CN110220253A - A kind of Investigation of Cold Storage Centralized Air Conditioning Systems and its operation method - Google Patents
A kind of Investigation of Cold Storage Centralized Air Conditioning Systems and its operation method Download PDFInfo
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000011835 investigation Methods 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 153
- 238000005057 refrigeration Methods 0.000 claims abstract description 32
- 239000000498 cooling water Substances 0.000 claims abstract description 13
- 239000012782 phase change material Substances 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims description 41
- 230000005496 eutectics Effects 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 238000011017 operating method Methods 0.000 abstract description 5
- 230000008859 change Effects 0.000 description 13
- 239000003507 refrigerant Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- 239000011232 storage material Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000007704 transition 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
- F24F11/62—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
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/044—Systems in which all treatment is given in the central station, i.e. all-air systems
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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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
- F24F5/0021—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice using phase change material [PCM] for storage
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
本发明公开了一种蓄冷式中央空调系统及其运行方法，蓄冷式中央空调系统包括制冷机组、冷却水循环装置、冷冻水循环装置以及并联设置的第一蓄冷水池和第二蓄冷水池，第一蓄冷水池采用水蓄冷水池，第二蓄冷水池采用高温相变材料蓄冷水池，第一蓄冷水池中的低温水和所述第二蓄冷水池中的释冷水混合后通过换热器与空调冷冻水进行换热，使空调系统中的冷冻水能够完全满足中央空调系统的用水温度要求；同时，在同样蓄冷量的前提下，第二蓄冷水池并联第一蓄冷水池的蓄冷方式能够很好的避免了单独使用水蓄冷单元所造成的占用大量的建筑面积的问题，极大增加蓄冷系统的可行性及经济性。
The invention discloses a cool-storage central air-conditioning system and its operating method. The cool-storage central air-conditioning system includes a refrigeration unit, a cooling water circulation device, a chilled water circulation device, and a first cold storage pool and a second cold storage pool arranged in parallel. The first cold storage pool A water cold storage pool is adopted, and the second cold storage pool adopts a high-temperature phase-change material cold storage pool, and the low-temperature water in the first cold storage pool is mixed with the released cold water in the second cold storage pool to exchange heat with the chilled water of the air conditioner through a heat exchanger, The chilled water in the air-conditioning system can fully meet the water temperature requirements of the central air-conditioning system; at the same time, under the premise of the same cold storage capacity, the cold storage method of the second cold storage pool connected in parallel with the first cold storage pool can well avoid using water alone for cold storage The problem of occupying a large amount of building area caused by the unit greatly increases the feasibility and economy of the cold storage system.
Description
技术领域technical field
本发明涉及制冷技术领域，尤其涉及一种蓄冷式中央空调系统及其运行方法。The invention relates to the technical field of refrigeration, in particular to a cool-storage central air-conditioning system and an operating method thereof.
背景技术Background technique
蓄冷技术是提高能源利用效率，降低设备使用成本的重要技术，可用于解决能量供给与需求失配的矛盾，在电力“移峰填谷”以及工业与民用建筑和空调的节能等领域具有广泛的应用前景，是世界范围内的研究热点，目前的中央空调系统中便大量使用这一技术。Cold storage technology is an important technology to improve energy utilization efficiency and reduce equipment cost. It can be used to solve the contradiction between energy supply and demand mismatch. The application prospect is a research hotspot in the world, and this technology is widely used in the current central air-conditioning system.
现有的中央空调系统一般是采用单一的蓄冷方式，即水蓄冷或冰蓄冷或相变蓄冷单独使用，然而单独采用某一种蓄冷方式又有着各自的局限性，比如:水蓄冷的方式占用的体积大；相变蓄冷的方式因兼有水蓄冷能效高和冰蓄冷蓄冷密度大的优点，应用非常广阔，但常见的空调系统的进水温度为7℃，最理想的相变温度应是6℃，共晶盐作为常见的相变材料因蓄冷放冷的特性决定了其相变温度为7℃到8℃，相变蓄冷便又存在着不能完全满足中央空调系统用水温度的问题。因此使用单一的蓄冷方式难以满足各种因素下的可行性，有着一定的局限性。Existing central air-conditioning systems generally adopt a single cold storage method, that is, water cold storage, ice cold storage or phase change cold storage are used alone. However, a single cold storage method has its own limitations, such as: water cold storage. Large volume; the method of phase change cold storage has the advantages of high energy efficiency of water cold storage and high density of ice storage cold storage, so it is widely used. However, the inlet water temperature of common air conditioning systems is 7°C, and the ideal phase change temperature should be 6°C. ℃, as a common phase change material, eutectic salt has a phase change temperature of 7°C to 8°C due to the characteristics of cold storage and cooling, and there is a problem that the phase change cold storage cannot fully meet the water temperature of the central air conditioning system. Therefore, the use of a single cold storage method is difficult to meet the feasibility of various factors, and has certain limitations.
