A system and method for realizing water-cooling joint supply using temperature-stratified reservoir source water

Abstract

The present invention belongs to the technical field of cooling and water supply, and proposes a system and method for realizing water-cooling joint supply by utilizing temperature-stratified reservoir source water. In the present invention, water supply is realized by multiple water inlet pipes at different depths of the reservoir, and the bottom water of the reservoir can be used as a cold source to realize efficient operation of the refrigeration unit, thereby greatly reducing the energy consumption of air-conditioning operation; the water inlet end pipeline of the water treatment system passes through the cold end of an energy recovery device, and the water outlet end pipeline passes through the hot end of the energy recovery device, and the residual pressure energy of water transmission can be used to drive the circulation water to flow, thereby saving electric energy. At the same time, the water inlet pipe and the water outlet pipe of the water treatment system pass through the energy recovery device, thereby improving the utilization rate of the source water cooling energy; the water outlet end pipeline of the water treatment system passes through the energy recovery device and then passes through the cold end of a plate heat exchanger, and the circulation pipe of the refrigeration unit passes through the hot end of the plate heat exchanger, thereby realizing the cold energy supply to the refrigeration unit, without the need to install a cooling tower, thereby improving the urban heat island effect and saving water resources.

Description

Technical Field

[0001] The invention belongs to the technical field of cooling and water supply, and in particular relates to a system and method for realizing water-cooling joint supply by utilizing temperature-stratified reservoir source water. Background Art

[0002] In recent years, some areas have seen an increase in summer heat waves, which will become the world's deadliest heat wave zones. Continuous high temperatures have caused urban electricity consumption to exceed the limit again and again, and many cities have experienced power outages to varying degrees, seriously affecting residents' lives. At the same time, the sharp increase in energy consumption for building air conditioning has exacerbated the "urban heat island effect". In the current energy shortage, reducing the energy consumption of air conditioning systems has become a top priority, and cold sources have a greater impact on the energy efficiency of refrigeration units. How to reasonably select and utilize local cold sources to improve the energy efficiency of refrigeration units, reduce the energy consumption of air conditioning operations, and improve the urban "heat island effect" is an important topic worthy of in-depth discussion and research.

[0003] The inventors found that in most regional cooling systems, water is the main part of the cold source, and the nearby water source becomes the key to the operation of the cooling system. At present, cities such as Copenhagen, Toronto and Helsinki, which are relatively successful in using water sources for cooling, have climatic conditions so that the temperature of the nearby water sources is not too high. Cold water is transported to the urban area during the day, and the hot water output through the pipeline circulating water is stored in the city’s reservoir, and then cooled at night. The cooling system is highly efficient and can reduce 75% of air-conditioning energy consumption. This method has a small supply and return water temperature difference of cold water, a large amount of cold water is transported, and the pump consumption is high. In addition, it is heavily dependent on local water sources. For some cities, especially central urban areas with large air-conditioning needs, they are usually far away from surface water sources, which makes water extraction energy consumption large and costly, making it difficult to promote and apply. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a system and method for realizing water-cooling co-supply using temperature-stratified reservoir source water. In view of the high energy consumption of air-conditioning operation in cities in summer and the prominent urban heat island effect, a system and method for realizing water-cooling co-supply using temperature-stratified reservoir source water are proposed, which significantly reduces the refrigeration energy consumption, saves water resources and improves the urban heat island effect.

[0005] In order to achieve the above-mentioned purpose, in a first aspect, the present invention provides a system for realizing water-cooling and co-supply using temperature-stratified reservoir source water, which adopts the following technical scheme:

[0006] A system for realizing water-cooling co-supply using temperature-stratified reservoir source water, comprising:

[0007] Multiple water inlet pipes are distributed at different depths of the reservoir, valves are installed on each of the multiple water inlet pipes, and the multiple water inlet pipes are connected in parallel to the same raw water delivery pipe;

[0008] A water treatment system, the water inlet end of which is connected to the water outlet end of the raw water delivery pipe;

[0009] An energy recovery device, wherein the water inlet pipe of the water treatment system passes through the cold end of the energy recovery device, and the water outlet pipe passes through the hot end of the energy recovery device;

[0010] A plate heat exchanger, wherein the water outlet pipe of the water treatment system passes through the hot end of the energy recovery device and then passes through the cold end of the plate heat exchanger;

[0011] A refrigeration unit, whose circulation pipeline passes through the hot end of the plate heat exchanger;

[0012] An air conditioning device is connected to the refrigeration unit.

