to start demand restriction based on the predicted system power consumption. It is possible to effectively avoid exceeding.
  • a known prediction technique can be adopted, and for example, future power is predicted from the rate of change of system power consumption in a past fixed period.
  • the system controller 20 controls the demand of each heat source unit in an integrated manner.
  • a demand limiting function is provided for each heat source unit controller 10a, 10b, 10c. It is also possible to limit demand on a heat source unit basis.
  • the first power threshold, the second power threshold, and the like as described above are set based on, for example, the limit power of each heat source unit that is apportioned from the contract power of the entire system, and the consumption of each heat source unit.
  • the demand restriction as described above is performed based on the relationship between the power, the first power threshold, and the second power threshold.
  • the power consumption of each heat source device can be detected by attaching a multimeter to the power supply system of each heat source device. Thus, it becomes possible to suppress power consumption also by providing the demand limiting function provided in the system control device 20 in each heat source device control device.
  • power consumption may be monitored in the system control device 20. That is, the system control device 20 monitors the system power consumption, and when the system power consumption exceeds the first power threshold, notifies each heat source device control device of a demand restriction start command for starting demand restriction. It is also good. As described above, the system control device 20 may compare each threshold value with the system power consumption, and may notify the heat source device control device of the comparison result to perform demand restriction. When the demand restriction is performed for each heat source unit, the change rate of the set temperature may be different between the heat source units.
  • the power adjustment network system includes system control devices 20a, 20b, and 20c for a plurality of heat source systems according to any of the above-described embodiments, and a system control device 20a for each heat source system. , 20b, 20c and a central monitoring device 50 connected via a communication medium 51.
  • the central monitoring device 50 acquires the respective system power consumption and the like from the system control devices 20a, 20b, and 20c of each heat source system, determines the first power threshold based on these information and the contract power, and this first The power threshold value is transmitted to each system control device 20.
  • the central monitoring device 50 has a heat source system in which the demand limit is performed or the demand limit is likely to start, and there is a margin before the demand limit is started, in other words, the system power consumption and the first power threshold value.
  • the first power threshold value of the former heat source system is increased and the first power threshold value of the latter heat source system is decreased. In this way, by adjusting the first power threshold value of each heat source system by comparing the system power consumption between the heat source systems, flexible power adjustment can be performed.

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Abstract

The purpose of the present invention is to limit the power consumption of a system to be equal to or less than contracted power in the case where a refrigerating device is used as a heat source. A system control device (20) is provided with: a power monitoring unit (23) that monitors the power consumption of a heat source system; and a demand restricting unit (24). If the power consumption of the heat source system exceeds a first power threshold value that is set to a value lower than contracted power, the demand restricting unit (24) restricts demand by raising or lowering a set temperature in the direction in which the power consumption of a heat source machine decreases.

Description

熱源システム及びその制御装置並びにその制御方法Heat source system, control device therefor, and control method therefor
　本発明は、熱源システム及びその制御装置並びにその制御方法、電力調整ネットワークシステム、及び熱源機の制御装置に関するものである。 The present invention relates to a heat source system, a control device therefor, a control method therefor, a power adjustment network system, and a heat source machine control device.
　従来、空調システムにおいて、消費電力が電力会社との契約電力を超えないように、デマンド制御を行うことが提案されている。
　例えば、特許文献１には、同一電源ラインに接続された複数の室外機のデマンド制御において、電源ラインの電流値が電流制限値を超えた場合に、１台の室外機の圧縮機の運転周波数を低下させる方法が開示されている。 Conventionally, in an air conditioning system, it has been proposed to perform demand control so that power consumption does not exceed contract power with a power company.
For example, in Patent Document 1, in the demand control of a plurality of outdoor units connected to the same power line, when the current value of the power line exceeds the current limit value, the operating frequency of the compressor of one outdoor unit A method for lowering is disclosed.
特開平１０－３３９５２９号公報JP-A-10-339529
　近年、ビルなどに導入される大型の空調設備として、ターボ冷凍機を熱源として用いるものが知られている。このように熱源としてターボ冷凍機等を用いる大型の空調設備においても、システム全体として契約電力が締結される場合があり、システムの消費電力が契約電力を超えないように制御することが必要とされる。 In recent years, as a large-scale air-conditioning equipment introduced in a building or the like, one using a turbo refrigerator as a heat source is known. Thus, even in a large-scale air conditioning facility using a turbo chiller or the like as a heat source, contract power may be concluded as a whole system, and it is necessary to control the system power consumption so as not to exceed the contract power. The
　本発明は、冷凍機を熱源として用いる場合において、システムの消費電力を契約電力以下に抑制することのできる熱源システム及びその制御装置並びにその制御方法、電力調整ネットワークシステム、及び熱源機の制御装置を提供することを目的とする。 The present invention provides a heat source system and its control device, its control method, power adjustment network system, and heat source device control device capable of suppressing the power consumption of the system to be equal to or lower than contract power when a refrigerator is used as a heat source. The purpose is to provide.
　本発明の第１態様は、設定温度に従って熱源水の加熱または冷却を行い、加熱後または冷却後の熱源水を負荷装置へ供給する少なくとも１台の熱源機を備える熱源システムに適用される制御装置であって、前記熱源システムの消費電力をモニタする電力監視手段と、前記熱源システムの消費電力が、契約電力よりも低い値に設定された第１電力閾値を超えた場合に、前記熱源機の消費電力が低下する方向に前記設定温度を上昇または下降させることによりデマンド制限を行うデマンド制限手段とを具備する熱源システムの制御装置である。 A first aspect of the present invention is a control device applied to a heat source system including at least one heat source unit that heats or cools heat source water according to a set temperature and supplies the heated or cooled heat source water to a load device. The power monitoring means for monitoring the power consumption of the heat source system, and when the power consumption of the heat source system exceeds a first power threshold set to a value lower than contract power, A control device for a heat source system, comprising demand limiting means for limiting demand by increasing or decreasing the set temperature in a direction in which power consumption decreases.
　本態様によれば、熱源システムの消費電力が契約電力よりも低い値に設定された第１電力閾値を超えた場合に、デマンド制限手段によって、熱源機の消費電力が低下する方向に設定温度が上昇または下降させられる。これにより、熱源機の冷却水出口温度と熱源水送水温度との温度差（=蒸発器と凝縮機の冷媒圧力差）が小さくなり、圧縮機のヘッド差圧を小さくすることができる。更に、熱源水の流入温度と送水温度の差が小さくなる事で必要冷凍能力も減少する。この結果、熱源機の消費電力を抑制することができる。また、熱源機は、本来、冷凍能力（熱源機の熱源水出口温度）に基づいて制御されていることから、上記のように、熱源水の設定温度を制御することにより、機器制御を円滑に行うことが可能となる。 According to this aspect, when the power consumption of the heat source system exceeds the first power threshold set to a value lower than the contract power, the set temperature is set in a direction in which the power consumption of the heat source machine is reduced by the demand limiting unit. Raised or lowered. Thereby, the temperature difference (= refrigerant pressure difference of an evaporator and a condenser) between the cooling water outlet temperature of a heat source machine and a heat source water feed water temperature becomes small, and the head differential pressure of a compressor can be made small. Furthermore, the necessary refrigeration capacity is also reduced by reducing the difference between the inflow temperature of the heat source water and the water supply temperature. As a result, the power consumption of the heat source device can be suppressed. In addition, since the heat source device is originally controlled based on the refrigerating capacity (heat source water outlet temperature of the heat source device), the device control is smoothly performed by controlling the set temperature of the heat source water as described above. Can be done.
　上記熱源システムの制御装置において、前記デマンド制限手段は、前記熱源システムの消費電力が、前記第１電力閾値以下に設定された前記第２電力閾値未満となった場合に、前記熱源機の消費電力が増加する方向に前記設定温度を下降または上昇させ、現在の設定温度が予め設定されている基準設定温度に達した場合にその設定温度を維持することとしてもよい。 In the control device of the heat source system, the demand limiting unit is configured such that when the power consumption of the heat source system becomes less than the second power threshold set to be equal to or lower than the first power threshold, the power consumption of the heat source machine The set temperature may be decreased or increased in a direction in which the temperature increases, and when the current set temperature reaches a preset reference set temperature, the set temperature may be maintained.
　このような構成によれば、熱源システムの消費電力が第１電力閾値以下に設定された第２電力閾値未満になった場合には、熱源機の消費電力が増加する方向に設定温度が下降または上昇させられる。これにより、熱源水の温度を基準設定温度に近づけることが可能となる。 According to such a configuration, when the power consumption of the heat source system becomes less than the second power threshold set to be equal to or lower than the first power threshold, the set temperature decreases or decreases in the direction in which the power consumption of the heat source unit increases. Raised. Thereby, the temperature of the heat source water can be brought close to the reference set temperature.
　上記熱源システムの制御装置において、前記デマンド制限手段は、前記熱源機が前記熱源水の加熱を行っている場合には、前記設定温度が予め設定されている下限値未満とならないように前記設定温度を下降させ、前記熱源機が前記熱源水の冷却を行っている場合には、前記設定温度が予め設定されている上限値を超えないように前記設定温度を上昇させることとしてもよい。 In the control device of the heat source system, when the heat source machine is heating the heat source water, the demand limiting unit is configured to set the set temperature so that the set temperature does not become less than a preset lower limit value. When the heat source device cools the heat source water, the set temperature may be raised so that the set temperature does not exceed a preset upper limit value.