发明内容Contents of the invention
本发明提出一种蓄冷式中央空调系统及其运行方法，以解决现有技术中单一的蓄冷方式难以满足各种因素下的中央空调系统使用的可行性的技术问题。The invention proposes a cold storage type central air-conditioning system and its operating method to solve the technical problem in the prior art that a single cold storage method is difficult to meet the feasibility of using the central air-conditioning system under various factors.
本发明提出一种蓄冷式中央空调系统，包括制冷机组、冷却水循环装置和冷冻水循环装置，还包括：并联设置的第一蓄冷水池和第二蓄冷水池，所述第一蓄冷水池中的低温水和所述第二蓄冷水池中的释冷水混合后通过用户侧换热器与空调冷冻水进行换热。The present invention proposes a cool-storage central air-conditioning system, which includes a refrigerating unit, a cooling water circulation device and a chilled water circulation device, and also includes: a first cold storage pool and a second cold storage pool arranged in parallel, the low-temperature water in the first cold storage pool and the The cooling water in the second cold storage pool is mixed to exchange heat with the chilled water of the air conditioner through the user-side heat exchanger.
所述第一蓄冷水池采用水蓄冷水池，所述第二蓄冷水池采用高温相变材料蓄冷水池。The first cold storage pool is a water cold storage pool, and the second cold storage pool is a high temperature phase change material cold storage pool.
所述高温相变材料为共晶盐, 所述共晶盐放置在装满第二蓄冷水池中的多个塑料容器中。The high-temperature phase change material is eutectic salt, and the eutectic salt is placed in multiple plastic containers filled with the second cold storage pool.
所述第一蓄冷水池和所述第二蓄冷水池同步运行，蓄冷量相等，液面高度设为一致。The first cold storage pool and the second cold storage pool operate synchronously, the cold storage capacity is equal, and the liquid level heights are set to be consistent.
所述第一蓄冷水池的蓄冷温度设定为4-5℃，所述第二蓄冷水池的蓄冷温度设定为7-8℃，混合后的水温小于等于6℃。The cold storage temperature of the first cold storage pool is set at 4-5°C, the cold storage temperature of the second cold storage pool is set at 7-8°C, and the mixed water temperature is less than or equal to 6°C.
所述换热器采用板式换热器，所述第一蓄冷水池中的低温水和所述第二蓄冷水池中的释冷水在管道中混合后进入板式换热器中与冷冻水换热。The heat exchanger adopts a plate heat exchanger, and the low-temperature water in the first cold storage tank and the released cold water in the second cold storage tank are mixed in the pipeline and then enter the plate heat exchanger to exchange heat with chilled water.
所述第一蓄冷水池和所述第二蓄冷水池与冷冻水循环装置之间设有电动调节阀。An electric regulating valve is provided between the first cold storage pool, the second cold storage pool and the chilled water circulation device.
一种蓄冷式中央空调系统的运行方法，包括以下运行模式：A method for operating a cold storage central air-conditioning system, comprising the following operating modes:
制冷主机单独供冷模式，第一蓄冷水池和第二蓄冷水池与冷冻水循环装置断开，冷冻水在水泵的带动下在制冷机组的蒸发器和用户侧换热器之间循环；In the cooling mode of the refrigeration unit alone, the first cold storage tank and the second cold storage tank are disconnected from the chilled water circulation device, and the chilled water is driven by the water pump to circulate between the evaporator of the refrigeration unit and the user-side heat exchanger;
蓄冷模式，所述冷冻水循环装置与第一蓄冷水池和第二蓄冷水池以及制冷机组的蒸发器连通，冷冻水在水泵的带动下在第一蓄冷水池和第二蓄冷水池中蓄冷；In cold storage mode, the chilled water circulation device communicates with the first cold storage pool, the second cold storage pool and the evaporator of the refrigeration unit, and the chilled water is driven by the water pump to store cold in the first cold storage pool and the second cold storage pool;
放冷模式，所述制冷机组不开，第一蓄冷水池和第二蓄冷水池通过所述换热器为冷冻水提供冷量，通过调节所述电动调节阀的开度，分别控制混水温度和进出水量平衡；In the cooling mode, the refrigerating unit is not turned on, the first cold storage tank and the second cold storage tank provide cooling capacity for the chilled water through the heat exchanger, and the mixed water temperature and temperature are respectively controlled by adjusting the opening degree of the electric control valve. Inlet and outlet water balance;
联合制冷模式，所述制冷机组开启，直接对用户侧供冷，同时第一蓄冷水池和第二蓄冷水池通过所述换热器为冷冻水提供冷量，每个水池进出水管设置的电动调节阀调节开度，分别控制混水温度和进出水量平衡。Combined refrigeration mode, the refrigeration unit is turned on to directly supply cooling to the user side, and at the same time, the first cold storage pool and the second cold storage pool provide cooling capacity for chilled water through the heat exchanger, and the electric regulating valve installed in the water inlet and outlet pipes of each pool Adjust the opening to control the mixing water temperature and the balance of water in and out respectively.
