CN104654525A - Air conditioner host increasing and decreasing control method and device and air conditioner system - Google Patents
Air conditioner host increasing and decreasing control method and device and air conditioner system Download PDFInfo
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- CN104654525A CN104654525A CN201510053981.0A CN201510053981A CN104654525A CN 104654525 A CN104654525 A CN 104654525A CN 201510053981 A CN201510053981 A CN 201510053981A CN 104654525 A CN104654525 A CN 104654525A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000003247 decreasing effect Effects 0.000 title abstract description 5
- 238000004364 calculation method Methods 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 230000005494 condensation Effects 0.000 claims description 12
- 238000009833 condensation Methods 0.000 claims description 12
- 239000000498 cooling water Substances 0.000 claims description 12
- 238000001704 evaporation Methods 0.000 claims description 12
- 230000008020 evaporation Effects 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000005057 refrigeration Methods 0.000 claims description 9
- 238000004378 air conditioning Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 description 4
- 238000005094 computer simulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
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- 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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- 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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner host increasing and decreasing machine control method and device and an air conditioner system. The air conditioner host increase and decrease control method comprises the following steps: obtaining a calculation model of the refrigerating/heating quantity and the operating power of a host; obtaining the actual load demand Q of the air conditioner terminal0(ii) a Respectively calculating the refrigerating/heating quantity of a single host as Q according to the calculation model0At/i, the corresponding first operating power NiWherein i is a natural number not equal to zero, and i is 1, 2, 3, …, T, and T is the total host number; respectively calculating at a first operating power NiThe first total power consumed when the i host computers are started is obtained, and therefore T first total powers are obtained; and determining the number of the hosts corresponding to the minimum first total power in the T first total powers, namely the number of the actual hosts. The invention controls the actual running number of the main machines according to the principle of minimizing the sum of the powers of the parallel main machines, meets the aim of maximizing the energy-saving effect and maximizes the energy-saving effect of the cold station.
Description
Technical Field
The invention relates to the field of air conditioner control, in particular to an air conditioner host increasing and decreasing control method and device and an air conditioner system.
Background
The energy consumption of the host accounts for 60-70% of that of the system of the cold station, and the energy-saving operation of the host is important for improving the energy efficiency of the whole system. In most air conditioning systems, a plurality of main machines are operated in parallel. Therefore, the actual number of operating hosts and the load factor of each host determine the energy consumption of the entire parallel group of hosts.
The intrinsic performance curves of different brands and different types of hosts are different, and the highest energy efficiency point is not necessarily near the full-load working condition. However, in the conventional air conditioning control system, in order to simplify the complexity of the control, the control method generally adopted is as follows: when the on-line host cannot meet the cold/heat load requirement at the end of the air conditioner, the next host is started, i.e. the host is operated in a full load state as much as possible, which is obviously not the most energy-saving.
Disclosure of Invention
The embodiment of the invention provides an air conditioner host increasing and decreasing control method and device and an air conditioner system, which can reduce the running energy consumption of a host and improve the running efficiency of the air conditioner system.
In order to solve the technical problem, an embodiment of the present invention provides an air conditioner host increase/decrease control method, including: obtaining a calculation model of the refrigerating/heating quantity and the operating power of a host; obtaining the actual load demand Q of the air conditioner terminal0(ii) a Respectively calculating the refrigerating/heating quantity of a single host as Q according to the calculation model0At/i, the corresponding first operating power NiWherein i is a natural number not equal to zero, and i is 1, 2, 3, …, T, and T is the total host number; respectively calculating at a first operating power NiThe first total power consumed when the i host computers are started is obtained, and therefore T first total powers are obtained; and determining the number of the hosts corresponding to the minimum first total power in the T first total powers, namely the number of the actual hosts.
Preferably, the computational model is determined by performance parameters of the host computer.
