A condensation cooling system for data centers

Abstract

This invention provides a condensation cooling system for data centers, comprising a cold source unit, a water system pipeline, and one or more water-cooled evaporation units. The cold source unit includes one or more evaporative condensing chillers and one air-cooled chiller, all connected in parallel and connected to the water system pipeline. The one or more water-cooled evaporation units are also connected to the water system pipeline. Cooling water flows from the cold source unit, is transported through the water system pipeline to the water-cooled evaporation unit for heat exchange and temperature increase, and then returns to the cold source unit for heat exchange and temperature decrease via the water system pipeline. The system features an evaporative cooling mode and a hybrid cooling mode. In the evaporative cooling mode, it fully utilizes outdoor natural cold sources; in the hybrid cooling mode, it ensures energy-saving operation throughout the year; the loop pipeline allows for online maintenance and replacement; and by incorporating a water-refrigerant heat exchanger and existing air-cooled precision air conditioning terminals in the data center, it reduces retrofit costs.

Description

Technical Field

[0001] This invention relates to condensation cooling systems, and more specifically to condensation cooling systems for data centers and communication buildings. Background Technology

[0002] As the number and capacity of data center racks gradually increase, the energy consumption and efficiency of cooling systems have become a key concern for society.

[0003] The operating mode of data center air conditioning systems differs from that of traditional civil building air conditioning systems, which aim to meet comfort requirements. The heat dissipation of server equipment in data center computer rooms is a steady-state heat source, and servers operate continuously throughout the year, thus requiring data center air conditioning systems to provide uninterrupted cooling year-round. Improving the year-round operating efficiency of data center air conditioning systems is one of the effective ways to address the high energy consumption of data centers.

[0004] Traditional data center server rooms use mechanical refrigeration precision air conditioning systems to directly handle the high-temperature return air. This mechanical refrigeration precision air conditioning system has two main drawbacks. First, it has high energy consumption. Second, some older data center equipment platforms have limited space, restricting the placement of outdoor air conditioning units and easily leading to a heat island effect, further contributing to high energy consumption throughout the year.

[0005] Chinese patent CN 114322374 A discloses a high-efficiency and energy-saving evaporative condenser and heat exchange method. By using an evaporative condenser for heat exchange, the heat exchange efficiency of the evaporative condenser can be improved, the ineffective evaporation of cooling water can be reduced, and water resources can be saved.

[0006] Chinese patent CN 112984658 A discloses an indirect evaporative condensing unit that uses a vertical tube indirect evaporative cooler to pre-cool the air entering the unit, ensuring that the air temperature entering the condenser is reduced and thus reducing compressor energy consumption.

[0007] Chinese Patent No. CN 112165842 A discloses that the present invention relates to the field of water cooling system technology for data centers, specifically to a gravity heat pipe water cooling system for data centers, which aims to solve the problem that in the prior art, water pipes are directly installed on the server, which is prone to leakage and causes the risk of electric shock. Summary of the Invention

[0008] Purpose of the invention: The technical problem to be solved by the present invention is the high energy consumption of traditional air-cooled precision air conditioning systems in existing computer buildings, which operate throughout the year. The invention provides a condensation cooling system for data centers.

[0009] To address the aforementioned technical problems, this invention provides a condensing heat dissipation system for data centers. This system includes a cold source unit, water system piping, and one or more water-cooled evaporation units. The cold source unit comprises one or more evaporative condensing chillers and one air-cooled chiller. All evaporative condensing chillers and air-cooled chillers are connected in parallel and are each connected to the water system piping. The one or more water-cooled evaporation units are each connected to the water system piping. Cooling water flows from the cold source unit, is transported through the water system piping to the water-cooled evaporation units for heat exchange and temperature increase, and then returns to the cold source unit for heat exchange and temperature reduction via the water system piping.