[0013] Furthermore, a raw water delivery pump is installed on the raw water delivery pipe.

[0014] Furthermore, the water inlet pipe of the water treatment system includes two pipes in parallel, one pipe is directly connected to the raw water pipe, and the other pipe is connected to the raw water pipe after passing through the cold end of the energy recovery device; a fourth valve is installed on the pipe directly connected to the raw water pipe, and a sixth valve is installed on the other pipe.

[0015] Furthermore, the water treatment system includes a water distribution well connected to the raw water delivery pipe and a water treatment device connected to the water distribution well through a water distribution well outlet pipe.

[0016] Furthermore, the outlet pipe of the water treatment facility of the water treatment device is divided into two pipes, one pipe is connected to the clear water tank, and the other pipe passes through the hot end of the energy recovery device and then passes through the cold end of the plate heat exchanger; a fifth valve is installed on the pipe connected to the clear water tank, and a seventh valve is installed on the other pipe.

[0017] Furthermore, the water outlet of the pipe passing through the hot end of the energy recovery device and then the cold end of the plate heat exchanger is connected to the water inlet of the clean water tank; the water outlet of the clean water tank is connected to a water supply pipe, and a water supply pump is installed on the water supply pipe.

[0018] Furthermore, the refrigeration unit includes a plurality of plates connected in series, and a cooling water circulation pump is installed on the pipeline entering the hot end of the plate heat exchanger.

[0019] Furthermore, the circulation pipeline in the air-conditioning device passes through the cold end of the refrigeration unit.

[0020] Furthermore, a chilled water circulation pump is installed on the circulation pipeline in the air-conditioning device.

[0021] In order to achieve the above-mentioned purpose, in a second aspect, the present invention also provides a method for realizing water-cooling co-supply using temperature-stratified reservoir source water, which adopts the following technical scheme:

[0022] A method for realizing water-cooling co-supply using temperature-stratified reservoir source water, using the system for realizing water-cooling co-supply using reservoir source water as described in the first aspect, comprising:

[0023] Open the valve on the deepest water inlet pipe among the multiple water inlet pipes, close the valves on the other water inlet pipes and close the fourth valve and the fifth valve, and open the sixth valve and the seventh valve; driven by the raw water delivery pump, the water from the bottom of the reservoir enters the energy recovery device through the raw water delivery pipe, drives the clean water from the water treatment device into the plate heat exchanger, and the clean water entering the plate heat exchanger exchanges heat with the refrigeration unit. The heated clean water enters the clean water tank, and the water supply pump draws the clean water in the clean water tank to supply water to residents through the water supply pipe;

[0024] In the plate heat exchanger, the circulating cooling water return water releases the heat absorbed from the condenser of the refrigeration unit into the clean water, the water temperature decreases, and enters the condensers of multiple refrigeration units in sequence through the circulating cooling water supply pipe and the circulating cooling water inlet pipe, absorbs the heat on the chilled water side, the water temperature increases, and driven by the cooling water circulation pump, returns to the plate heat exchanger through the circulating cooling water outlet pipe and the circulating cooling water return pipe, and circulates;

[0025] Driven by the chilled water circulation pump, the return water from the air-conditioning unit enters the evaporators of multiple refrigeration units through the chilled water return pipe for cooling. After cooling, it returns to the air-conditioning unit through the chilled water supply pipe for cooling.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. In the present invention, water supply is realized through multiple water inlet pipes at different depths of the reservoir, and the bottom water of the reservoir can be used as a cold source to realize efficient operation of the refrigeration unit, thereby greatly reducing the energy consumption of air-conditioning operation; the water inlet pipe of the water treatment system passes through the cold end of the energy recovery device, and the water outlet pipe passes through the hot end of the energy recovery device, and the residual pressure energy of water delivery can be used to drive the circulation water to flow, thereby saving electric energy. At the same time, the water inlet pipe and the water outlet pipe of the water treatment system pass through the energy recovery device, thereby improving the utilization rate of the source water cooling energy; the water outlet pipe of the water treatment system passes through the energy recovery device and then passes through the cold end of the plate heat exchanger, and the circulation pipe of the refrigeration unit passes through the hot end of the plate heat exchanger to realize the cold energy supply to the refrigeration unit, and the refrigeration unit is connected to the air-conditioning device to realize water-cooling joint supply, and the water supply and cooling supply share a set of water pipes, without the need to install a cooling tower, thereby improving the urban heat island effect and saving water resources.