Preferably, the calculation model is expressed by the following formula:
Q＝Σ(An+2+An+1*Xn+An*Xn-1*Y+An-1*Xn-2*Y2+……+A2*X*Yn-1+A1*Yn)
formula (1) N ═ Σ (B)n+2+Bn+1*Xn+Bn*Xn-1*Y+Bn-1*Xn-2*Y2+……+B2*X*Yn-1+B1*Yn)
Formula (2)
Wherein,
q is refrigeration/heating capacity;
n is the running power;
n is a natural number not equal to 0;
a and B are fitting coefficients;
x and Y are performance parameters of the main machine, and are any two parameters of chilled water inlet temperature, chilled water outlet temperature, cooling water inlet temperature, cooling water outlet temperature, main machine evaporation temperature/evaporation pressure, main machine condensation temperature/condensation pressure, or main machine compressor suction temperature/exhaust temperature.
Preferably, the cooling/heating capacity Q of each main unit is calculated according to the calculation model0I, corresponding to the first operating power NiThe method comprises the following steps: determining a value a corresponding to two parameters X and Y used in equation (1) according to equation (1) with the refrigeration/heating amount known; determining a B value corresponding to the A value; the first operating power is determined according to equation (2), the X and Y parameters used, and the B value.
Preferably, the fitting coefficients a and B are sets of corresponding parameters fitted by fitting software.
The second aspect of the present invention provides an air conditioner host increase and decrease control device, including: the model acquisition module is used for acquiring a calculation model of the refrigerating/heating capacity and the operating power of the host; an actual load demand obtaining module for obtaining an actual load demand Q at the end of the air conditioner0(ii) a A first calculation module for calculating the refrigerating/heating quantity of each host computer as Q according to the calculation model0At/i, the corresponding first operating power NiWherein i is a natural number not equal to zero, and i is 1, 2, 3, …, T, and T is the total host number; a second calculation module for calculating the power N at the first operationiThe first total power consumed when the i host computers are started is obtained, and therefore T first total powers are obtained; a host number determining module for determining the host corresponding to the minimum first total power in the T first total powersThe number of the host computers is the actual number of the host computers.
Preferably, the calculation model is expressed by the following formula:
Q＝Σ(An+2+An+1*Xn+An*Xn-1*Y+An-1*Xn-2*Y2+……+A2*X*Yn-1+A1*Yn)
formula (1)
N＝Σ(Bn+2+Bn+1*Xn+Bn*Xn-1*Y+Bn-1*Xn-2*Y2+……+B2*X*Yn-1+B1*Yn)
Formula (2)
Wherein,
q is refrigeration/heating capacity;
n is the running power;
n is a natural number not equal to zero;
a and B are fitting coefficients;
x and Y are performance parameters of the main machine, and are any two parameters of chilled water inlet temperature, chilled water outlet temperature, cooling water inlet temperature, cooling water outlet temperature, main machine evaporation temperature/evaporation pressure, main machine condensation temperature/condensation pressure, or main machine compressor suction temperature/exhaust temperature.
Preferably, the first calculation module includes: a first processing module for determining a value A corresponding to two parameters of X and Y used in the formula (1) according to the formula (1) under the condition that the refrigerating/heating quantity is known; the second processing module is used for determining a B value corresponding to the A value; and the third processing module is used for determining the first operating power according to the formula (2), the used X and Y parameters and the B value.
Preferably, the fitting coefficients a and B are sets of corresponding parameters fitted by fitting software.
In a third aspect of the present invention, an air conditioning system is provided, which includes the above-mentioned air conditioner host increase/decrease control device.
The invention controls the actual running number of the main machines according to the principle of minimizing the sum of the powers of the parallel main machines, meets the aim of maximizing the energy-saving effect and maximizes the energy-saving effect of the cold station.
Drawings
FIG. 1 is a flow chart of an air conditioner host control method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an air conditioner host increase and decrease control device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and the examples, but without limiting the invention.