　このような構成によれば、設定温度に制限値を設け、デマンド制限手段によって設定温度が変更される場合に、設定温度が制限値に達した場合には、その制限値を維持するような制御が行われる。これにより、負荷装置へ送出される熱源水温度が制限値を超えることを防止することが可能となる。 According to such a configuration, when a limit value is set for the set temperature and the set temperature is changed by the demand limiting unit, when the set temperature reaches the limit value, control is performed to maintain the limit value. Is done. This makes it possible to prevent the heat source water temperature sent to the load device from exceeding the limit value.
　上記熱源システムの制御装置は、前記デマンド制限手段によるデマンド制限を停止させるデマンド制限停止手段を備えることとしてもよい。 The control device of the heat source system may include demand limit stop means for stopping demand limit by the demand limit means.
　このような構成によれば、デマンド制限を実施したくない場合には、デマンド制限停止手段を作動させることにより、デマンド制限を停止させることができる。 According to such a configuration, when it is not desired to implement the demand restriction, the demand restriction can be stopped by operating the demand restriction stopping means.
　上記熱源システムの制御装置は、前記外部装置から前記熱源機に送られる熱源水の流量を調節する電動の送水手段を備え、前記デマンド制限手段は、前記熱源システムの消費電力が前記第１電力閾値を超えている期間において、前記送水手段の回転数をホールドさせることとしてもよい。 The control device of the heat source system includes an electric water supply unit that adjusts the flow rate of the heat source water sent from the external device to the heat source unit, and the demand limiting unit is configured such that the power consumption of the heat source system is the first power threshold value. It is good also as hold | maintaining the rotation speed of the said water supply means in the period which is over.
　このような構成によれば、熱源システムの消費電力が第１電力閾値を超えている期間において、デマンド制限手段が、送水手段の回転数をホールドさせるので、送水手段の回転数が上昇することによる電力消費増加を防止することが可能となる。 According to such a configuration, in the period when the power consumption of the heat source system exceeds the first power threshold, the demand limiting means holds the rotation speed of the water supply means, so that the rotation speed of the water supply means increases. It becomes possible to prevent an increase in power consumption.
　上記熱源システムの制御装置において、前記デマンド制限手段は、前記熱源システムの消費電力が、前記第１電力閾値よりも高い値であり、前記契約電力よりも低い値に設定された第３電力閾値を超えた場合に、所定の前記熱源機の運転を停止させることとしてもよい。 In the control device of the heat source system, the demand limiting unit is configured to set a third power threshold that is set such that power consumption of the heat source system is higher than the first power threshold and lower than the contract power. When it exceeds, it is good also as stopping the operation | movement of the said predetermined | prescribed heat-source machine.
　このような構成によれば、熱源システムの消費電力が第３電力閾値を超えた場合には、所定の熱源機の運転が停止されるので、熱源システムの消費電力が契約電力を超える前に、熱源システムの消費電力を速やかに低下させることが可能となる。 According to such a configuration, when the power consumption of the heat source system exceeds the third power threshold, the operation of the predetermined heat source machine is stopped, so before the power consumption of the heat source system exceeds the contract power, The power consumption of the heat source system can be quickly reduced.
　上記熱源システムの制御装置において、前記デマンド制限手段は、前記熱源システムの消費電力が前記第１電力閾値を超えている期間において、前記負荷装置が備える電動機器の消費電力を低下させる制御を行うこととしてもよい。 In the control device of the heat source system, the demand limiting unit performs control to reduce power consumption of the electric device included in the load device during a period in which power consumption of the heat source system exceeds the first power threshold. It is good.
　このような構成によれば、熱源システムの消費電力が第１電力閾値を超えている期間において、デマンド制御手段により、負荷装置が備える電動機器の消費電力が低下させられるので、熱源システムの消費電力を更に低下させることが可能となる。 According to such a configuration, during the period when the power consumption of the heat source system exceeds the first power threshold value, the power consumption of the electric device included in the load device is reduced by the demand control means. Can be further reduced.
　上記熱源システムの制御装置は、過去の所定期間における熱源システムの消費電力の挙動から将来の消費電力を予測する電力予測手段を備え、前記デマンド制限手段は、現在から所定期間後における予測消費電力が前記第１電力閾値を超える場合に、前記デマンド制限を開始することとしてもよい。 The control device of the heat source system includes power predicting means for predicting future power consumption from the behavior of power consumption of the heat source system in a predetermined period in the past, and the demand limiting means has a predicted power consumption after a predetermined period from the present time. The demand limitation may be started when the first power threshold is exceeded.
　このような構成によれば、電力予測手段により、過去の所定期間における熱源システムの消費電力の挙動から将来の消費出力が予測される。デマンド制限手段は、現在から所定期間後における予測消費電力が第１電力閾値を超える場合に、デマンド制限を行う。これにより、事前にデマンド制限を行うことができ、熱源システムの消費電力が契約電力に達することを回避することが可能となる。 According to such a configuration, the future power output is predicted from the power consumption behavior of the heat source system in the past predetermined period by the power prediction means. The demand limiting means limits the demand when the predicted power consumption after a predetermined period from the present time exceeds the first power threshold. Thereby, demand restriction can be performed in advance, and it is possible to prevent the power consumption of the heat source system from reaching the contract power.
　本発明の第２態様は、設定温度に従って熱源水の加熱または冷却を行い、加熱後または冷却後の熱源水を負荷装置へ供給する少なくとも１台の熱源機を備える熱源システムに適用される制御方法であって、前記熱源システムの消費電力をモニタし、前記熱源システムの消費電力が、契約電力よりも低い値に設定された第１電力閾値を超えた場合に、前記熱源機の消費電力が低下する方向に前記設定温度を上昇または下降させることによりデマンド制限を行う熱源システムの制御方法である。 A second aspect of the present invention is a control method applied to a heat source system including at least one heat source unit that heats or cools heat source water according to a set temperature and supplies the heated or cooled heat source water to a load device. The power consumption of the heat source system is monitored, and when the power consumption of the heat source system exceeds a first power threshold set to a value lower than the contract power, the power consumption of the heat source machine decreases. This is a control method of a heat source system that performs demand limitation by increasing or decreasing the set temperature in the direction to be performed.
　本発明の第３態様は、上記熱源システムの制御装置を備える熱源システムである。 A third aspect of the present invention is a heat source system including the control device for the heat source system.
　本発明の第４態様は、設定温度に従って熱源水の加熱または冷却を行い、加熱後または冷却後の熱源水を負荷装置へ供給する少なくとも１台の熱源機を備える熱源システムであって、前記熱源機に対応してそれぞれ設けられ、対応する前記熱源機を制御する熱源機制御手段と、各前記熱源機制御手段に対して制御指令を与えるシステム制御手段とを備え、前記システム制御手段は、前記熱源システムの消費電力をモニタする電力監視手段と、前記熱源システムの消費電力が、契約電力よりも低い値に設定された第１電力閾値を超えた場合に、各前記熱源機制御手段にデマンド制限開始指令を通知する通知手段とを備え、前記熱源機制御手段は、前記デマンド制限開始指令が通知された場合に、消費電力が低下する方向に前記設定温度を上昇または下降させることによりデマンド制限を行うデマンド制限手段を備える熱源システムである。 According to a fourth aspect of the present invention, there is provided a heat source system comprising at least one heat source unit that heats or cools the heat source water according to a set temperature and supplies the heated or cooled heat source water to a load device, the heat source system comprising: A heat source machine control means for controlling the corresponding heat source machine, and a system control means for giving a control command to each of the heat source machine control means, the system control means comprising: Power monitoring means for monitoring power consumption of the heat source system, and when the power consumption of the heat source system exceeds a first power threshold set to a value lower than contract power, demand restriction is imposed on each of the heat source device control means. A notification means for notifying a start command, wherein the heat source machine control means increases the set temperature in a direction in which power consumption decreases when the demand limit start command is notified. The other is a heat source system comprising demand limit means for performing a demand limit by lowering.
　本発明の第５態様は、上記複数の熱源システムと、各前記熱源システムの制御装置と通信媒体を介して接続される中央監視装置とを備え、前記中央制御装置から各前記熱源システムの制御装置に対して前記第１電力閾値が通知される電力調整ネットワークシステムである。 A fifth aspect of the present invention includes the plurality of heat source systems and a central monitoring device connected to a control device of each of the heat source systems via a communication medium, and the control device of each of the heat source systems from the central control device. Is a power adjustment network system in which the first power threshold is notified.
　本発明の第６態様は、設定温度に従って熱源水の加熱または冷却を行い、加熱後または冷却後の熱源水を負荷装置へ供給する熱源機の制御装置であって、前記熱源機の消費電力をモニタする電力監視手段と、前記熱源機の消費電力が、契約電力よりも低い値に設定された第１電力閾値を超えた場合に、前記熱源機の消費電力が低下する方向に前記設定温度を上昇または下降させることによりデマンド制限を行うデマンド制限手段とを具備する熱源機の制御装置である。 According to a sixth aspect of the present invention, there is provided a control device for a heat source unit that heats or cools the heat source water in accordance with a set temperature and supplies the heated or cooled heat source water to a load device, wherein the power consumption of the heat source unit is reduced. When the power monitoring means for monitoring and the power consumption of the heat source unit exceed a first power threshold set to a value lower than the contract power, the set temperature is set in a direction in which the power consumption of the heat source unit decreases. It is a control device of a heat source machine comprising demand limiting means for limiting demand by raising or lowering.