[0010] Furthermore, a first switching valve is installed at the cooling water supply port of the air-cooled chiller unit and on the branch line of the water system pipeline. A second switching valve is installed at the cooling water return port of the air-cooled chiller unit and on the branch line of the water system pipeline. This condensing heat dissipation system has an evaporative cooling mode. In evaporative cooling mode, the first and second switching valves are closed, the air-cooled chiller unit stops working, and one or more evaporative condensing chillers and water-cooled evaporative units are all turned on. This condensing heat dissipation system also has a mixed cooling mode. In mixed cooling mode, the first switching valve is open, and the air-cooled chiller unit, one or more evaporative condensing chillers, and water-cooled evaporative units are all turned on.

[0011] Furthermore, the water system piping includes a condenser-end supply water loop, a condenser-end return water loop, an evaporator-end supply water loop, and an evaporator-end return water loop. The evaporator-end supply water loop is connected to the condenser-end supply water loop. The evaporator-end return water loop is connected to the condenser-end return water loop via a branch line equipped with a cooling water pump. The cooling water inlet port of each water-cooled evaporator unit is connected to the evaporator-end supply water loop, and the cooling water outlet port of each water-cooled evaporator unit is connected to the evaporator-end return water loop. The cooling water supply port of each evaporator-condenser chiller unit and the cooling water supply port of each air-cooled chiller unit are both connected to the condenser-end supply water loop, and the cooling water return port of each evaporator-condenser chiller unit and the cooling water return port of each air-cooled chiller unit are both connected to the condenser-end return water loop. A first switching valve is located on a branch line connecting the cooling water supply port of the air-cooled chiller unit to the condenser-end supply water loop. A second switching valve is located on a branch line connecting the cooling water return port of the air-cooled chiller unit to the condenser-end return water loop.

[0012] Furthermore, the cooling water supply port of the evaporative condensing chiller is connected to the condenser end supply loop pipe via a branch equipped with a third switching valve. The cooling water return port of the evaporative condensing chiller is connected to the condenser end return loop pipe via a branch equipped with a fourth switching valve.

[0013] Furthermore, a fifth switching valve is installed on the branch line connecting the cooling water inlet port of the water-cooled evaporation unit to the evaporation end water supply loop pipe. A sixth switching valve is installed on the branch line connecting the cooling water outlet port of the water-cooled evaporation unit to the evaporation end return water loop pipe.

[0014] Furthermore, it also includes unit installation modules adapted to the number of evaporative condensing chillers and connected in series. The unit installation module includes a unit housing and piping components to accommodate the corresponding evaporative condensing chillers. The piping components include first to tenth quick-connect interfaces installed on the unit housing, and first, second, first, and second water supply pipes, and seventh to eighteenth valves located inside the unit housing. The first quick-connect interface is connected to the second quick-connect interface sequentially via the seventh valve, the first water supply pipe, and the eighth valve. The third quick-connect interface is connected to the fourth quick-connect interface sequentially via the ninth valve, the second water supply pipe, and the tenth valve. The end of the seventh valve near the first water supply pipe is connected to the end of the ninth valve near the second water supply pipe via the fifteenth valve, and the end of the eighth valve near the first water supply pipe is connected to the end of the tenth valve near the second water supply pipe via the sixteenth valve. The fifth quick-connect interface is connected to the sixth quick-connect interface sequentially via the eleventh valve, the first water return pipe, and the twelfth valve. The seventh quick-connect interface connects sequentially to the eighth quick-connect interface via the thirteenth valve, the second return water pipeline, and the fourteenth valve. The end of the eleventh valve near the first return water pipeline connects to the end of the thirteenth valve near the second return water pipeline via the seventeenth valve. The end of the twelfth valve near the first return water pipeline connects to the end of the fourteenth valve near the second return water pipeline via the eighteenth valve. The ninth quick-connect interface connects to the first supply water pipeline via the first supply water branch, with the connection point between the first supply water branch and the first supply water pipeline located between the fifteenth and sixteenth valves. The cooling water supply port of the evaporative condensing chiller unit connects to the second supply water pipeline via the second supply water branch, with the connection point between the second supply water branch and the second supply water pipeline located between the eleventh and twelfth valves. The tenth quick-connect interface connects to the first return water pipeline via the first return water branch. The cooling water return port of the evaporative condensing chiller unit connects to the second return water pipeline via the second return water branch, with the connection point between the second return water branch and the second return water pipeline located between the thirteenth and fourteenth valves. The first water supply line connects sequentially to the evaporator end water supply loop via the first water supply branch and the ninth quick connector. The first return water line connects sequentially to the evaporator end return water loop via the first return water branch and the tenth quick connector. The end of the first switching valve furthest from the air-cooled chiller unit connects to the first and third quick connectors of the first piping assembly via a branch pipe. The end of the second switching valve furthest from the air-cooled chiller unit connects to the fifth and seventh quick connectors of the first piping assembly via a branch pipe.