所述第一蓄冷水池和所述第二蓄冷水池同步运行，蓄冷量相等，液面高度设为一致。The first cold storage pool and the second cold storage pool operate synchronously, the cold storage capacity is equal, and the liquid level heights are set to be consistent.
所述第一蓄冷水池的蓄冷温度设定为4-5℃，所述第二蓄冷水池的蓄冷温度设定为7-8℃，混合后的水温小于等于6℃。The cold storage temperature of the first cold storage pool is set at 4-5°C, the cold storage temperature of the second cold storage pool is set at 7-8°C, and the mixed water temperature is less than or equal to 6°C.
与现有技术相比，本发明具有以下有益效果：本发明在常规的中央空调系统上增加了并联设置的第一蓄冷水池和第二蓄冷水池，使第一蓄冷水池中出水温度较低的低温水和第二蓄冷水池中出水温度较高的释冷水混合后通过换热器与进入到空调系统的水进行换热，使进入到空调系统中的水能够完全满足中央空调系统的用水温度；同时，在同样蓄冷量的前提下，第二蓄冷水池的蓄冷方式采用相变蓄冷，第一蓄冷水池的蓄冷方式采用水蓄冷，第二蓄冷水池并联第一蓄冷水池的蓄冷方式能够很好的避免了单独使用水蓄冷单元所造成的占用大量的建筑面积的问题，极大增加蓄冷系统的可行性及经济性。Compared with the prior art, the present invention has the following beneficial effects: the present invention adds a first cold storage pool and a second cold storage pool arranged in parallel on the conventional central air-conditioning system, so that the temperature of the outlet water in the first cold storage pool is lower and the temperature is lower. The water is mixed with the cooling water with a higher outlet temperature in the second cold storage pool, and then the heat is exchanged with the water entering the air-conditioning system through the heat exchanger, so that the water entering the air-conditioning system can fully meet the water temperature of the central air-conditioning system; at the same time , under the premise of the same cold storage capacity, the cold storage method of the second cold storage pool adopts phase change cold storage, the cold storage method of the first cold storage pool adopts water cold storage, and the cold storage method of the second cold storage pool connected in parallel with the first cold storage pool can well avoid The problem of occupying a large amount of building area caused by using the water cold storage unit alone greatly increases the feasibility and economy of the cold storage system.
附图说明Description of drawings
图1为本发明提出的蓄冷式中央空调系统的示意图；Fig. 1 is the schematic diagram of the cold storage type central air-conditioning system that the present invention proposes;
图2为图1所示的蓄冷式中央空调系统在制冷主机单独供冷模式下的运行示意图；Fig. 2 is a schematic diagram of the operation of the cold storage central air-conditioning system shown in Fig. 1 under the cooling mode of the cooling host alone;
图3为图1所示的蓄冷式中央空调系统在蓄冷模式下的运行示意图；Fig. 3 is a schematic diagram of the operation of the cold storage central air-conditioning system shown in Fig. 1 in the cold storage mode;
图4为图1所示的蓄冷式中央空调系统在放冷模式下的运行示意图；Fig. 4 is a schematic diagram of the operation of the cool-storage central air-conditioning system shown in Fig. 1 in the cooling mode;
图5为图1所示的蓄冷式中央空调系统在联合制冷模式下的运行示意图。Fig. 5 is a schematic diagram of the operation of the cold storage central air-conditioning system shown in Fig. 1 in a combined cooling mode.
具体实施方式Detailed ways
为了使本发明的目的、技术方案及优点更加清楚，以下结合附图和实施例对本发明进行详细的说明。应当理解，以下具体实施例仅用以解释本发明，并不对本发明构成限制。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the following specific examples are only used to explain the present invention, but not to limit the present invention.