　本発明によれば、熱源システムの消費電力が契約電力を超えないように制御することができるという効果を奏する。 According to the present invention, it is possible to control so that the power consumption of the heat source system does not exceed the contract power.
本発明の第１実施形態に係る熱源システムの全体構成を概略的に示した図である。It is the figure which showed roughly the whole structure of the heat-source system which concerns on 1st Embodiment of this invention. 図１に示された熱源機の一構成例を示した図である。It is the figure which showed one structural example of the heat-source equipment shown by FIG. 本発明の第１実施形態に係る熱源システムの制御系の構成を概略的に示した図である。It is the figure which showed roughly the structure of the control system of the heat-source system which concerns on 1st Embodiment of this invention. 図３に示したシステム制御装置が備える機能のうち、熱源機のデマンド制御機能に関する主な要素について示した機能ブロック図である。It is the functional block diagram shown about the main elements regarding the demand control function of a heat source machine among the functions with which the system control apparatus shown in FIG. 3 is provided. 本発明の第１実施形態に係る熱源システムのデマンド制御について説明するための図である。It is a figure for demonstrating the demand control of the heat-source system which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る熱源システムにおける効果を説明するための図である。It is a figure for demonstrating the effect in the heat-source system which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る熱源システムにおけるデマンド制限機能の他の態様を示した図である。It is the figure which showed the other aspect of the demand restriction | limiting function in the heat-source system which concerns on 1st Embodiment of this invention. 本発明の第２実施形態に係る熱源システムのデマンド制限について説明するための図である。It is a figure for demonstrating the demand restriction | limiting of the heat-source system which concerns on 2nd Embodiment of this invention. 本発明の第３実施形態に係る熱源システムのデマンド制限について説明するための図である。It is a figure for demonstrating the demand restriction | limiting of the heat-source system which concerns on 3rd Embodiment of this invention. 本発明の第５実施形態に係るシステム制御装置が備える機能のうち、熱源機のデマンド制御機能に関する主な要素について示した機能ブロック図である。It is the functional block diagram shown about the main elements regarding the demand control function of a heat-source machine among the functions with which the system control apparatus which concerns on 5th Embodiment of this invention is equipped. 図１０の電力予測部により行われる消費電力予測について説明するための図である。It is a figure for demonstrating the power consumption prediction performed by the electric power estimation part of FIG. 本発明の一実施形態に係る電力調整ネットワークシステムの概略構成について説明した図である。It is the figure explaining schematic structure of the power adjustment network system which concerns on one Embodiment of this invention.
〔第１実施形態〕
　以下、本発明の第１実施形態に係る熱源システム及びその制御装置並びにその制御方法について、図面を参照して説明する。
　図１は、本発明の第１実施形態に係る熱源システム１の構成を概略的に示した図である。熱源システム１は、負荷装置３と、熱源機２ａ、２ｂ、２ｃと、システム制御装置２０とを備えている。図１では、３台の熱源機が設置されている場合について例示しているが、熱源機の設置台数については任意に決定することができる。 [First Embodiment]
Hereinafter, a heat source system, a control device thereof, and a control method thereof according to a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram schematically showing the configuration of a heat source system 1 according to the first embodiment of the present invention. The heat source system 1 includes a load device 3, heat source devices 2 a, 2 b, 2 c, and a system control device 20. Although FIG. 1 illustrates the case where three heat source units are installed, the number of installed heat source units can be arbitrarily determined.
　負荷装置３は、例えば、空調設備、給湯設備、工場設備等である。熱源機２ａ、２ｂ、２ｃは、システム制御装置２０によって設定される設定温度に基づいて熱源水を冷却または加熱し、冷却後または加熱後の熱源水を負荷装置３へ供給する。ここで、熱源水は水以外の液媒体であってもよい。
　なお、本実施形態では、説明の便宜上、負荷装置３として冷房運転を行う空調設備を想定し、熱源機２ａ、２ｂ、２ｃにおいて熱源水である水を冷却し、冷却後の冷水を負荷装置３へ供給する場合を例に挙げて説明する。 The load device 3 is, for example, an air conditioning facility, a hot water supply facility, a factory facility, or the like. The heat source devices 2a, 2b, and 2c cool or heat the heat source water based on the set temperature set by the system control device 20, and supply the heat source water after cooling or after heating to the load device 3. Here, the heat source water may be a liquid medium other than water.
In the present embodiment, for convenience of explanation, an air conditioning facility that performs a cooling operation is assumed as the load device 3, the water that is the heat source water is cooled in the heat source devices 2 a, 2 b, and 2 c, and the cooled cold water is used as the load device 3. The case of supplying to will be described as an example.
　冷水流れからみた各熱源機２ａ、２ｂ、２ｃの上流側には、それぞれ、熱源水を圧送する冷水ポンプ（送水手段）４ａ、４ｂ、４ｃが設置されている。これら冷水ポンプ４ａ、４ｂ、４ｃによって、リターンヘッダ６からの冷水が各熱源機２ａ、２ｂ、２ｃへと送られる。各冷水ポンプ４ａ、４ｂ、４ｃは、インバータモータ（図示略）によって駆動されるようになっており、これにより、回転数を可変とすることで可変流量制御される。 Cold water pumps (water supply means) 4a, 4b, and 4c for pumping the heat source water are installed on the upstream side of the heat source devices 2a, 2b, and 2c as viewed from the cold water flow. By these cold water pumps 4a, 4b, and 4c, the cold water from the return header 6 is sent to the heat source devices 2a, 2b, and 2c. Each of the chilled water pumps 4a, 4b, and 4c is driven by an inverter motor (not shown), and thereby the variable flow rate is controlled by making the rotation speed variable.
　サプライヘッダ５には、各熱源機２ａ、２ｂ、２ｃにおいて得られた冷水が集められるようになっている。サプライヘッダ５に集められた冷水は、負荷装置３に供給される。負荷装置３にて空調に供されて昇温した冷水は、リターンヘッダ６に送られる。冷水は、リターンヘッダ６において分岐され、各熱源機２ａ、２ｂ、２ｃに送られる。 Supplied in the supply header 5 is cold water obtained in each of the heat source devices 2a, 2b, 2c. The cold water collected in the supply header 5 is supplied to the load device 3. The cold water that has been subjected to air conditioning by the load device 3 and raised in temperature is sent to the return header 6. The cold water is branched at the return header 6 and sent to the heat source units 2a, 2b, and 2c.
　また、サプライヘッダ５とリターンヘッダ６との間にはバイパス配管７が設けられている。バイパス配管７に設けられたバイパス弁８の開度を調整することにより、負荷装置３へ供給する冷水量を調整することができる。 Further, a bypass pipe 7 is provided between the supply header 5 and the return header 6. The amount of cold water supplied to the load device 3 can be adjusted by adjusting the opening degree of the bypass valve 8 provided in the bypass pipe 7.
　図２には、熱源機２ａ、２ｂ、２ｃの一構成例としてターボ冷凍機を適用した場合の概略構成が示されている。同図では、理解の容易のため、３台並列に設けられた熱源機のうち、一つの熱源機２ａのみが示されている。なお、図２に示した構成は一例であり、例えば、ターボ冷凍機に代えて、スクリュー冷凍機を採用することとしてもよい。また、熱源機２ａ、２ｂ、２ｃは同一種類の熱源機で統一されていてもよいし、数種類の熱源機が混在していてもよい。 FIG. 2 shows a schematic configuration when a turbo refrigerator is applied as a configuration example of the heat source units 2a, 2b, and 2c. In the figure, only one heat source unit 2a is shown among three heat source units provided in parallel for easy understanding. The configuration illustrated in FIG. 2 is an example, and for example, a screw refrigerator may be employed instead of the turbo refrigerator. The heat source units 2a, 2b, and 2c may be unified with the same type of heat source unit, or several types of heat source units may be mixed.
　熱源機２ａは、冷媒を圧縮するターボ圧縮機３１と、ターボ圧縮機３１によって圧縮された高温高圧のガス冷媒を凝縮する凝縮器３２と、凝縮器３２にて凝縮された液冷媒に対して過冷却を与えるサブクーラ３３と、サブクーラ３３からの液冷媒を膨張させる高圧膨張弁３４と、高圧膨張弁３４に接続されるとともにターボ圧縮機３１の中間段および低圧膨張弁３５に接続される中間冷却器３７と、低圧膨張弁３５によって膨張させられた液冷媒を蒸発させる蒸発器３６とを備えている。 The heat source unit 2a includes a turbo compressor 31 that compresses the refrigerant, a condenser 32 that condenses the high-temperature and high-pressure gas refrigerant compressed by the turbo compressor 31, and a liquid refrigerant condensed by the condenser 32. A subcooler 33 that provides cooling, a high-pressure expansion valve 34 that expands liquid refrigerant from the subcooler 33, and an intermediate cooler that is connected to the high-pressure expansion valve 34 and to the intermediate stage of the turbo compressor 31 and the low-pressure expansion valve 35. 37 and an evaporator 36 for evaporating the liquid refrigerant expanded by the low-pressure expansion valve 35.