Referring to fig. 1, the present invention provides an air conditioner host increase/decrease control method, including: obtaining a calculation model of the refrigerating/heating quantity and the operating power of a host; obtaining the actual load demand Q of the air conditioner terminal0(ii) a Respectively calculating the refrigerating/heating quantity of a single host as Q according to the calculation model0At/i, the corresponding first operating power NiWherein i is a natural number not equal to zero, and i is 1, 2, 3, …, T, and T is the total host number; respectively calculating at a first operating power NiThe first total power consumed when the i host computers are started is obtained, and therefore T first total powers are obtained; the number of the hosts corresponding to the minimum first total power in the T first total powers is determined, namely the number of the actual hosts, so that the online running number of the hosts is optimized, and the optimal energy saving is achievedAnd (5) effect. In particular, the air conditioning terminal of the present invention may include one or more of a fresh air handling unit, an air conditioning cabinet, a fan coil, and the like.
For example, according to the actual load demand Q of the terminal0Respectively calculating the refrigerating/heating quantity of a single main machine to be Q0、Q0/2、Q0At/3, … …, the first operation power N of the corresponding host1、N2、N3、……。
Then, respectively calculating: only 1 host is started, the first total power is N1(ii) a 2 hosts are started, and the first total power is 2 × N2(ii) a Starting 3 hosts, the first total power is 3 × N3，……。
And then, sequentially comparing the plurality of first total powers, and controlling the actual running number of the hosts according to the principle of minimizing the sum of the powers of the hosts connected in parallel, thereby meeting the aim of maximizing the energy-saving effect. For example, in N1，2*N2，3*N3… …, 3 × N3Is the smallest, then due to the sum of 3 x N3The number of corresponding hosts is 3, and therefore, the number of actual hosts is 3.
Therefore, according to the technical scheme, the actual running number of the main machines is controlled according to the principle that the sum of the powers of the main machines connected in parallel is minimized, the aim of maximizing the energy-saving effect is fulfilled, and the energy-saving effect of the cold station is maximized.
Preferably, the computational model is determined by performance parameters of the host computer.
Preferably, the calculation model is expressed by the following formula:
Q＝Σ(An+2+An+1*Xn+An*Xn-1*Y+An-1*Xn-2*Y2+……+A2*X*Yn-1+A1*Yn)
formula (1)
N＝Σ(Bn+2+Bn+1*Xn+Bn*Xn-1*Y+Bn-1*Xn-2*Y2+……+B2*X*Yn-1+B1*Yn)
Formula (2)
Wherein,
q is refrigeration/heating capacity;
n is the running power;
n is a natural number not equal to 0;
a and B are fitting coefficients;
x and Y are performance parameters of the main machine, and are any two parameters of chilled water inlet temperature, chilled water outlet temperature, cooling water inlet temperature, cooling water outlet temperature, main machine evaporation temperature/evaporation pressure, main machine condensation temperature/condensation pressure, or main machine compressor suction temperature/exhaust temperature.
Preferably, the cooling/heating capacity Q of each main unit is calculated according to the calculation model0I, corresponding to the first operating power NiThe method comprises the following steps: determining a value a corresponding to two parameters X and Y used in equation (1) according to equation (1) with the refrigeration/heating amount known; determining a B value corresponding to the A value; the first operating power is determined according to equation (2), the X and Y parameters used, and the B value. Preferably, the fitting coefficients a and B are sets of corresponding parameters fitted by fitting software.
In this way, since there is a correspondence between a and B, when the amount of cooling/heating is known, the value of parameter a can be inferred by equation (1) and then the value of parameter B corresponding to parameter a can be obtained, so that the first operating power can be calculated by equation (2).
The second aspect of the present invention provides an air conditioner host increase and decrease control device, which is used to implement the above air conditioner host increase and decrease control method, and the same parts are not described herein again.
Referring to fig. 2, the host air conditioner control device includes: the model acquisition module 10 is used for acquiring a calculation model of the refrigerating/heating capacity and the operating power of the host; an actual load demand obtaining module 20, configured to obtain an actual load demand Q at an end of the air conditioner0(ii) a A first calculating module 30, configured to calculate the amount of cooling/heating of each host as Q according to the calculation model0At/i, the corresponding first operating power NiWherein i is a natural number not equal to zero, and i is 1, 2, 3, …, T, and T is the total host number; a second calculation module 40 for calculating the power N at the first operationiThe first total power consumed when the i host computers are started is obtained, and therefore T first total powers are obtained; the number-of-host-devices determining module 50 is configured to determine the number of host devices corresponding to the smallest first total power among the T first total powers, that is, the number of actual host devices operating.