图1是本发明提出的蓄冷式空调系统的示意图。该蓄冷式中央空调系统包括制冷机组、冷却水循环装置和冷冻水循环装置。在蓄冷式空调系统中还设置有蓄冷装置，蓄冷装置包括第一蓄冷水池1和第二蓄冷水池2，其中，第一蓄冷水池1和第二蓄冷水池2为并联设置。Fig. 1 is a schematic diagram of the cold storage air conditioning system proposed by the present invention. The cool-storage central air-conditioning system includes a refrigeration unit, a cooling water circulation device and a chilled water circulation device. A cold storage device is also provided in the cold storage air conditioning system, and the cold storage device includes a first cold storage pool 1 and a second cold storage pool 2, wherein the first cold storage pool 1 and the second cold storage pool 2 are arranged in parallel.
在一个实施例中，第一蓄冷水池1采用的是水蓄冷水池，第二蓄冷水池2采用高温相变材料蓄冷水池，第一、第二蓄冷水池并联后与换热器4的两端连接。第二蓄冷水池2分别接入进水管路和出水管路，其内填充了高温相变蓄冷材料。该实施例中，第二蓄冷水池内包括有均匀摆放的多个塑料容器，每个塑料容器内均放置有高温相变材料，高温相变材料采用共晶盐，共晶盐作为蓄冷介质，通过其自身的相变潜热进行蓄冷（共晶盐可以在较高的温度下进行相变）。当蓄冷时，与制冷机组蒸发器换热的冷冻水分别流入到第一蓄冷水池1和第二蓄冷水池2内进行蓄冷。当白天放冷时，第一蓄冷水池1中的储存的低温水直接被抽出、第二蓄冷水池2中的共晶盐融化吸热使第二蓄冷水池2中的水形成释冷水实现放冷过程，第一、第二蓄冷水池中的水在管道中混合后在换热器4中与冷冻水进行换热。In one embodiment, the first cold storage pool 1 is a water cold storage pool, the second cold storage pool 2 is a high temperature phase change material cold storage pool, and the first and second cold storage pools are connected in parallel to both ends of the heat exchanger 4 . The second cold storage pool 2 is respectively connected to the water inlet pipeline and the water outlet pipeline, and is filled with a high-temperature phase-change cold storage material. In this embodiment, the second cold storage pool includes a plurality of plastic containers placed evenly, and a high-temperature phase change material is placed in each plastic container. The high-temperature phase change material uses eutectic salt, and the eutectic salt is used as a cold storage medium. Cold storage through its own latent heat of phase change (eutectic salt can undergo phase change at higher temperatures). When storing cold, the chilled water that exchanges heat with the evaporator of the refrigeration unit flows into the first cold storage pool 1 and the second cold storage pool 2 respectively for cold storage. When cooling during the day, the low-temperature water stored in the first cold storage pool 1 is directly pumped out, and the eutectic salt in the second cold storage pool 2 melts to absorb heat so that the water in the second cold storage pool 2 forms cold water to realize the cooling process , the water in the first and second cold storage tanks is mixed in the pipeline and then exchanges heat with chilled water in the heat exchanger 4 .
因常见的空调系统末端水温7℃进12℃回，最理想的相变温度应是6℃，而根据相变材料的蓄冷放冷特性定的相变温度是7-8℃，所以高温相变材料的蓄冷水池相变温度难以满足中央空调系统用水温度。所以，本发明并联设置了第一蓄冷水池1和第二蓄冷水池2，第一蓄冷水池1的出水管路与第二蓄冷水池2的出水管路连接在混合进水管路3的一端上，进水管路3上设有第一泵体100，第一蓄冷水池1采用水蓄冷的方式，其放冷时的低温水的温度在4℃到5℃之间，使得第一蓄冷水池1流出的低温水与第二蓄冷水池2流出的释冷水在混合进水管路3中进行混合，混合后的冷冻水温达到理想中的温度6℃，混合进水管路3的另一端接入换热器4中，使6℃的冷冻水与进入空调系统中的12℃的水在换热器4中进行换热，换热后使空调系统的进水温度达到7℃后流入到空调末端设备中与室内空气进行换热。Because the water temperature at the end of the common air-conditioning system is 7°C and goes back to 12°C, the ideal phase change temperature should be 6°C, and the phase change temperature determined according to the cold storage and cooling characteristics of the phase change material is 7-8°C, so high temperature phase change The phase change temperature of the cold storage pool of the material is difficult to meet the water temperature of the central air-conditioning system. Therefore, the present invention sets the first cold storage pool 1 and the second cold storage pool 2 in parallel, and the water outlet pipeline of the first cold storage pool 1 and the water outlet pipeline of the second cold storage pool 2 are connected on one end of the mixed water inlet pipeline 3, and then The water pipeline 3 is provided with a first pump body 100, and the first cold storage pool 1 adopts the method of water cold storage, and the temperature of the low-temperature water when it is cooled is between 4°C and 5°C, so that the low temperature flowing out of the first cold storage pool 1 The water is mixed with the cooling water flowing out of the second cold storage tank 2 in the mixing water inlet pipe 3, and the temperature of the mixed frozen water reaches the ideal temperature of 6°C, and the other end of the mixing water inlet pipe 3 is connected to the heat exchanger 4, The chilled water at 6°C exchanges heat with the water at 12°C entering the air conditioning system in the heat exchanger 4. After the heat exchange, the water entering the air conditioning system reaches a temperature of 7°C and then flows into the air conditioning terminal equipment to communicate with the indoor air. heat exchange.