　ターボ圧縮機３１は、遠心式の２段圧縮機であり、インバータ３８によって回転数制御された電動モータ３９によって駆動されている。インバータ３８は、熱源機制御装置１０ａによってその出力が制御されている。なお、ターボ圧縮機３１は、回転数一定の固定速の圧縮機であってもよい。ターボ圧縮機３１の冷媒吸入口には、吸入冷媒流量を制御するインレットガイドベーン（以下「ＩＧＶ」という。）４０が設けられており、熱源機２ａの容量制御が可能となっている。 The turbo compressor 31 is a centrifugal two-stage compressor, and is driven by an electric motor 39 whose rotational speed is controlled by an inverter 38. The output of the inverter 38 is controlled by the heat source machine control device 10a. The turbo compressor 31 may be a fixed speed compressor having a constant rotation speed. An inlet guide vane (hereinafter referred to as “IGV”) 40 for controlling the flow rate of the intake refrigerant is provided at the refrigerant intake port of the turbo compressor 31 so that the capacity of the heat source unit 2a can be controlled.
　凝縮器３２には、凝縮冷媒圧力Ｐｃを計測するための圧力センサ５１が設けられている。圧力センサ５１の出力は、熱源機制御装置１０ａに送信される。
　サブクーラ３３は、凝縮器３２の冷媒流れ下流側に、凝縮された冷媒に対して過冷却を与えるように設けられている。サブクーラ３３の冷媒流れ下流側直後には、過冷却後の冷媒温度Ｔｓを計測する温度センサ５２が設けられている。
　凝縮器３２及びサブクーラ３３には、これらを冷却するための冷却伝熱管４１が挿通されている。冷却水流量Ｆ２は流量計５４により、冷却水出口温度Ｔｃｏｕｔは温度センサ５５により、冷却水入口温度Ｔｃｉｎは温度センサ５６により計測されるようになっている。冷却水は、図示しない冷却塔において外部へと排熱された後に、再び凝縮器３２及びサブクーラ３３へと導かれるようになっている。 The condenser 32 is provided with a pressure sensor 51 for measuring the condensed refrigerant pressure Pc. The output of the pressure sensor 51 is transmitted to the heat source machine control device 10a.
The subcooler 33 is provided on the downstream side of the refrigerant flow of the condenser 32 so as to supercool the condensed refrigerant. Immediately after the subcooler 33 on the downstream side of the refrigerant flow, a temperature sensor 52 for measuring the refrigerant temperature Ts after supercooling is provided.
The condenser 32 and the subcooler 33 are inserted with a cooling heat transfer tube 41 for cooling them. The cooling water flow rate F2 is measured by a flow meter 54, the cooling water outlet temperature Tcout is measured by a temperature sensor 55, and the cooling water inlet temperature Tcin is measured by a temperature sensor 56. The cooling water is led to the condenser 32 and the subcooler 33 again after being exhausted to the outside in a cooling tower (not shown).
　中間冷却器３７には、中間圧力Ｐｍを計測するための圧力センサ５７が設けられている。蒸発器３６には、蒸発圧力Ｐｅを計測するための圧力センサ５８が設けられている。蒸発器３６において吸熱されることによって定格温度（例えば７℃）の冷水が得られる。蒸発器３６には、外部負荷３（図１参照）へ供給される冷水を冷却するための冷水伝熱管４２が挿通されている。冷水流量Ｆ１は流量計５９により、冷水出口温度Ｔｏｕｔは温度センサ６０により、冷水入口温度Ｔｉｎは温度センサ６１により計測されるようになっている。 The intermediate cooler 37 is provided with a pressure sensor 57 for measuring the intermediate pressure Pm. The evaporator 36 is provided with a pressure sensor 58 for measuring the evaporation pressure Pe. Cold water having a rated temperature (for example, 7 ° C.) is obtained by absorbing heat in the evaporator 36. The evaporator 36 is inserted with a cold water heat transfer tube 42 for cooling the cold water supplied to the external load 3 (see FIG. 1). The cold water flow rate F1 is measured by a flow meter 59, the cold water outlet temperature Tout is measured by a temperature sensor 60, and the cold water inlet temperature Tin is measured by a temperature sensor 61.
　凝縮器３２の気相部と蒸発器３６の気相部との間には、ホットガスバイパス管４３が設けられている。そして、ホットガスバイパス管４３内を流れる冷媒の流量を制御するためのホットガスバイパス弁４４が設けられている。ホットガスバイパス弁４４によってホットガスバイパス流量を調整することにより、ＩＧＶ４０では制御が十分でない非常に小さな領域の容量制御が可能となっている。 A hot gas bypass pipe 43 is provided between the vapor phase portion of the condenser 32 and the vapor phase portion of the evaporator 36. A hot gas bypass valve 44 for controlling the flow rate of the refrigerant flowing in the hot gas bypass pipe 43 is provided. By adjusting the hot gas bypass flow rate by the hot gas bypass valve 44, it is possible to control the capacity of a very small region that is not sufficiently controlled by the IGV 40.
　また、図２に示した熱源機２ａでは、凝縮器３２及びサブクーラ３３を設け、冷却塔において外部へと排熱することにより冷やされた冷却水と冷媒との間で熱交換を行う場合について述べたが、例えば、凝縮器３２及びサブクーラ３３に代えて空気熱交換器を配置し、空気熱交換器において外気と冷媒との間で熱交換を行うような構成としてもよい。 Further, in the heat source apparatus 2a shown in FIG. 2, a case where the condenser 32 and the subcooler 33 are provided and heat is exchanged between the cooling water cooled by exhausting heat to the outside in the cooling tower and the refrigerant is described. However, for example, an air heat exchanger may be arranged instead of the condenser 32 and the subcooler 33, and heat may be exchanged between the outside air and the refrigerant in the air heat exchanger.
　図３は、図１に示した熱源システム１の制御系の構成を概略的に示した図である。図３に示すように、各熱源機２ａ、２ｂ、２ｃの制御装置である熱源機制御装置１０ａ、１０ｂ、１０ｃは、システム制御装置２０と通信媒体２１を介して接続されており、双方向の通信が可能な構成とされている。システム制御装置２０は、熱源システム全体を制御する制御装置であり、システム全体の消費電力が契約電力を超えないようにデマンド制限するデマンド制限機能や、負荷装置３の要求負荷に対して起動させる熱源機２ａ、２ｂ、２ｃの台数制御を行う台数制御機能等を有している。 FIG. 3 is a diagram schematically showing the configuration of the control system of the heat source system 1 shown in FIG. As shown in FIG. 3, the heat source device control devices 10a, 10b, and 10c, which are control devices for the heat source devices 2a, 2b, and 2c, are connected to the system control device 20 via the communication medium 21, and are bidirectional. Communication is possible. The system control device 20 is a control device that controls the entire heat source system. The system control device 20 is a demand limiting function that restricts demand so that the power consumption of the entire system does not exceed the contract power, and the heat source that is activated for the required load of the load device 3. It has a unit control function for controlling the number of units 2a, 2b, and 2c.
　システム制御装置２０、熱源機制御装置１０ａ、１０ｂ、１０ｃは、例えば、コンピュータであり、ＣＰＵ（中央演算処理装置）、ＲＡＭ（Random Access Memory）等の主記憶装置、補助記憶装置、外部の機器と通信を行うことにより情報の授受を行う通信装置などを備えている。
　補助記憶装置は、コンピュータ読取可能な記録媒体であり、例えば、磁気ディスク、光磁気ディスク、ＣＤ－ＲＯＭ、ＤＶＤ－ＲＯＭ、半導体メモリ等である。この補助記憶装置には、各種プログラムが格納されており、ＣＰＵが補助記憶装置から主記憶装置にプログラムを読み出し、実行することにより種々の処理を実現させる。 The system control device 20 and the heat source device control devices 10a, 10b, and 10c are computers, for example, a main storage device such as a CPU (Central Processing Unit), a RAM (Random Access Memory), an auxiliary storage device, and an external device. A communication device that exchanges information by performing communication is provided.
The auxiliary storage device is a computer-readable recording medium, such as a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, or a semiconductor memory. Various programs are stored in the auxiliary storage device, and various processes are realized by the CPU reading and executing the program from the auxiliary storage device to the main storage device.
　図４は、システム制御装置２０が備える機能のうち、デマンド制限機能に関する主な要素について示した機能ブロック図である。
　図４に示されるように、システム制御装置２０は、記憶部２２、電力監視部２３、デマンド制限部２４を主な構成として備えている。 FIG. 4 is a functional block diagram showing main elements related to the demand limiting function among the functions provided in the system control apparatus 20.
As shown in FIG. 4, the system control device 20 includes a storage unit 22, a power monitoring unit 23, and a demand limiting unit 24 as main components.
　記憶部２２には、契約電力よりも低い値に設定された第１電力閾値、第１電力閾値以下に設定された第２電力閾値、及び基準設定温度（例えば、５℃）が格納されている。基準設定温度とは、熱源機２ａ、２ｂ、２ｃから負荷装置３へ供給される冷水送水温度の基準となる設定温度である。 The storage unit 22 stores a first power threshold set to a value lower than the contract power, a second power threshold set to a value lower than the first power threshold, and a reference set temperature (for example, 5 ° C.). . The reference set temperature is a set temperature that serves as a reference for the cold water supply temperature supplied from the heat source devices 2a, 2b, and 2c to the load device 3.
　電力監視部２３は、熱源システムの消費電力（以下「システム消費電力」という。）をモニタしている。例えば、熱源システムの主電源系統にマルチメータを取り付け、この計測値をシステム制御装置２０へ入力することで、システム消費電力をモニタする。 The power monitoring unit 23 monitors the power consumption of the heat source system (hereinafter referred to as “system power consumption”). For example, the system power consumption is monitored by attaching a multimeter to the main power supply system of the heat source system and inputting the measured value to the system controller 20.