Preferably, the calculation model is expressed by the following formula:
Q＝Σ(An+2+An+1*Xn+An*Xn-1*Y+An-1*Xn-2*Y2+……+A2*X*Yn-1+A1*Yn)
formula (1)
N＝Σ(Bn+2+Bn+1*Xn+Bn*Xn-1*Y+Bn-1*Xn-2*Y2+……+B2*X*Yn-1+B1*Yn)
Formula (2)
Wherein,
q is refrigeration/heating capacity;
n is the running power;
n is a natural number not equal to zero;
a and B are fitting coefficients;
x and Y are performance parameters of the main machine, and are any two parameters of chilled water inlet temperature, chilled water outlet temperature, cooling water inlet temperature, cooling water outlet temperature, main machine evaporation temperature/evaporation pressure, main machine condensation temperature/condensation pressure, or main machine compressor suction temperature/exhaust temperature.
Preferably, the first calculation module 30 includes: a first processing module for determining a value A corresponding to two parameters of X and Y used in the formula (1) according to the formula (1) under the condition that the refrigerating/heating quantity is known; the second processing module is used for determining a B value corresponding to the A value; and the third processing module is used for determining the first operating power according to the formula (2), the used X and Y parameters and the B value.
Preferably, the fitting coefficients a and B are sets of corresponding parameters fitted by fitting software.
In a third aspect of the present invention, an air conditioning system is provided, which includes the above-mentioned air conditioner host increase/decrease control device.
The invention determines the number of the actual running hosts by comparing the power sum of all the online hosts which are connected in parallel under different running numbers, thereby achieving the purpose of minimizing the running energy consumption of all the hosts which are connected in parallel with the cold station, and further maximizing the running efficiency of the whole cold station air conditioning system.
Of course, the above is a preferred embodiment of the present invention. It should be noted that, for a person skilled in the art, several modifications and refinements can be made without departing from the basic principle of the invention, and these modifications and refinements are also considered to be within the protective scope of the invention.
Claims (10)
1. An air conditioner host increase and decrease control method is characterized by comprising the following steps:
obtaining a calculation model of the refrigerating/heating quantity and the operating power of a host;
obtaining the actual load demand Q of the air conditioner terminal0；
Respectively calculating the refrigerating/heating quantity of a single host as Q according to the calculation model0At/i, the corresponding first operating power NiWherein i is a natural number not equal to zero, and i is 1, 2, 3, …, T, and T is the total host number;
respectively calculating the first running power NiThe first total power consumed when the i host computers are started is obtained, and therefore T first total powers are obtained;
and determining the number of the hosts corresponding to the minimum first total power in the T first total powers, namely the number of the actual hosts.
2. The air conditioner host increase and decrease control method according to claim 1, wherein the calculation model is determined by performance parameters of the host.
3. The air conditioner host machine increase and decrease control method according to claim 1, wherein the calculation model is expressed by the following formula:
Q＝Σ(An+2+An+1*Xn+An*Xn-1*Y+An-1*Xn-2*Y2+……+A2*X*Yn-1+A1*Yn)
formula (1)
N＝Σ(Bn+2+Bn+1*Xn+Bn*Xn-1*Y+Bn-1*Xn-2*Y2+……+B2*X*Yn-1+B1*Yn)
Formula (2)
Wherein,
q is refrigeration/heating capacity;
n is the running power;
n is a natural number not equal to 0;
a and B are fitting coefficients;
x and Y are performance parameters of the main machine, and are any two parameters of chilled water inlet temperature, chilled water outlet temperature, cooling water inlet temperature, cooling water outlet temperature, main machine evaporation temperature/evaporation pressure, main machine condensation temperature/condensation pressure, or main machine compressor suction temperature/exhaust temperature.