[0028] 2. The refrigeration unit in the present invention adopts a multi-stage series connection form to achieve large temperature difference operation of circulating cooling water, reduce transmission energy consumption, and improve cooling capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0030] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0031] Among them, 1. Temperature stratified reservoir; 2. Energy recovery device; 3. Water distribution well; 4. Water treatment device; 5. Clear water tank; 6. Plate heat exchanger; 7. First refrigeration unit; 8. Second refrigeration unit; 9. Third refrigeration unit; 10. Air conditioning device; P1. Raw water delivery pump; P2. Water supply pump; P3. Cooling water circulation pump; P4. Chilled water circulation pump; L1. Raw water delivery pipe; L2. Water distribution well outlet pipe; L3. Water treatment facility outlet pipe; L4. Water supply pipe; L5. Circulating cooling water supply pipe; L6. Circulating cooling water return pipe; L7. Circulating cooling water inlet pipe; L8. Circulating cooling water outlet pipe; L9. Chilled water supply pipe; L10. Chilled water return pipe; V1. First valve; V2. Second valve; V3. Third valve; V4. Fourth valve; V5. Fifth valve; V6. Sixth valve. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0034] Embodiment 1:

[0035] like Figure 1As shown, this embodiment provides a system for realizing water-cooling co-supply using temperature-stratified reservoir source water, including a reservoir 1, an energy recovery device 2, a water distribution well 3, a water treatment device 4, a clear water tank 5, a plate heat exchanger 6, a first refrigeration unit 7, a second refrigeration unit 8, a third refrigeration unit 9, an air conditioning device 10, a raw water delivery pump P1, a water supply pump P2, a cooling water circulation pump P3, a chilled water circulation pump P4, a raw water delivery pipe L1, a water distribution well outlet pipe L2, a water treatment facility outlet pipe L3, a water supply pipe L4, a circulating cooling water supply pipe L5, a circulating cooling water return pipe L6, a circulating cooling water inlet pipe L7, a circulating cooling water outlet pipe L8, a chilled water supply pipe L9, a chilled water return pipe L10, a first valve V1, a second valve V2, a third valve V3, a fourth valve V4, a fifth valve V5 and a sixth valve V6;

[0036] The water supply part includes a plurality of water inlet pipes distributed at different depths of the temperature stratified reservoir 1, and valves are installed on the plurality of water inlet pipes respectively. The plurality of water inlet pipes are connected in parallel to the same raw water delivery pipe L1; in this embodiment, the temperature stratified reservoir has no endogenous pollution, and the temperature stratified reservoir adopts a stratified water intake method, and water is taken from the bottom layer in summer, and the water temperature can generally reach 8°C~12°C; the water inlet pipes can be set to 3, which are respectively arranged at the upper end, middle end and lower end of the reservoir 1;

[0037] The water-cooling and cogeneration system of this embodiment is provided with a water treatment system, and the water inlet end of the water treatment system is connected to the water outlet end of the raw water delivery pipe L1;

[0038] The water inlet pipe of the water treatment system passes through the cold end of the energy recovery device 2, and the water outlet pipe passes through the hot end of the energy recovery device 2; in this embodiment, the energy recovery device 2 can be set as a conventional device such as a heat exchanger, which can realize the exchange of cold energy and heat energy in the convection pipe; during the recovery process of the energy recovery device 2, the residual pressure energy of the water transmission can be used to drive the water outlet of the water treatment device 4 to circulate in the plate heat exchanger 6;

[0039] The water outlet pipe of the water treatment system passes through the hot end of the energy recovery device 2 and then passes through the cold end of the plate heat exchanger 6;

[0040] The first refrigeration unit 7, the second refrigeration unit 8 and the third refrigeration unit 9 are connected in series to form a refrigeration unit, and the circulation pipeline of the refrigeration unit passes through the hot end of the plate heat exchanger 6;

[0041] The air conditioning device 10 is connected to the refrigeration unit.