[0015] Furthermore, at least one water-cooled evaporation unit comprises a water-refrigerant heat exchanger and an air-cooled precision air conditioning terminal. The air-cooled precision air conditioning terminal includes a first compressor and a first evaporator. The water-refrigerant heat exchanger is sequentially connected to the first compressor and the first evaporator to form a refrigerant circulation loop. The cooling water outlet port of the water-cooled evaporation unit is the same as the cooling water outlet port of the water-refrigerant heat exchanger. The cooling water inlet port of the water-cooled evaporation unit is the same as the cooling water inlet port of the water-refrigerant heat exchanger.

[0016] Furthermore, the water-cooled evaporation unit also includes one or more water-cooled air conditioning terminals. The cooling water inlet port of the water-cooled air conditioning terminal is connected to the evaporator end water supply loop pipe, and the cooling water outlet port of the water-cooled air conditioning terminal is connected to the evaporator end water return loop pipe.

[0017] Furthermore, the evaporative condensing chiller unit includes a first fan, packing material, an evaporative condenser located in the center of the packing material, a circulating water spray unit, a circulating water pipe, a spray water pump, and a water tank. The circulating water pipe connects the circulating water spray unit and the water tank. A spray water pump is installed on the circulating water pipe. The spray water pump drives the water in the water tank to spray onto the evaporative condenser. The first fan drives air to blow over the evaporative condenser and the packing material.

[0018] Furthermore, the air-cooled chiller unit includes a second fan and a second compressor, a second evaporator, a second expansion valve, and an air-cooled condenser connected in sequence. The second fan drives air to blow over the air-cooled condenser.

[0019] Beneficial effects:

[0020] (1) The condensing cooling system for data centers provided by this invention employs one or more evaporative condensing chillers and one air-cooled chiller as the cold source unit. The evaporative condensing chiller cools the cooling water through an evaporative condensation process and then sends it to the water-cooled evaporative unit through a water system pipeline. In contrast, the air-cooled condensing unit of a traditional mechanical refrigeration air-cooled air conditioning system cools the refrigerant through a mechanical compression refrigeration process and then sends it to the air-cooled precision air conditioning terminal. Compared to mechanical compression refrigeration, the evaporative condensation process is more energy-efficient. Therefore, the system of this invention has lower energy consumption than the traditional mechanical refrigeration air-cooled air conditioning system, which is beneficial for the energy-saving operation of the data center throughout the year. At the same time, since the cooling water after heat exchange is sent to the cold source unit for heat exchange and cooling through a water system pipeline, the system will not generate a heat island effect outside the computer room, which is further beneficial for the energy-saving operation of the data center.