　デマンド制限部２４は、電力監視部２３によってモニタリングされているシステム消費電力が契約電力を超えないようにデマンド制限を行う。例えば、デマンド制限部２４は、システム消費電力が、記憶部２２に格納されている第１電力閾値を超えた場合に、送水温度の設定温度を上昇させることによりデマンド制限を行う。このように、システム消費電力が第１電力閾値を超えた場合には、送水温度の目標値である設定温度を消費電力が低下する方向に変更する。これにより、圧縮機３１のヘッド差圧を小さくすることができ、圧縮機３１における動力を低減することができる。この結果、熱源機２ａ、２ｂ、２ｃの消費電力を抑制することができる。 The demand restriction unit 24 performs demand restriction so that the system power consumption monitored by the power monitoring unit 23 does not exceed the contract power. For example, when the system power consumption exceeds the first power threshold stored in the storage unit 22, the demand restriction unit 24 performs demand restriction by increasing the set temperature of the water supply temperature. As described above, when the system power consumption exceeds the first power threshold, the set temperature, which is the target value of the water supply temperature, is changed in a direction in which the power consumption decreases. Thereby, the head differential pressure | voltage of the compressor 31 can be made small and the motive power in the compressor 31 can be reduced. As a result, the power consumption of the heat source devices 2a, 2b, and 2c can be suppressed.
　また、デマンド制限部２４は、デマンド制限を行っている場合に、システム消費電力が記憶部２２に格納されている第２電力閾値未満となると、設定温度を下降させる。これにより、負荷装置３へ供給される冷水の送水温度を基準設定温度に近づけることができる。 In addition, when the demand restriction is performed, the demand restriction unit 24 lowers the set temperature when the system power consumption becomes less than the second power threshold stored in the storage unit 22. Thereby, the water supply temperature of the cold water supplied to the load apparatus 3 can be brought close to the reference set temperature.
　次に、上記構成からなる本実施形態に係る熱源システム１のデマンド制限について、図５を用いて説明する。
　例えば、図５における時刻ｔ１において、システム消費電力が第１電力閾値を超えると、システム制御装置２０のデマンド制御部２４が設定温度を所定のレートで上昇させる。変更後の設定温度は、システム制御装置２０から各熱源機制御装置１０ａ、１０ｂ、１０ｃに送信され、各熱源機２ａ、２ｂ、２ｃが変更後の設定温度に基づいて制御されることとなる。これにより、多少の遅延の後、システム消費電力は徐々に減少する方向に推移する（図５の時刻ｔ１から時刻ｔ２参照）。そして、時刻ｔ２において、システム消費電力が第２電力閾値未満となると、システム制御装置２０のデマンド制御部２４は、設定温度を所定のレートで下降させる。変更後の設定温度は、上記と同様に、システム制御装置２０から各熱源機制御装置２ａ、２ｂ、２ｃに送信され、各熱源機２ａ、２ｂ、２ｃが変更後の設定温度に基づいて制御される。 Next, demand limitation of the heat source system 1 according to the present embodiment configured as described above will be described with reference to FIG.
For example, when the system power consumption exceeds the first power threshold at time t1 in FIG. 5, the demand control unit 24 of the system control device 20 increases the set temperature at a predetermined rate. The changed set temperature is transmitted from the system control device 20 to the heat source device control devices 10a, 10b, and 10c, and the heat source devices 2a, 2b, and 2c are controlled based on the changed set temperature. Thus, after some delay, the system power consumption gradually decreases (see time t1 to time t2 in FIG. 5). At time t2, when the system power consumption becomes less than the second power threshold, the demand control unit 24 of the system control device 20 decreases the set temperature at a predetermined rate. Similarly to the above, the changed set temperature is transmitted from the system control device 20 to each heat source device control device 2a, 2b, 2c, and each heat source device 2a, 2b, 2c is controlled based on the changed set temperature. The
　設定温度が下降されたことにより、各熱源機２ａ、２ｂ、２ｃの消費電力が増加し、時刻ｔ３において、システム消費電力が再び第１電力閾値を超えると、システム制御装置２０のデマンド制御部２４は設定温度を所定のレートで上昇させる。この結果、システム消費電力は徐々に低下し、時刻ｔ４において、第２電力閾値未満となると、システム制御装置２０のデマンド制御部２４は、設定温度を所定のレートで低下させる。そして、設定温度が基準設定温度に達すると、基準設定温度を維持する。
　なお、図５では、設定温度を所定のレートで徐々に上昇、下降させていたが、設定温度の上昇のさせ方、下降のさせ方はこの例に限定されない。例えば、ステップ的に徐々に上昇、下降させてもよい。
また、図５では、第１電力閾値と第２電力閾値とが異なる値に設定されている場合を例示しているが、第１電力閾値と第２電力閾値とが同じ値に設定されていてもよい。 When the set temperature is lowered, the power consumption of each of the heat source devices 2a, 2b, 2c increases, and when the system power consumption again exceeds the first power threshold at time t3, the demand control unit 24 of the system control device 20 Increases the set temperature at a predetermined rate. As a result, the system power consumption gradually decreases, and when it becomes less than the second power threshold at time t4, the demand control unit 24 of the system control device 20 decreases the set temperature at a predetermined rate. When the set temperature reaches the reference set temperature, the reference set temperature is maintained.
In FIG. 5, the set temperature is gradually increased and decreased at a predetermined rate, but the method for increasing and decreasing the set temperature is not limited to this example. For example, it may be gradually raised and lowered step by step.
In addition, FIG. 5 illustrates the case where the first power threshold and the second power threshold are set to different values, but the first power threshold and the second power threshold are set to the same value. Also good.
　以上、説明したように、本実施形態に係る熱源システム及びその制御装置並びにその制御方法によれば、システム消費電力をモニタリングし、システム消費電力が第１電力閾値を超えた場合に、熱源機における冷水の設定温度を上昇させる。これにより、各熱源機における圧縮機のヘッド差圧を小さくすることができ、熱源機の消費電力を抑制することができる。この結果、システム消費電力を低下させることができ、システム消費電力が契約電力を超えることを回避することが可能となる。
　特に、上記のように、各熱源機の消費電力低減を実現させる手段として、冷水の設定温度を上昇させる方法を採用することにより、図６に示すように、熱源機の消費電力を効果的に低減させることが可能となる。 As described above, according to the heat source system, the control device thereof, and the control method thereof according to the present embodiment, the system power consumption is monitored, and when the system power consumption exceeds the first power threshold, Increase the set temperature of cold water. Thereby, the head differential pressure | voltage of the compressor in each heat source machine can be made small, and the power consumption of a heat source machine can be suppressed. As a result, the system power consumption can be reduced, and the system power consumption can be prevented from exceeding the contract power.
In particular, as described above, by adopting a method of increasing the set temperature of cold water as a means for realizing reduction in power consumption of each heat source unit, as shown in FIG. 6, the power consumption of the heat source unit is effectively reduced. It can be reduced.
　例えば、図６に示すように、横軸に負荷率、縦軸に熱源機の消費電力をとると、設計運転点（例えば、冷却水出口温度Ｔｃｏｕｔ＝３７℃，冷水出口温度Ｔｏｕｔ＝５℃）における負荷－消費電力特性は細線で示される曲線となる。これに対し、冷水の設定温度を７℃に上昇させた場合（冷却水出口温度Ｔｃｏｕｔ＝３７℃，冷水出口温度Ｔｏｕｔ＝７℃）、圧縮機のヘッド差圧が減少することから運転点が変更され、負荷－消費電力特性は太線で示される曲線となる。すなわち、ヘッド差圧が低減されることにより、負荷－消費電力特性を消費電力が低下する方向に移動させることが可能となる。 For example, as shown in FIG. 6, when the load factor is taken on the horizontal axis and the power consumption of the heat source machine is taken on the vertical axis, the design operating point (for example, cooling water outlet temperature Tcout = 37 ° C., cooling water outlet temperature Tout = 5 ° C.) The load-power consumption characteristic at is a curve indicated by a thin line. On the other hand, when the set temperature of the cold water is increased to 7 ° C. (cooling water outlet temperature Tcout = 37 ° C., cold water outlet temperature Tout = 7 ° C.), the operating point is changed because the head differential pressure of the compressor decreases. Thus, the load-power consumption characteristic is a curve indicated by a thick line. That is, by reducing the head differential pressure, it is possible to move the load-power consumption characteristic in a direction in which the power consumption decreases.
　更に、設定温度を５℃から７℃に上昇させると、負荷率も変化する。すなわち、負荷率１００％で冷水出口温度が５℃の場合に、設定温度（冷水出口温度）が７℃に変更となると、負荷率は１００％から６０％へ減少する。これにより、図６に示すように、消費電力を更に低減させることができる。
　このように、冷水の設定温度を変化させることにより、圧縮機のヘッド差圧による消費電力低減効果と、負荷率低下による消費電力低減効果との両方を得ることができ、消費電力を効果的に低減させることができる。 Furthermore, when the set temperature is increased from 5 ° C. to 7 ° C., the load factor also changes. That is, when the set temperature (cold water outlet temperature) is changed to 7 ° C. when the load factor is 100% and the cold water outlet temperature is 5 ° C., the load factor decreases from 100% to 60%. Thereby, as shown in FIG. 6, power consumption can be further reduced.