[0042] It should be noted that, in this embodiment, the cold end can be understood as the end of the material in the pipeline with a lower temperature, which serves as the cold energy providing end during operation; the hot end can be understood as the end of the material in the pipeline with a higher temperature, which serves as the cold energy receiving end during operation;

[0043] Specifically, in the present embodiment, water supply is realized in multiple water inlet pipes at different depths of the reservoir, and the bottom water of the reservoir can be used as the cold source to realize efficient operation of the refrigeration unit, thereby greatly reducing the energy consumption of air-conditioning operation; the water inlet pipe of the water treatment system passes through the cold end of the energy recovery device, and the water outlet pipe passes through the hot end of the energy recovery device, and the residual pressure energy of water transmission can be used to drive the circulation water to flow, thereby saving electric energy. At the same time, the water inlet pipe and the water outlet pipe of the water treatment system pass through the energy recovery device, thereby improving the utilization rate of the source water cooling energy; the water outlet pipe of the water treatment system passes through the energy recovery device and then passes through the cold end of the plate heat exchanger, and the circulation pipe of the refrigeration unit passes through the hot end of the plate heat exchanger to realize the supply of cold energy to the refrigeration unit, and the refrigeration unit is connected to the air-conditioning device to realize water-cooled joint supply, without the need to install a cooling tower, thereby improving the urban heat island effect and saving water resources.

[0044] A raw water delivery pump P1 is installed on the raw water delivery pipe L1, and the raw water delivery pump P1 is used to pump water from the Shuoshu reservoir 1 into the system.

[0045] The water inlet end pipeline of the water treatment system includes two parallel pipelines, one pipeline is directly connected to the raw water pipe L1, and the other pipeline is connected to the raw water pipe L1 after passing through the cold end of the energy recovery device 2; a fourth valve V4 is installed on the pipeline directly connected to the raw water pipe L1, and a sixth valve V6 is installed on the other pipeline; specifically, when the cold energy supply requirement is high, the fourth valve V4 is closed and the sixth valve V6 is opened, and the water source enters the energy recovery device 2 again after passing through the water treatment system, and absorbs the cold energy of the water source entering the energy recovery device 2 for the first time in the energy recovery device 2, thereby improving the utilization rate of cold energy and avoiding the loss of cold energy in the water treatment system.

[0046] The water treatment system may include a water distribution well 3 connected to the raw water delivery pipe L1 and a water treatment device 4 connected to the water distribution well 3 via a water distribution well outlet pipe L2; the water distribution well 3 may be used to distribute raw water. In sewage treatment, it is usually arranged after the grit chamber and before the biological treatment system. Its function is to collect sewage and reduce the impact of flow changes on the treatment system. After passing through the grit chamber, the sewage first flows to the water distribution well. After reaching a certain capacity, the sewage is evenly distributed to the next-level structure for treatment; the water treatment device 4 may be used for, but is not limited to, coagulation, sedimentation and filtration.

[0047] The water treatment facility outlet pipe L3 of the water treatment device 4 is divided into two pipes, one pipe is connected to the clean water tank 5, and the other pipe passes through the hot end of the energy recovery device 2 and then passes through the cold end of the plate heat exchanger 6; the fifth valve V5 is installed on the pipe connected to the clean water tank 5, and the seventh valve V7 is installed on the other pipe; specifically, when cooling is required, the fifth valve V5 is closed and the seventh valve V7 is opened to ensure that the water source enters the energy recovery device 2 and the plate heat exchanger 6; when cooling is not required, the fifth valve V5 is opened and the seventh valve V7 is closed, and the water source is directly discharged into the clean water tank 5 after passing through the water treatment system.

[0048] The water outlet of the pipe passing through the hot end of the energy recovery device 2 and then the cold end of the plate heat exchanger 6 is connected to the water inlet of the clean water tank 5; the water outlet of the clean water tank 5 is connected to a water supply pipe L4, and a water supply pump P2 is installed on the water supply pipe L4; specifically, the water supply pipe L4 provides clean water to users, and the water supply pump P2 provides power.