[0021] (2) Some embodiments of the present invention, by setting a first switching valve and a second switching valve, and by controlling the opening and closing of the first switching valve and the second switching valve, as well as the start and stop of equipment such as air-cooled chiller, evaporative condensing chiller and water-cooled evaporation unit, enable the system to have an evaporative cooling mode and a mixed cooling mode; the system switches between the two modes according to changes in meteorological conditions; in the evaporative cooling mode, the system can make full use of outdoor natural cold sources during the transition season and winter; in the mixed cooling mode, the air-cooled chiller and the evaporative condensing chiller work together to cool the cooling water, so as to ensure the energy-saving operation of the data center throughout the year.

[0022] (3) Some embodiments of the present invention, by setting up unit installation modules adapted to the number of evaporative condensing chillers, enable the evaporative condensing chillers and air-cooled chillers to be connected in a loop. Any component in this system meets the conditions for online maintenance and replacement; at the same time, since each evaporative condensing chiller, piping assembly, cooling water pump, third switch valve, and fourth switch valve are all integrated into the corresponding unit housing, the requirements of data centers in terms of standardized production, modularization, and rapid delivery are met.

[0023] (4) Some embodiments of the present invention utilize a water-cooled evaporation unit including a water-fluorine heat exchanger and an air-cooled precision air conditioning terminal, so that the system can make full use of the air-cooled precision air conditioning terminal of the traditional mechanical refrigeration air-cooled air conditioning system used in the existing computer room, reducing the improvement cost; compared with the traditional water-cooled air conditioning terminal, since the water-fluorine heat exchanger is installed outside the computer room, there is no risk of water leakage inside the computer room. Attached Figure Description

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the present invention in the above and / or other aspects will become clearer.

[0025] Figure 1 A schematic diagram of a condenser cooling system for data centers provided by the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of an evaporative condensing chiller unit installed in a unit installation module according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of a unit installation module according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of a condensation cooling system for a data center according to an embodiment of the present invention. Detailed Implementation

[0029] The reference numerals in the accompanying drawings of this invention are as follows: water system pipeline 100, condenser end water supply loop 110, condenser end water return loop 120, evaporator end water supply loop 130, evaporator end water return loop 140, cooling water pump 150, water-cooled evaporation unit 200, fifth switching valve 210, sixth switching valve 220, water-fluorine heat exchanger 230, air-cooled precision air conditioning terminal 240, first compressor 241, first evaporator 242, water-cooled air conditioning terminal 250, evaporative condensing chiller unit. 300, Third switch valve 310, Fourth switch valve 320, First fan 330, Packing 340, Evaporator-condenser 350, Circulating water spray unit 360, Circulating water pipe 370, Spray water pump 380, Water tank 390, Air-cooled chiller unit 400, Air-cooled chiller unit 400, First switch valve 410, Second switch valve 420, Second fan 430, Second compressor 440, Second evaporator 450, Second throttle valve 460, Air-cooled condenser 470. Cooling source unit 500, unit installation module 600, unit housing 601, first quick-connect interface 602, second quick-connect interface 603, third quick-connect interface 604, fourth quick-connect interface 605, fifth quick-connect interface 606, sixth quick-connect interface 607, seventh quick-connect interface 608, eighth quick-connect interface 609, ninth quick-connect interface 610, tenth quick-connect interface 611, first water supply pipeline 612, second water supply pipeline 613, first return water pipeline 614, second return water pipeline 615, and so on. Water pipe 615, seventh valve 616, eighth valve 617, ninth valve 618, tenth valve 619, eleventh valve 620, twelfth valve 621, thirteenth valve 622, fourteenth valve 623, fifteenth valve 624, sixteenth valve 625, seventeenth valve 626, eighteenth valve 627, first water supply branch 628, second water supply branch 629, first return water branch 630, second return water branch 631.

[0030] The technical solution of the present invention will now be described in detail with reference to the accompanying drawings. In the drawings, arrows represent the flow direction of cooling water, the pipes through which the cooling water flows after heat exchange and heating are represented by dashed lines, and the pipes through which the cooling water flows after heat exchange and cooling are represented by solid lines.