4. The air conditioner host increase/decrease control method according to claim 3, wherein the cooling/heating amount of each host is calculated at Q according to the calculation model0I, corresponding to the first operating power NiThe method comprises the following steps:
determining a value a corresponding to two parameters X and Y used in equation (1) according to equation (1) with the refrigeration/heating amount known;
determining a B value corresponding to the A value;
determining the first operating power based on equation (2), the X and Y parameters used, and the B value.
5. The air conditioner host increase and decrease control method according to claim 3, wherein the fitting coefficients A and B are sets of corresponding parameters obtained by fitting with fitting software.
6. An air conditioner host increase and decrease control device is characterized by comprising:
the model acquisition module is used for acquiring a calculation model of the refrigerating/heating capacity and the operating power of the host;
an actual load demand obtaining module for obtaining an actual load demand Q at the end of the air conditioner0；
A first calculation module for calculating the refrigerating/heating quantity of a single host as Q according to the calculation model0At/i, the corresponding first operating power NiWherein i is a natural number not equal to zero, and i is 1, 2, 3, …, T, and T is the total host number;
a second calculation module for calculating the first operating power N respectivelyiThe first total power consumed when the i host computers are started is obtained, and therefore T first total powers are obtained;
and the host number determining module is used for determining the number of the hosts corresponding to the minimum first total power in the T first total powers, namely the number of the actual hosts.
7. The air conditioner host controller according to claim 6, wherein the calculation model is expressed by the following equation:
Q＝Σ(An+2+An+1*Xn+An*Xn-1*Y+An-1*Xn-2*Y2+……+A2*X*Yn-1+A1*Yn)
formula (1)
N＝Σ(Bn+2+Bn+1*Xn+Bn*Xn-1*Y+Bn-1*Xn-2*Y2+……+B2*X*Yn-1+B1*Yn)
Formula (2)
Wherein,
q is refrigeration/heating capacity;
n is the running power;
n is a natural number not equal to zero;
a and B are fitting coefficients;
x and Y are performance parameters of the main machine, and are any two parameters of chilled water inlet temperature, chilled water outlet temperature, cooling water inlet temperature, cooling water outlet temperature, main machine evaporation temperature/evaporation pressure, main machine condensation temperature/condensation pressure, or main machine compressor suction temperature/exhaust temperature.
8. The air conditioner host computer increase and decrease control device according to claim 7, wherein the first calculation module comprises:
a first processing module for determining a value A corresponding to two parameters of X and Y used in the formula (1) according to the formula (1) under the condition that the refrigerating/heating quantity is known;
the second processing module is used for determining a B value corresponding to the A value;
and the third processing module is used for determining the first operating power according to the formula (2), the used X and Y parameters and the B value.
9. The air conditioner host increase/decrease machine control device according to claim 7, wherein the fitting coefficients A and B are sets of corresponding parameters fitted by fitting software.
10. An air conditioning system, characterized by comprising the air conditioner host increase and decrease control device of any one of claims 5 to 9.
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| CN106642545A (en) * | 2016-11-29 | 2017-05-10 | 珠海格力电器股份有限公司 | Control method and device for air conditioning unit load |
| CN107120779A (en) * | 2016-02-24 | 2017-09-01 | 珠海格力电器股份有限公司 | Control method and device of air conditioner group control system |
| CN107606730A (en) * | 2017-09-29 | 2018-01-19 | 北京百度网讯科技有限公司 | Method and apparatus for determining the handpiece Water Chilling Units to data center's refrigeration |
| CN108488969A (en) * | 2018-03-23 | 2018-09-04 | 北京百度网讯科技有限公司 | Control method and control device for handpiece Water Chilling Units |
| CN108917103A (en) * | 2018-05-03 | 2018-11-30 | 广东美的暖通设备有限公司 | The cold water main unit control method of central air conditioner system, apparatus and system |
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