[0049] The refrigeration unit includes multiple refrigeration units connected in series, and a cooling water circulation pump is installed on the pipeline entering the hot end of the plate heat exchanger 6. The circulation pipeline in the air conditioning device 10 passes through the cold end of the refrigeration unit; the circulation pipeline in the air conditioning device 10 is installed with a chilled water circulation pump P4.

[0050] A working method or process of this embodiment is:

[0051] Close the second valve V2, the third valve V3, the fourth valve V4, the fifth valve V5, the eighth valve V8, the ninth valve V9 and the tenth valve V10, and open the first valve V1, the sixth valve V6 and the seventh valve V7. Driven by the raw water delivery pump P1, the bottom water source water of the reservoir 1 enters the energy recovery device 2 through the raw water delivery pipe L1, drives the clean water from the water treatment device 4 to enter the plate heat exchanger 6 to exchange heat with the first refrigeration unit 7, the second refrigeration unit 8 and the third refrigeration unit 9, and the heated clean water enters the clean water tank. The water supply pump P2 draws clean water from the clean water tank 5 and supplies water to residents through the water supply pipe L4.

[0052] The circulating cooling water return in the plate heat exchanger 6 releases the heat absorbed from the condensers of the first refrigeration unit 7, the second refrigeration unit 8 and the third refrigeration unit 9 into the clean water, and the water temperature decreases. The circulating cooling water supply pipe L5 and the circulating cooling water inlet pipe L7 successively enter the condensers of the first refrigeration unit 7, the second refrigeration unit 8 and the third refrigeration unit 9, absorb the heat on the chilled water side, and the water temperature increases. Driven by the cooling water circulation pump P3, the circulating cooling water outlet pipe L8 and the circulating cooling water return pipe L6 return to the plate heat exchanger 6 and circulate. The circulating cooling water supply pipe L5 and the circulating cooling water return pipe L6 can adopt the existing heating network or a newly built network.

[0053] Driven by the chilled water circulation pump P4, the return water from the air-conditioning device 10 enters the evaporators of the first refrigeration unit 7, the second refrigeration unit 8 and the third refrigeration unit 9 through the chilled water return pipe L10 for cooling, and after cooling, returns to the air-conditioning device 10 through the chilled water supply pipe L9 for cooling.

[0054] Embodiment 2:

[0055] This embodiment provides a method for realizing water-cooling and co-supply using temperature-stratified reservoir source water, and adopts the system for realizing water-cooling and co-supply using temperature-stratified reservoir source water as described in Example 1, including:

[0056] Open the valve on the deepest water inlet pipe among the multiple water inlet pipes, close the valves on the other water inlet pipes and close the fourth valve V4 and the fifth valve V5, and open the sixth valve V6 and the seventh valve V7; driven by the raw water delivery pump P1, the water from the bottom of the reservoir enters the energy recovery device 2 through the raw water delivery pipe L1, driving the clean water from the water treatment device 4 to enter the plate heat exchanger 6, the clean water entering the plate heat exchanger 6 exchanges heat with the refrigeration unit, and the heated clean water enters the clean water tank 5, and the water supply pump P2 draws the clean water in the clean water tank 5 to supply water to residents through the water supply pipe L4;

[0057] In the plate heat exchanger 6, the circulating cooling water return water releases the heat absorbed from the condenser of the refrigeration unit into the clean water, the water temperature decreases, and enters the condensers of multiple refrigeration units in sequence through the circulating cooling water supply pipe L5 and the circulating cooling water inlet pipe L7, absorbs the heat on the chilled water side, the water temperature increases, and under the drive of the cooling water circulation pump P3, returns to the plate heat exchanger 6 through the circulating cooling water outlet pipe L8 and the circulating cooling water return pipe L6, and circulates;

[0058] Driven by the chilled water circulation pump P4, the return water from the air-conditioning device 10 enters the evaporators of multiple refrigeration units through the chilled water return pipe L10 for cooling, and after cooling, returns to the air-conditioning device 10 through the chilled water supply pipe L9 for cooling.