[0031] The internal environment of data center server rooms is primarily characterized by sensible heat, with temperatures in the rack intake area ranging from 18 to 27°C. This represents a significant increase in supply air temperature compared to traditional residential air conditioning systems, providing an excellent opportunity to apply natural cooling technology to data centers operating year-round. Evaporative cooling chillers do not use compression refrigeration, providing cooling through natural cold sources for extended periods throughout the year, resulting in significant energy savings.

[0032] See Figures 1 to 4This invention provides a condensation cooling system for data centers. The system includes a cold source unit 500, a water system pipeline 100, and one or more water-cooled evaporation units 200. The cold source unit 500 includes one or more evaporative condensing chillers 300 and one air-cooled chiller 400. All evaporative condensing chillers 300 and air-cooled chillers 400 are connected in parallel and are each connected to the water system pipeline 100. The one or more water-cooled evaporation units 200 are each connected to the water system pipeline 100. Cooling water flows out from the cold source unit 500, is transported through the water system pipeline 100 to the water-cooled evaporation unit 200 for heat exchange and temperature increase, and then returns to the cold source unit 500 through the water system pipeline 100 for heat exchange and temperature reduction.

[0033] This invention provides a condensing cooling system for data centers, employing one or more evaporative condensing chillers 300 and one air-cooled chiller 400 as the cold source unit. The evaporative condensing chiller 300 cools the cooling water through an evaporative condensation process and then sends it to the water-cooled evaporative unit 200 via water system piping 100. In contrast, the air-cooled condensing unit of a traditional mechanical refrigeration air-cooled air conditioning system cools the refrigerant through a mechanical compression refrigeration process before sending it to the air-cooled precision air conditioning terminal. Compared to mechanical compression refrigeration, the evaporative condensation process is more energy-efficient. Therefore, the system of this invention has lower energy consumption than traditional mechanical refrigeration air-cooled air conditioning systems, which is beneficial for the year-round energy-saving operation of data centers.

[0034] Meanwhile, since the cooling water heated by heat exchange is sent to the cold source unit 500 for heat exchange and cooling through the water system pipeline 100, the system will not generate a heat island effect outside the computer room, which is more conducive to the energy-saving operation of the data center.

[0035] In some embodiments of the present invention, see Figure 1 A first switching valve 410 is installed at the cooling water supply port of the continuous ventilation and cooling chiller unit 400 and on the branch line of the water system pipeline 100. A second switching valve 420 is installed at the cooling water return port of the continuous ventilation and cooling chiller unit 400 and on the branch line of the water system pipeline 100.

[0036] The condensing heat dissipation system has an evaporative cooling mode. In the evaporative cooling mode, the first switching valve 410 and the second switching valve 420 are closed, the air-cooled chiller unit 400 stops working, and one or more evaporative condensing chiller units 300 and water-cooled evaporation units 200 are turned on.

[0037] The condensing heat dissipation system has a mixed cooling mode. In the mixed cooling mode, the first switching valve 410 is turned on, and the air-cooled chiller unit 400, one or more evaporative condensing chillers 300 and the water-cooled evaporation unit 200 are all turned on.

[0038] This embodiment is equipped with a first switching valve 410 and a second switching valve 420. By controlling the opening and closing of the first switching valve 410 and the second switching valve 420, as well as the start and stop of equipment such as the air-cooled chiller unit 400, the evaporative condensing chiller unit 300, and the water-cooled evaporation unit 200, the system can switch between two modes: evaporative cooling mode and hybrid cooling mode.

[0039] During transitional seasons and winter, the system can enter evaporative cooling mode, making full use of outdoor natural cold sources to exchange heat and cool the cooling water. In other seasons, when natural cold sources are insufficient to ensure the heat exchange and cooling effect of the evaporative condensing chiller, the system can switch to hybrid cooling mode, using both air-cooled chillers and evaporative condensing chillers to exchange heat and cool the cooling water, ensuring energy-efficient operation of the data center throughout the year.