优选地，换热器4采用板式换热器。Preferably, the heat exchanger 4 is a plate heat exchanger.
进一步地，在第一蓄冷水池1和第二蓄冷水池2与冷冻水循环管道之间还设有电动调节阀5。具体地：在连接第一蓄冷水池1的出水管路和进水管路上均设有电动调节阀5，在连接第二蓄冷水池2的出水管路和进水管路上亦均设有电动调节阀5；换热器4设有混合出水管路7，冷冻水流出换热器4后经混合出水管路7流回第一蓄冷水池1和第二蓄冷水池2。Further, an electric regulating valve 5 is also provided between the first cold storage pool 1 and the second cold storage pool 2 and the chilled water circulation pipeline. Specifically: an electric regulating valve 5 is provided on the water outlet pipeline and the water inlet pipeline connected to the first cold storage pool 1, and an electric regulating valve 5 is also provided on the water outlet pipeline and the water inlet pipeline connected to the second cold storage pool 2; The heat exchanger 4 is provided with a mixing outlet pipeline 7 , and the chilled water flows out of the heat exchanger 4 and flows back to the first cold storage pool 1 and the second cold storage pool 2 through the mixing outlet pipeline 7 .
同时，在连通于制冷机组9的空调出水管路上设有电动阀V1和第二泵体200，在连通于制冷机组9的空调进水管路上设有电动阀V2；在连通于制冷机组9的蓄水池出水管路上设有电动阀V3，在连通于制冷机组9的蓄水池进水管路上设有电动阀V4。At the same time, an electric valve V1 and a second pump body 200 are provided on the air-conditioning water outlet pipeline connected to the refrigeration unit 9, and an electric valve V2 is provided on the air-conditioning water inlet pipeline connected to the refrigeration unit 9; An electric valve V3 is arranged on the water outlet pipeline of the pool, and an electric valve V4 is arranged on the water inlet pipeline of the reservoir connected to the refrigerating unit 9 .
本发明提出的蓄冷式中央空调系统有效地实现了电量的移峰填谷，极大的降低了使用成本，其运行方法包括以下几种运行模式：The cold-storage central air-conditioning system proposed by the present invention effectively realizes peak-shifting and valley-filling of electric power, greatly reduces the cost of use, and its operating method includes the following operating modes:
制冷主机单独供冷模式，如图2所示，此时关闭制冷机组9与蓄冷池连接的电动阀V3和电动阀V4，开启制冷机组9与用户侧连接（即空调出水管路与空调进水管路连接）的电动阀V1、电动阀V2和第二泵体200，开启制冷机组9和冷却水循环装置，此时，从空调出水端10流出的水温12℃的水直接进入制冷机组9进行换热，冷却塔8中流出的冷却水在第三泵体300的带动下进入冷凝器进行换热，将流入冷凝器中的高温高压的气体冷媒转换为高压中温的液体冷媒，高压中温的液体冷媒经过膨胀阀变成低温低压的冷媒，低温低压的冷媒在蒸发器中与空调冷冻水进行换热，使从空调出水端10流出的水温12℃的水温度降低至7℃的冷冻水流入到空调进水端11，7℃的冷冻水通过管道流至室内空调末端设备与室内空气进行换热。The refrigeration unit is in the cooling mode alone, as shown in Figure 2. At this time, the electric valve V3 and electric valve V4 connecting the refrigeration unit 9 to the cold storage tank are closed, and the refrigeration unit 9 is connected to the user side (that is, the air-conditioning water outlet pipe and the air-conditioning water inlet pipe). circuit connection) electric valve V1, electric valve V2 and the second pump body 200, turn on the refrigeration unit 9 and the cooling water circulation device, at this time, the water with a water temperature of 12°C flowing out of the air conditioner outlet 10 directly enters the refrigeration unit 9 for heat exchange , the cooling water flowing out of the cooling tower 8 is driven by the third pump body 300 into the condenser for heat exchange, and the high-temperature and high-pressure gas refrigerant flowing into the condenser is converted into a high-pressure and medium-temperature liquid refrigerant, and the high-pressure and medium-temperature liquid refrigerant passes through The expansion valve becomes a low-temperature and low-pressure refrigerant, and the low-temperature and low-pressure refrigerant exchanges heat with the air-conditioning chilled water in the evaporator, so that the water temperature of 12°C flowing out of the air-conditioning outlet 10 is reduced to 7°C and the chilled water flows into the air-conditioning inlet. At the water end 11, the chilled water at 7°C flows through the pipes to the indoor air-conditioning terminal equipment to exchange heat with the indoor air.