[0059] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. A system for realizing water-cooling and co-supply using temperature-stratified reservoir source water, characterized in that: include: Multiple water inlet pipes are distributed at different depths of the temperature-stratified reservoir, valves are installed on the multiple water inlet pipes respectively, and the multiple water inlet pipes are connected in parallel to the same raw water delivery pipe; A water treatment system, the water inlet end of which is connected to the water outlet end of the raw water delivery pipe; An energy recovery device, wherein the water inlet pipe of the water treatment system passes through the cold end of the energy recovery device, and the water outlet pipe passes through the hot end of the energy recovery device; A plate heat exchanger, wherein the water outlet pipe of the water treatment system passes through the hot end of the energy recovery device and then passes through the cold end of the plate heat exchanger; A refrigeration unit, the circulation pipeline of which passes through the hot end of the plate heat exchanger; An air conditioning device connected to the refrigeration unit; The water inlet end pipeline of the water treatment system includes two parallel pipelines, one pipeline is directly connected to the raw water delivery pipe, and the other pipeline is connected to the raw water delivery pipe after passing through the cold end of the energy recovery device; a fourth valve is installed on the pipeline directly connected to the raw water delivery pipe, and a sixth valve is installed on the other pipeline; The water treatment system comprises a water distribution well connected to the raw water delivery pipe and a water treatment device connected to the water distribution well through a water distribution well outlet pipe; The water treatment facility outlet pipe of the water treatment device is divided into two pipes, one pipe is connected to the clean water tank, and the other pipe passes through the hot end of the energy recovery device and then passes through the cold end of the plate heat exchanger; the fifth valve is installed on the pipe connected to the clean water tank, and the seventh valve is installed on the other pipe; The water outlet of the pipeline passing through the hot end of the energy recovery device and then the cold end of the plate heat exchanger is connected to the water inlet of the clean water tank; the water outlet of the clean water tank is connected to a water supply pipe, and a water supply pump is installed on the water supply pipe.

2. A system for realizing water-cooling and co-supply using temperature-stratified reservoir source water as claimed in claim 1, characterized in that: A raw water delivery pump is installed on the raw water delivery pipe.

3. A system for realizing water-cooling and co-supply using temperature-stratified reservoir source water as claimed in claim 1, characterized in that: The refrigeration unit comprises a plurality of plate heat exchangers connected in series, and a cooling water circulation pump is installed on the pipeline entering the hot end of the plate heat exchanger.

4. A system for realizing water-cooling and co-supply using temperature-stratified reservoir source water as claimed in claim 1, characterized in that: The circulation pipeline in the air conditioning device passes through the cold end of the refrigeration unit.

5. A system for realizing water-cooling and co-supply using temperature-stratified reservoir source water as claimed in claim 4, characterized in that: A chilled water circulation pump is installed on the circulation pipeline in the air-conditioning device.

6. A method for realizing water-cooling co-supply using temperature-stratified reservoir source water, characterized in that: A system as claimed in any one of claims 1 to 5 is used, comprising: Open the valve on the deepest water inlet pipe among the multiple water inlet pipes, close the valves on the other water inlet pipes and close the fourth valve and the fifth valve, and open the sixth valve and the seventh valve; driven by the raw water delivery pump, the water from the bottom of the reservoir enters the energy recovery device through the raw water delivery pipe, drives the clean water from the water treatment device into the plate heat exchanger, and the clean water entering the plate heat exchanger exchanges heat with the refrigeration unit. The heated clean water enters the clean water tank, and the water supply pump draws the clean water in the clean water tank to supply water to residents through the water supply pipe; In the plate heat exchanger, the circulating cooling water return water releases the heat absorbed from the condenser of the refrigeration unit into the clean water, the water temperature decreases, and enters the condensers of multiple refrigeration units in sequence through the circulating cooling water supply pipe and the circulating cooling water inlet pipe, absorbs the heat on the chilled water side, the water temperature increases, and driven by the cooling water circulation pump, returns to the plate heat exchanger through the circulating cooling water outlet pipe and the circulating cooling water return pipe, and circulates; Driven by the chilled water circulation pump, the return water from the air-conditioning unit enters the evaporators of multiple refrigeration units through the chilled water return pipe for cooling. After cooling, it returns to the air-conditioning unit through the chilled water supply pipe for cooling.

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