In this way, by changing the set temperature of the cold water, both the power consumption reduction effect due to the compressor head differential pressure and the power consumption reduction effect due to the load factor reduction can be obtained, effectively reducing the power consumption. Can be reduced.
　なお、上記説明では、熱源水である冷水を冷却して負荷装置３に供給する場合について述べたが、熱源機２ａ、２ｂ、２ｃにおいて加熱して温水を負荷装置３に供給する場合においては、デマンド制限部２４は、システム消費電力が第１電力閾値を超えた場合に、設定温度を下降させ、システム消費電力が第２電力閾値未満の場合に、設定温度を上昇させる。このようにすることで、同様の効果を得ることができる。 In the above description, the case where the cold water which is the heat source water is cooled and supplied to the load device 3 is described. However, in the case where the hot water is supplied to the load device 3 by heating in the heat source devices 2a, 2b and 2c, The demand limiting unit 24 decreases the set temperature when the system power consumption exceeds the first power threshold, and increases the set temperature when the system power consumption is less than the second power threshold. By doing in this way, the same effect can be acquired.
〔他の態様１〕
　熱源システム１の運用として、消費電力が契約電力を超えないように制御することよりも、負荷装置３に対して所定温度以下の冷水を供給することの方が優先される場合もある。例えば、デパートなどでは、冷水温度が上がり過ぎてしまうと室内温度が上昇してしまい、顧客に不快感を与えてしまう。このような場合を想定して、デマンド制限を行う際の設定温度の上限値を記憶部２２に予め格納しておき、設定温度が上限値に達した場合には、設定温度を上限値で維持するような態様を採ることとしてもよい。このように、上限値を設定しておくことで、冷水温度が上限値以上に上昇することを回避することができる。
　なお、熱源機において加熱を行う場合には、設定温度の下限値を設定しておき、設定温度が下限値以下となることを回避する。 [Other embodiment 1]
As operation of the heat source system 1, there are cases where priority is given to supplying cold water having a predetermined temperature or less to the load device 3 rather than controlling so that power consumption does not exceed contract power. For example, in a department store or the like, if the cold water temperature rises too much, the room temperature rises, giving the customer unpleasant feeling. Assuming such a case, the upper limit value of the set temperature when the demand restriction is performed is stored in the storage unit 22 in advance, and when the set temperature reaches the upper limit value, the set temperature is maintained at the upper limit value. It is good also as taking such an aspect. Thus, by setting the upper limit value, it is possible to avoid the chilled water temperature from rising above the upper limit value.
In addition, when heating in a heat source machine, the lower limit value of preset temperature is set and it is avoided that preset temperature becomes below a lower limit value.
〔他の態様２〕
　また、図７に示すように、デマンド制限を停止するためのデマンド制限停止部２５を設け、デマンド制限停止部２５が作動している場合には、デマンド制限を行わないようにしてもよい。デマンド制限停止部２５によるデマンド制限の停止、停止解除は、例えば、オペレータから入力される入力情報に基づいて設定されるようにしてもよい。 [Other embodiment 2]
Further, as shown in FIG. 7, a demand limit stop unit 25 for stopping the demand limit may be provided, and the demand limit may not be performed when the demand limit stop unit 25 is operating. The demand restriction stop and stop cancellation by the demand restriction stop unit 25 may be set based on, for example, input information input from an operator.
〔第２実施形態〕
　次に、本発明の第２実施形態に係る熱源システム及びその制御装置並びにその制御方法について、図面を参照して説明する。
　上述した実施形態では、システム制御装置２０が冷水の設定温度を上昇させることによりデマンド制限を行っていた。このように、冷水の設定温度を上昇させると、負荷装置３において熱量が不足するおそれがあり、この場合、冷水流量を増加させることにより熱量不足を解消する可能性がある。負荷装置３側において冷水流量を増加させる操作がなされると、各熱源機２ａ、２ｂ、２ｃに対応して設けられた冷水ポンプの回転数が増加することとなり、冷水の設定温度によるデマンド制限が効果的に作用しなくなってしまう。
　そこで、本実施形態においては、デマンド制限を行っている期間において、冷水ポンプの回転数をホールドさせ、冷水ポンプにおける消費電力増加を回避することとしている。 [Second Embodiment]
Next, a heat source system, a control device thereof, and a control method thereof according to a second embodiment of the present invention will be described with reference to the drawings.
In the embodiment described above, the system control device 20 performs the demand restriction by increasing the set temperature of the cold water. As described above, when the set temperature of the cold water is increased, the load device 3 may have a shortage of heat. In this case, the shortage of heat may be resolved by increasing the cold water flow rate. When the operation of increasing the chilled water flow rate is performed on the load device 3 side, the number of rotations of the chilled water pump provided corresponding to each of the heat source devices 2a, 2b, and 2c increases, and the demand limitation due to the set temperature of the chilled water is limited. It will not work effectively.
Therefore, in the present embodiment, the rotation speed of the chilled water pump is held during a period when the demand is limited, and an increase in power consumption in the chilled water pump is avoided.
　具体的には、システム制御装置２０のデマンド制御部は、図８に示すように、システム消費電力が第１電力閾値を超えてから第２電力閾値未満となる期間において、冷水ポンプの周波数指令をホールドさせる。これにより、負荷装置３側で冷水の流量が増加されることに起因する冷水ポンプ４ａ、４ｂ，４ｃの動力増加を回避することができ、設定温度の変更によるデマンド制限をシステム消費電力に効果的に反映させることができる。 Specifically, as shown in FIG. 8, the demand control unit of the system control device 20 issues a frequency command for the chilled water pump in a period in which the system power consumption exceeds the first power threshold and is less than the second power threshold. Hold. As a result, it is possible to avoid an increase in power of the chilled water pumps 4a, 4b, and 4c due to an increase in the flow rate of the chilled water on the load device 3 side, and the demand limitation due to the change of the set temperature is effective for the system power consumption. Can be reflected.
〔第３実施形態〕
　次に、本発明の第３実施形態に係る熱源システム及びその制御装置並びにその制御方法について、図面を参照して説明する。
　上述した第１または第２実施形態に係るデマンド制限を行った場合であっても、最終的にシステム消費電力が契約電力を超えてしまう可能性がある。このような場合に対応するために、本実施形態では、図９に示すように、第１電力閾値よりも大きく、契約電力よりも小さい値に設定された第３電力閾値を記憶部２２に更に格納しておき、システム消費電力が第３電力閾値を超えた場合に、デマンド制御部２４が運転中の熱源機を１台強制停止させる。 [Third Embodiment]
Next, a heat source system, a control device thereof, and a control method thereof according to a third embodiment of the present invention will be described with reference to the drawings.
Even when the demand restriction according to the first or second embodiment described above is performed, the system power consumption may eventually exceed the contract power. In order to cope with such a case, in the present embodiment, as shown in FIG. 9, a third power threshold set to a value larger than the first power threshold and smaller than the contract power is further stored in the storage unit 22. Stored, and when the system power consumption exceeds the third power threshold, the demand control unit 24 forcibly stops one operating heat source unit.
　これにより、デマンド制限部２４が設定温度を上昇させるデマンド制限を行っているにもかかわらず、システム消費電力が増加し続けるような場合であっても、契約電力に達する前に１台の熱源機の運転を強制的に停止させるので、システム消費電力を急激に低下させ、システム消費電力が契約電力を超えることを防止することができる。
　また、この場合、デマンド制御部２４は、システム消費電力が第２電力閾値未満となった場合に、強制的に停止させた熱源機を再起動させることとしてもよい。 As a result, even if the system power consumption continues to increase even though the demand limiting unit 24 performs the demand limitation to increase the set temperature, one heat source machine is reached before the contract power is reached. Therefore, the system power consumption can be drastically reduced and the system power consumption can be prevented from exceeding the contract power.
In this case, the demand control unit 24 may restart the heat source machine that has been forcibly stopped when the system power consumption becomes less than the second power threshold.
〔第４実施形態〕
　次に、本発明の第４実施形態に係る熱源システム及びその制御装置並びにその制御方法について、図面を参照して説明する。
　本実施形態に係る熱源システムは、システム消費電力が第１電力閾値を超えた場合に、システム制御装置２０のデマンド制限部２４が、上述した第１から第３のいずれかの実施形態に係るデマンド制限を行うと共に、負荷装置３が備える各種電動機器（図示略）の動力を低減させる制御を行う点で上述の各実施形態に係る熱源システムとは異なる。 [Fourth Embodiment]
Next, a heat source system, a control device thereof, and a control method thereof according to a fourth embodiment of the present invention will be described with reference to the drawings.
In the heat source system according to the present embodiment, when the system power consumption exceeds the first power threshold, the demand limiting unit 24 of the system control device 20 performs the demand according to any of the first to third embodiments described above. It differs from the heat source system which concerns on each above-mentioned embodiment by the point which performs control which reduces the motive power of the various electric equipment (illustration omitted) with which the load apparatus 3 is provided while restrict | limiting.
　例えば、負荷装置３が空調設備であった場合、室内における送風量はファンの回転数を変化させることにより可変とされる。このように、負荷装置３においてインバータ制御される電動機器が設けられていた場合に、デマンド制御部２４は、熱源機における設定温度を変更するとともに、負荷装置３における電動機器の周波数を低減させることにより更なるシステム消費電力の抑制を図る。
　これにより、システム消費電力を速やかに低減させることができ、システム消費電力が契約電力を超える可能性を低減させることができる。 For example, when the load device 3 is an air conditioner, the amount of air blown indoors is made variable by changing the rotational speed of the fan. Thus, when the electric equipment by which inverter control is carried out in the load apparatus 3, the demand control part 24 reduces the frequency of the electric equipment in the load apparatus 3 while changing the preset temperature in a heat source machine. To further reduce system power consumption.