蓄冷模式，如图3所示，开启制冷机组9和冷却水循环装置，打开电动阀V3、电动阀V4和第四泵体400，关闭第一泵体100，冷却塔8中流出的冷却水在第三泵体300的带动下进入冷凝器进行换热，将流入冷凝器中的高温高压的气体冷媒转换为高压中温的液体冷媒，高压中温的液体冷媒经过膨胀阀变成低温低压的冷媒，此时，冷冻水从第一蓄冷水池1、第二蓄水池2直接流入到制冷机组9进行循环蓄冷，低温低压的冷媒在蒸发器中与从第一、第二蓄水池中流出的温度较高的冷冻水进行换热以到达为冷冻水温度降低的目的，换热后的低温冷冻水再回流到第一、第二蓄水池中进行循环直至完成蓄冷；Cold storage mode, as shown in Figure 3, turn on the refrigeration unit 9 and the cooling water circulation device, open the electric valve V3, electric valve V4 and the fourth pump body 400, close the first pump body 100, the cooling water flowing out of the cooling tower 8 Driven by the three-pump body 300, it enters the condenser for heat exchange, and converts the high-temperature and high-pressure gas refrigerant flowing into the condenser into a high-pressure and medium-temperature liquid refrigerant, and the high-pressure and medium-temperature liquid refrigerant passes through the expansion valve into a low-temperature and low-pressure refrigerant. , chilled water flows directly from the first cold storage tank 1 and the second storage tank 2 into the refrigeration unit 9 for circulating cold storage, and the temperature of the low-temperature and low-pressure refrigerant in the evaporator is higher than that flowing out of the first and second storage tanks The chilled water is used for heat exchange to achieve the purpose of reducing the temperature of the chilled water, and the low-temperature chilled water after heat exchange is returned to the first and second storage tanks for circulation until the cold storage is completed;
放冷模式，如图4所示，关闭制冷机组9，开启第一泵体100，关闭电动阀V1、电动阀V2、电动阀V3和电动阀V4，此时，第一蓄冷水池1流出的温度为4度左右的低温水与第二蓄冷水池2流出的温度为7-8度左右的释冷水在管路3中进行混合，分别调节第一蓄冷水池1和第二蓄水池2的出水管路上的电动调节阀5，分别调节第一蓄冷水池1和第二蓄水池2的出水管路上的电动调节阀5的开度，使混合进水管路3中的混合后的水温达到设定的6℃，混合后的水进入到换热器4中，与冷冻水进行换热，换热后的冷冻水在空调进水端11的进水温度达到7℃，而放冷后的水回流到并联设置的第一蓄冷水池1和第二蓄冷水池2中再进行循环，在第二蓄水池2的进水管路和出水管路上还设有流量计6，通过调节第二蓄水池2的进水管路上的电动调节阀5的开度使流量计6的读数一致，从而确保第一蓄冷水池1的进水量和出水量保持平衡，同时也确保了第二蓄水池2的进水量和出水量能够保持平衡；In the cooling mode, as shown in Figure 4, the refrigeration unit 9 is turned off, the first pump body 100 is turned on, and the electric valve V1, electric valve V2, electric valve V3 and electric valve V4 are closed. The low-temperature water with a temperature of about 4 degrees is mixed with the released cold water with a temperature of about 7-8 degrees from the second cold storage tank 2 in the pipeline 3, and the outlet pipes of the first cold storage tank 1 and the second storage tank 2 are adjusted respectively. The electric regulating valve 5 on the road adjusts the opening of the electric regulating valve 5 on the outlet pipelines of the first cold storage tank 1 and the second storage tank 2 respectively, so that the mixed water temperature in the mixed water inlet pipeline 3 reaches the set value. 6°C, the mixed water enters the heat exchanger 4, and exchanges heat with the chilled water. The temperature of the chilled water after heat exchange reaches 7°C at the water inlet end 11 of the air conditioner, and the cooled water flows back to The first cold storage tank 1 and the second cold storage tank 2 which are arranged in parallel circulate again, and a flow meter 6 is also arranged on the water inlet pipeline and the outlet pipeline of the second storage tank 2. By adjusting the flow rate of the second storage tank 2 The opening of the electric regulating valve 5 on the water inlet pipe makes the readings of the flowmeter 6 consistent, thereby ensuring that the water inlet and outlet of the first cold storage tank 1 are kept in balance, and at the same time, the water inlet and outlet of the second storage tank 2 are also ensured. The amount of water can be kept in balance;