Thereby, system power consumption can be reduced rapidly and possibility that system power consumption will exceed contract power can be reduced.
〔第５実施形態〕
　次に、本発明の第５実施形態に係る熱源システム及びその制御装置並びにその制御方法について、図面を参照して説明する。
　上述した第１から第４実施形態では、現在のシステム消費電力と各電力閾値とを比較することによりデマンド制限を行っていた。この場合、デマンド制限が開始されてからシステム消費電力が低下するまでにはある程度の時間が必要となるため、場合によってはデマンド制限を実施したとしてもシステム消費電力が契約電力を超えてしまう可能性がある。 [Fifth Embodiment]
Next, a heat source system, a control device thereof, and a control method thereof according to a fifth embodiment of the present invention will be described with reference to the drawings.
In the first to fourth embodiments described above, demand restriction is performed by comparing the current system power consumption with each power threshold value. In this case, since a certain amount of time is required until the system power consumption decreases after the demand limit starts, the system power consumption may exceed the contracted power even if the demand limit is implemented. There is.
　そこで、本実施形態では、図１０に示すように、システム制御装置に電力予測部２６を設けることとした。電力予測部２６は、図１１に示すように、現在から過去所定期間Ｔ１における熱源システムの消費電力の挙動から将来の消費電力を予測する。デマンド制限部２４は、現在から所定期間Ｔ２後における予測消費電力が第１電力閾値を超える場合に、デマンド制限を開始させる。
　ここで、上記所定期間Ｔ１は、任意に決定できる期間であり、例えば、３０分から１時間程度に設定される。また、上記所定期間Ｔ２は、少なくともデマンド制限を開始させてからシステム消費電力が低下し始めるまでの時間遅延よりも長い時間に設定されている。 Therefore, in the present embodiment, as shown in FIG. 10, the power prediction unit 26 is provided in the system control device. As shown in FIG. 11, the power prediction unit 26 predicts future power consumption from the behavior of power consumption of the heat source system in the past predetermined period T1 from the present time. The demand restriction unit 24 starts demand restriction when the predicted power consumption after a predetermined period T2 from the present time exceeds the first power threshold.
Here, the predetermined period T1 is a period that can be arbitrarily determined, and is set to about 30 minutes to 1 hour, for example. In addition, the predetermined period T2 is set to a time longer than at least a time delay from when the demand restriction is started until the system power consumption starts to decrease.
　このように、過去のシステム消費電力の挙動から将来のシステム消費電力を予測し、この予測したシステム消費電力に基づいてデマンド制限を開始するか否かを決定するので、システム消費電力が契約電力を超えることを効果的に回避することが可能となる。 In this way, the future system power consumption is predicted from the behavior of the past system power consumption, and it is determined whether to start demand restriction based on the predicted system power consumption. It is possible to effectively avoid exceeding.
　電力予測部２６による電力予測の方法については、公知の予測技術を採用することができ、例えば、過去一定期間におけるシステム消費電力の変化率から将来の電力を予測する。 As a method of power prediction by the power prediction unit 26, a known prediction technique can be adopted, and for example, future power is predicted from the rate of change of system power consumption in a past fixed period.
　なお、上述した各実施形態においては、システム制御装置２０が各熱源機のデマンド制限を統括して行う態様としていたが、これに代えて、デマンド制限機能を各熱源機制御装置１０ａ、１０ｂ、１０ｃに設け、熱源機単位でデマンド制限を行うこととしてもよい。
　この場合、上述したような第１電力閾値、第２電力閾値などは、例えば、システム全体としての契約電力から按分される個々の熱源機の制限電力に基づいて設定され、各熱源機それぞれの消費電力と第１電力閾値、第２電力閾値との関係に基づいて上述したようなデマンド制限が行われる。なお、各熱源機の消費電力は、各熱源機の電源系統にマルチメータを取り付けることにより検出可能である。
　このように、システム制御装置２０が備えていたデマンド制限機能を各熱源機制御装置に設けることによっても消費電力を抑制することが可能となる。 In each of the above-described embodiments, the system controller 20 controls the demand of each heat source unit in an integrated manner. However, instead of this, a demand limiting function is provided for each heat source unit controller 10a, 10b, 10c. It is also possible to limit demand on a heat source unit basis.
In this case, the first power threshold, the second power threshold, and the like as described above are set based on, for example, the limit power of each heat source unit that is apportioned from the contract power of the entire system, and the consumption of each heat source unit. The demand restriction as described above is performed based on the relationship between the power, the first power threshold, and the second power threshold. The power consumption of each heat source device can be detected by attaching a multimeter to the power supply system of each heat source device.
Thus, it becomes possible to suppress power consumption also by providing the demand limiting function provided in the system control device 20 in each heat source device control device.
　更に、上記の変形例として、消費電力のモニタをシステム制御装置２０において行うこととしてもよい。すなわち、システム制御装置２０がシステム消費電力をモニタし、このシステム消費電力が第１電力閾値を超えた場合に、各熱源機制御装置に対してデマンド制限を開始するデマンド制限開始指令を通知することとしても良い。このように、システム制御装置２０において、各閾値とシステム消費電力との比較を行うこととし、この比較結果を各熱源機制御装置に通知することにより、デマンド制限を実施させることとしてもよい。
　なお、各熱源機単位でデマンド制限を行う場合には、熱源機間において、設定温度の変更レートが異なってもよい。 Furthermore, as a modification of the above, power consumption may be monitored in the system control device 20. That is, the system control device 20 monitors the system power consumption, and when the system power consumption exceeds the first power threshold, notifies each heat source device control device of a demand restriction start command for starting demand restriction. It is also good. As described above, the system control device 20 may compare each threshold value with the system power consumption, and may notify the heat source device control device of the comparison result to perform demand restriction.
When the demand restriction is performed for each heat source unit, the change rate of the set temperature may be different between the heat source units.
　次に、本発明の一実施形態に係る電力調整ネットワークシステムについて説明する。
　本実施形態に係る電力調整ネットワークシステムは、図１２に示すように、上述したいずれかの実施形態に係る複数の熱源システムのシステム制御装置２０ａ、２０ｂ、２０ｃと、各熱源システムのシステム制御装置２０ａ、２０ｂ，２０ｃと通信媒体５１を介して接続される中央監視装置５０とを備えている。 Next, a power adjustment network system according to an embodiment of the present invention will be described.
As shown in FIG. 12, the power adjustment network system according to this embodiment includes system control devices 20a, 20b, and 20c for a plurality of heat source systems according to any of the above-described embodiments, and a system control device 20a for each heat source system. , 20b, 20c and a central monitoring device 50 connected via a communication medium 51.
　中央監視装置５０は、各熱源システムのシステム制御装置２０ａ、２０ｂ，２０ｃからそれぞれのシステム消費電力等を取得し、これらの情報と契約電力とに基づいて第１電力閾値を決定し、この第１電力閾値を各システム制御装置２０に対して送信する。例えば、中央監視装置５０は、デマンド制限が行われている又はデマンド制限が開始されそうな熱源システムと、デマンド制限が開始されるまでに余裕がある、換言すると、システム消費電力と第１電力閾値との差が所定値以上ある熱源システムが存在した場合、前者の熱源システムの第１電力閾値を増加させ、後者の熱源システムの第１電力閾値を低下させる。このように、熱源システム間におけるシステム消費電力を比較することによって各熱源システムの第１電力閾値を調整することにより、柔軟な電力調整を行うことが可能となる。 The central monitoring device 50 acquires the respective system power consumption and the like from the system control devices 20a, 20b, and 20c of each heat source system, determines the first power threshold based on these information and the contract power, and this first The power threshold value is transmitted to each system control device 20. For example, the central monitoring device 50 has a heat source system in which the demand limit is performed or the demand limit is likely to start, and there is a margin before the demand limit is started, in other words, the system power consumption and the first power threshold value. When there is a heat source system having a difference between the first heat threshold value and a predetermined value or more, the first power threshold value of the former heat source system is increased and the first power threshold value of the latter heat source system is decreased. In this way, by adjusting the first power threshold value of each heat source system by comparing the system power consumption between the heat source systems, flexible power adjustment can be performed.