联合制冷模式，联合制冷模式同时使用到了蓄冷水池供冷与常规的制冷主机供冷，如图5所示，关闭与蓄冷池连接的电动阀V3和电动阀V4，开启与用户侧（即空调出水管路与空调进水管路）连接的电动阀V1、电动阀V2和第二泵体200，开启制冷机组9和冷却水循环装置,空调出水端10流出的水进入制冷机组9进行换热，此换热过程与上述制冷主机单独供冷模式一样，因此不再赘述；同时，开启第一泵体100，空调出水端10流出的水可同时进入到换热器4中，经过蓄冷之后的第一、第二蓄水池中的冷冻水流入到换热器4中与空调出水端10流出的水进行换热，其换热过程与上述放冷模式一致，因此不再赘述。Combined refrigeration mode, the combined refrigeration mode uses the cold storage pool for cooling and the conventional refrigeration host for cooling. As shown in Figure 5, close the electric valve V3 and electric valve V4 connected to the cold storage The electric valve V1, the electric valve V2 and the second pump body 200 connected to the water pipeline and the air-conditioning water inlet pipeline) turn on the refrigeration unit 9 and the cooling water circulation device, and the water flowing out of the air-conditioning water outlet 10 enters the refrigeration unit 9 for heat exchange. The heat process is the same as the above-mentioned cooling mode of the main unit alone, so it will not be described in detail; at the same time, the first pump body 100 is turned on, and the water flowing out of the air conditioner water outlet 10 can enter the heat exchanger 4 at the same time. The chilled water in the second storage tank flows into the heat exchanger 4 to exchange heat with the water flowing out of the air conditioner water outlet 10. The heat exchange process is consistent with the above-mentioned cooling mode, so it will not be described again.
本发明提出的蓄冷式中央空调系统，在夜晚时，开启蓄冷模式，将冷量提前储存在蓄冷水池中；当白天需要放冷时，开启放冷模式，将蓄冷水池中储存的冷量放出；当蓄冷水池中的冷量用尽时，则开启制冷主机单独供冷模式，此时空调系统在按常规状态下运作；因大多数场合，蓄冷量并不能全部满足白天的需求，提供了联合制冷模式，同时使用到蓄冷水池供冷与常规的制冷主机供冷的供冷方式，主机和放冷的输出量分配根据全天用量、各时段的电价等因素进行运行策划和控制，总原则是峰期电价时段多用放冷，平期电价时段多用主机，不但有利于降低使用成本，还保证了供冷的多样性，降低了单一供冷模式下发生故障而产生的一系列问题，保证了制冷效果；当蓄冷水池中的冷量用尽时，则开启制冷主机单独供冷模式，此时空调系统在按常规状态下运作。The cold storage type central air-conditioning system proposed by the present invention turns on the cold storage mode at night, and stores the cooling capacity in the cold storage pool in advance; when cooling is required during the day, turns on the cooling mode, and releases the cold capacity stored in the cold storage pool; When the cooling capacity in the cold storage pool is exhausted, the refrigeration main unit is turned on for cooling alone, and the air conditioning system operates in a normal state at this time; because in most cases, the cold storage capacity cannot fully meet the needs of the day, a combined cooling system is provided. In this mode, the cold storage tank and the conventional refrigeration main engine are used for cooling at the same time. The output distribution of the main engine and cooling is planned and controlled according to factors such as the consumption of the whole day and the electricity price at each time period. The general principle is peak Cooling is often used during regular electricity price periods, and mainframes are used more during normal electricity price periods, which not only helps to reduce the cost of use, but also ensures the diversity of cooling, reduces a series of problems caused by failures in a single cooling mode, and ensures the cooling effect ; When the cooling capacity in the cold storage pool is exhausted, the refrigeration main unit is turned on for cooling alone, and the air-conditioning system is operating in a normal state.