１　熱源システム
２ａ、２ｂ、２ｃ　熱源機
３　負荷装置
４ａ、４ｂ、４ｃ　送水ポンプ
５　サプライヘッダ
６　リターンヘッダ
１０ａ、１０ｂ、１０ｃ　熱源機制御装置
２０　システム制御装置
２１　通信媒体
２２　記憶部
２３　電力監視部
２４　デマンド制限部
２５　デマンド制限停止部
２６　電力予測部
３１　ターボ圧縮機
３８　インバータ
５０　中央監視装置 DESCRIPTION OF SYMBOLS 1 Heat source system 2a, 2b, 2c Heat source machine 3 Load apparatus 4a, 4b, 4c Water supply pump 5 Supply header 6 Return header 10a, 10b, 10c Heat source machine control apparatus 20 System control apparatus 21 Communication medium 22 Storage part 23 Electric power monitoring part 24 Demand limit unit 25 Demand limit stop unit 26 Power prediction unit 31 Turbo compressor 38 Inverter 50 Central monitoring device

Claims (13)

  1. 　設定温度に従って熱源水の加熱または冷却を行い、加熱後または冷却後の熱源水を負荷装置へ供給する少なくとも１台の熱源機を備える熱源システムに適用される制御装置であって、
    　前記熱源システムの消費電力をモニタする電力監視手段と、
    　前記熱源システムの消費電力が、契約電力よりも低い値に設定された第１電力閾値を超えた場合に、前記熱源機の消費電力が低下する方向に前記設定温度を上昇または下降させることによりデマンド制限を行うデマンド制限手段と
    を具備する熱源システムの制御装置。     A control device applied to a heat source system including at least one heat source unit that heats or cools the heat source water according to a set temperature and supplies the heated or cooled heat source water to a load device,
    Power monitoring means for monitoring power consumption of the heat source system;
    When the power consumption of the heat source system exceeds the first power threshold set to a value lower than the contract power, the demand temperature is increased or decreased in the direction in which the power consumption of the heat source unit decreases. A control device for a heat source system, comprising demand limiting means for limiting.
  2. 　前記デマンド制限手段は、前記熱源システムの消費電力が、前記第１電力閾値以下に設定された前記第２電力閾値未満となった場合に、前記熱源機の消費電力が増加する方向に前記設定温度を下降または上昇させ、現在の設定温度が予め設定されている基準設定温度に達した場合にその設定温度を維持する請求項１に記載の熱源システムの制御装置。 The demand limiting unit is configured to increase the power consumption of the heat source unit in a direction in which the power consumption of the heat source unit increases when the power consumption of the heat source system becomes less than the second power threshold set to be equal to or lower than the first power threshold. The controller of the heat source system according to claim 1, wherein when the current set temperature reaches a preset reference set temperature, the set temperature is maintained.
  3. 　前記デマンド制限手段は、前記熱源機が前記熱源水の加熱を行っている場合には、前記設定温度が予め設定されている下限値未満とならないように前記設定温度を下降させ、前記熱源機が前記熱源水の冷却を行っている場合には、前記設定温度が予め設定されている上限値を超えないように前記設定温度を上昇させる請求項１または請求項２に記載の熱源システムの制御装置。 When the heat source device is heating the heat source water, the demand limiting unit lowers the set temperature so that the set temperature does not become lower than a preset lower limit value, and the heat source device 3. The control device for a heat source system according to claim 1, wherein when the heat source water is cooled, the set temperature is increased so that the set temperature does not exceed a preset upper limit value. .
  4. 　前記デマンド制限手段によるデマンド制限を停止させるデマンド制限停止手段を備える請求項１から請求項３のいずれかに記載の熱源システムの制御装置。 The control device for a heat source system according to any one of claims 1 to 3, further comprising demand restriction stopping means for stopping demand restriction by the demand restriction means.
  5. 　前記外部装置から前記熱源機に送られる熱源水の流量を調節する電動の送水手段を備え、
    　前記デマンド制限手段は、前記熱源システムの消費電力が前記第１電力閾値を超えている期間において、前記送水手段の回転数をホールドさせる請求項１から請求項４のいずれかに記載の熱源システムの制御装置。     Electric water supply means for adjusting the flow rate of heat source water sent from the external device to the heat source machine,
    5. The heat source system according to claim 1, wherein the demand limiting unit holds the number of rotations of the water supply unit during a period in which power consumption of the heat source system exceeds the first power threshold. Control device.
  6. 　前記デマンド制限手段は、前記熱源システムの消費電力が、前記第１電力閾値よりも高い値であり、前記契約電力よりも低い値に設定された第３電力閾値を超えた場合に、所定の前記熱源機の運転を停止させる請求項１から請求項５のいずれかに記載の熱源システムの制御装置。 The demand limiting means has a predetermined value when the power consumption of the heat source system is higher than the first power threshold and exceeds a third power threshold set to a value lower than the contract power. The control device for a heat source system according to any one of claims 1 to 5, wherein the operation of the heat source machine is stopped.
  7. 　前記デマンド制限手段は、前記熱源システムの消費電力が前記第１電力閾値を超えている期間において、前記負荷装置が備える電動機器の消費電力を低下させる制御を行う請求項１から請求項６のいずれかに記載の熱源システムの制御装置。 The said demand restriction | limiting means performs control which reduces the power consumption of the electric equipment with which the said load apparatus is provided in the period when the power consumption of the said heat-source system exceeds the said 1st power threshold value. A control device for a heat source system according to claim 1.
  8. 　過去の所定期間における熱源システムの消費電力の挙動から将来の消費電力を予測する電力予測手段を備え、
    　前記デマンド制限手段は、現在から所定期間後における予測消費電力が前記第１電力閾値を超える場合に、前記デマンド制限を開始する請求項１から請求項７のいずれかに記載の熱源システムの制御装置。     Power prediction means for predicting future power consumption from the behavior of power consumption of the heat source system in the past predetermined period,
    The control device for a heat source system according to any one of claims 1 to 7, wherein the demand restriction unit starts the demand restriction when a predicted power consumption after a predetermined period from the present time exceeds the first power threshold value. .
  9. 　設定温度に従って熱源水の加熱または冷却を行い、加熱後または冷却後の熱源水を負荷装置へ供給する少なくとも１台の熱源機を備える熱源システムに適用される制御方法であって、
    　前記熱源システムの消費電力をモニタし、
    　前記熱源システムの消費電力が、契約電力よりも低い値に設定された第１電力閾値を超えた場合に、前記熱源機の消費電力が低下する方向に前記設定温度を上昇または下降させることによりデマンド制限を行う熱源システムの制御方法。     A control method applied to a heat source system including at least one heat source unit that heats or cools heat source water according to a set temperature and supplies the heated or cooled heat source water to a load device,
    Monitoring the power consumption of the heat source system;
    When the power consumption of the heat source system exceeds the first power threshold set to a value lower than the contract power, the demand temperature is increased or decreased in the direction in which the power consumption of the heat source unit decreases. Control method of heat source system to limit
  10. 　請求項１から請求項８のいずれかに記載の熱源システムの制御装置を備える熱源システム。 A heat source system comprising the heat source system control device according to any one of claims 1 to 8.
  11. 　設定温度に従って熱源水の加熱または冷却を行い、加熱後または冷却後の熱源水を負荷装置へ供給する少なくとも１台の熱源機を備える熱源システムであって、
    　前記熱源機に対応してそれぞれ設けられ、対応する前記熱源機を制御する熱源機制御手段と、
    　各前記熱源機制御手段に対して制御指令を与えるシステム制御手段と
    を備え、
    　前記システム制御手段は、前記熱源システムの消費電力をモニタする電力監視手段と、
    　前記熱源システムの消費電力が、契約電力よりも低い値に設定された第１電力閾値を超えた場合に、各前記熱源機制御手段にデマンド制限開始指令を通知する通知手段と
    を備え、
    　前記熱源機制御手段は、前記デマンド制限開始指令が通知された場合に、消費電力が低下する方向に前記設定温度を上昇または下降させることによりデマンド制限を行うデマンド制限手段を備える熱源システム。     A heat source system comprising at least one heat source unit that heats or cools heat source water according to a set temperature and supplies the heated or cooled heat source water to a load device,
    A heat source machine control means for controlling the corresponding heat source machine, each provided corresponding to the heat source machine;
    System control means for giving a control command to each of the heat source machine control means,
    The system control means includes power monitoring means for monitoring power consumption of the heat source system;
    A notification means for notifying each heat source unit control means of a demand limit start command when the power consumption of the heat source system exceeds a first power threshold set to a value lower than the contract power,
    The heat source device control means includes a demand restriction means for restricting demand by raising or lowering the set temperature in a direction in which power consumption is reduced when the demand restriction start command is notified.
  12. 　請求項１０または請求項１１に記載の複数の熱源システムと、
    　各前記熱源システムの制御装置と通信媒体を介して接続される中央監視装置と
    を備え、
    　前記中央制御装置から各前記熱源システムの制御装置に対して前記第１電力閾値が通知される電力調整ネットワークシステム。     A plurality of heat source systems according to claim 10 or claim 11,
    A central monitoring device connected to the control device of each of the heat source systems via a communication medium,
    The power adjustment network system in which the first power threshold is notified from the central control device to the control device of each of the heat source systems.
  13. 　設定温度に従って熱源水の加熱または冷却を行い、加熱後または冷却後の熱源水を負荷装置へ供給する熱源機の制御装置であって、
    　前記熱源機の消費電力をモニタする電力監視手段と、
    　前記熱源機の消費電力が、契約電力よりも低い値に設定された第１電力閾値を超えた場合に、前記熱源機の消費電力が低下する方向に前記設定温度を上昇または下降させることによりデマンド制限を行うデマンド制限手段と
    を具備する熱源機の制御装置。     A control device for a heat source unit that heats or cools the heat source water according to a set temperature and supplies the heated or cooled heat source water to the load device,
    Power monitoring means for monitoring power consumption of the heat source unit;
    When the power consumption of the heat source unit exceeds a first power threshold set to a value lower than the contract power, the demand temperature is increased or decreased in a direction in which the power consumption of the heat source unit decreases. A control device for a heat source device, comprising demand limiting means for limiting.
PCT/JP2013/052153 2012-03-30 2013-01-31 Heat source system, device for controlling same, and method for controlling same WO2013145844A1 (en)

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