由于夜间的电价相比白天低、夜间的用电负荷较小等因素，因此本发明中的空调系统可以通过调整空调系统的不同运行方法，实现电量的“移峰填谷”，降低了使用成本。Because the electricity price at night is lower than that during the day, and the electricity load at night is smaller, the air conditioning system in the present invention can achieve “peak shifting and valley filling” of electricity by adjusting different operating methods of the air conditioning system, reducing the cost of use .
需要注意的是：为了使第一蓄冷水池1和第二蓄冷水池2完全同步，即蓄冷放冷需同时完成，本实施例中将第一蓄冷水池1和第二蓄冷水池2的蓄冷量设置为相等的，而在常规空调系统运用中高温相变蓄冷的密度是水蓄冷的5倍，所以第一蓄冷水池1的体积应为第二蓄冷水池2的5倍，它们的液面高度应设为一致。且目前常用的共晶盐的相变温度（释冷水的温度）是7℃至8℃，因此，将第一蓄冷水池1的蓄冷温度（低温水的温度）设定为4℃至5℃之间，以将混合进水管路3中的混合水温调整为小于等于6℃。It should be noted that: in order to make the first cold storage pool 1 and the second cold storage pool 2 fully synchronized, that is, cold storage and cooling must be completed at the same time, in this embodiment, the cold storage capacity of the first cold storage pool 1 and the second cold storage pool 2 is set as Equal, while the density of high-temperature phase-change cold storage in the use of conventional air-conditioning systems is 5 times that of water cold storage, so the volume of the first cold storage pool 1 should be 5 times that of the second cold storage pool 2, and their liquid level should be set to unanimous. And the phase transition temperature (temperature of releasing cold water) of commonly used eutectic salt is 7°C to 8°C, therefore, the cold storage temperature (temperature of low temperature water) of the first cold storage pool 1 is set between 4°C and 5°C In order to adjust the temperature of the mixed water in the mixed water inlet line 3 to be less than or equal to 6°C.
通过并联设置的第一蓄冷水池1和第二蓄冷水池2，第一蓄冷水池1中出水温度较低的低温水和第二蓄冷水池2中出水温度较高的释冷水混合后通过换热器与进入到空调系统的水进行换热，使进入到空调系统中的水能够完全满足中央空调系统的用水温度；同时，在同样蓄冷量的前提下，第二蓄冷水池2的蓄冷方式采用相变蓄冷，第一蓄冷水池1的蓄冷方式采用水蓄冷，第二蓄冷水池2并联第一蓄冷水池1的蓄冷方式能够很好的避免了单独使用水蓄冷单元所造成的占用大量的建筑面积的问题，极大增加蓄冷系统的可行性及经济性。Through the first cold storage pool 1 and the second cold storage pool 2 arranged in parallel, the low-temperature water with a lower outlet temperature in the first cold storage pool 1 and the released cold water with a higher outlet temperature in the second cold storage pool 2 are mixed and passed through the heat exchanger and The water entering the air-conditioning system performs heat exchange, so that the water entering the air-conditioning system can fully meet the water temperature of the central air-conditioning system; at the same time, under the premise of the same cold storage capacity, the cold storage method of the second cold storage pool 2 adopts phase change cold storage The cold storage method of the first cold storage pool 1 adopts water cold storage, and the cold storage method of the second cold storage pool 2 connected in parallel with the first cold storage pool 1 can well avoid the problem of occupying a large amount of building area caused by using water cold storage units alone, which is extremely Greatly increase the feasibility and economy of the cold storage system.
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和变化，这些变形和变化都属于本发明的保护范围。The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be noted that those skilled in the art can make several modifications and changes without departing from the concept of the present invention, and these modifications and changes all belong to the protection scope of the present invention.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114867299A (en) * | 2022-04-28 | 2022-08-05 | 东南大学 | Data machine room cold accumulation system and method capable of being used as emergency |
| CN114893838A (en) * | 2022-06-15 | 2022-08-12 | 珠海格力电器股份有限公司 | Cooling device, control method thereof, controller, cooling system and storage medium |
| CN116817539A (en) * | 2023-06-25 | 2023-09-29 | 通威微电子有限公司 | A cooling water cooling system and cooling system control method in a silicon carbide production workshop |
| CN119164029A (en) * | 2024-11-19 | 2024-12-20 | 杭州华电华源环境工程有限公司 | A hybrid energy storage air conditioning system of ice storage and water storage and a control method thereof |
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| CN116817539A (en) * | 2023-06-25 | 2023-09-29 | 通威微电子有限公司 | A cooling water cooling system and cooling system control method in a silicon carbide production workshop |
| CN119164029A (en) * | 2024-11-19 | 2024-12-20 | 杭州华电华源环境工程有限公司 | A hybrid energy storage air conditioning system of ice storage and water storage and a control method thereof |
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