[0040] In some embodiments of the present invention, see Figure 1 The water system piping 100 includes a condenser end supply water ring pipe 110, a condenser end return water ring pipe 120, an evaporator end supply water ring pipe 130, and an evaporator end return water ring pipe 140. The evaporator end supply water ring pipe 130 is connected to the condenser end supply water ring pipe 110. The evaporator end return water ring pipe 140 is connected to the condenser end return water ring pipe 120 via a branch line equipped with a cooling water pump 150. The cooling water inlet port of each water-cooled evaporator unit 200 is connected to the evaporator end supply water ring pipe 130, and the cooling water outlet port of each water-cooled evaporator unit 200 is connected to the evaporator end return water ring pipe 140. The cooling water supply ports of each evaporative condensing chiller unit 300 and the air-cooled chiller unit 400 are connected to the condenser end supply loop pipe 110, respectively. The cooling water return ports of each evaporative condensing chiller unit 300 and the air-cooled chiller unit 400 are connected to the condenser end return loop pipe 120, respectively. A first switching valve 410 is located on a branch connecting the cooling water supply ports of the air-cooled chiller unit 400 and the condenser end supply loop pipe 110. A second switching valve 420 is located on a branch connecting the cooling water return ports of the air-cooled chiller unit 400 and the condenser end return loop pipe 120.

[0041] In some embodiments of the present invention, see Figure 1 The cooling water supply port of the evaporative condensing chiller unit 300 is connected to the condensing end supply ring pipe 110 via a branch equipped with a third switch valve 310. The cooling water return port of the evaporative condensing chiller unit 300 is connected to the condensing end return ring pipe 120 via a branch equipped with a fourth switch valve 320.

[0042] In some embodiments of the present invention, see Figure 1A fifth switching valve 210 is installed on the branch line connecting the cooling water inlet port of the water-cooled evaporation unit 200 to the evaporation end water supply ring pipe 130. A sixth switching valve 220 is installed on the branch line connecting the cooling water outlet port of the water-cooled evaporation unit 200 to the evaporation end return water ring pipe 140.

[0043] In some embodiments of the present invention, see Figure 1 The water-cooled evaporation unit 200 includes a water-refrigerant heat exchanger 230 and an air-cooled precision air conditioning terminal 240. The air-cooled precision air conditioning terminal 240 includes a first compressor 241 and a first evaporator 242 connected in sequence. The cooling water outlet port of the water-cooled evaporation unit 200 is the same as the cooling water outlet port of the water-refrigerant heat exchanger 230. The cooling water inlet port of the water-cooled evaporation unit 200 is also the same as the cooling water inlet port of the water-refrigerant heat exchanger 230.

[0044] In some embodiments of the present invention, see Figure 2 The evaporative condensing chiller unit 300 includes a first fan 330, packing 340, an evaporative condenser 350 located in the center of the packing 340, a circulating water spray unit 360, a circulating water pipe 370, a spray water pump 380, and a water tank 390. The circulating water pipe 370 connects the circulating water spray unit 360 and the water tank 390. The spray water pump 380 is installed on the circulating water pipe 370. The spray water pump 380 drives the water in the water tank 390 to spray onto the evaporative condenser 350. The first fan 330 drives air to blow over the evaporative condenser 350 and the packing 340.

[0045] In some embodiments of the present invention, see Figure 4 The air-cooled chiller unit 400 includes a second fan 430 and a second compressor 440, a second evaporator 450, a second expansion valve 460, and an air-cooled condenser 470 connected in sequence. The second fan 430 drives air to blow over the air-cooled condenser 470.

[0046] In some embodiments of the present invention, see Figure 2 and Figure 4The system also includes unit installation modules 600 adapted to the number of evaporative condensing chillers 300 and connected in series. The unit installation module 600 includes a unit housing 601 for accommodating the corresponding evaporative condensing chiller 300 and piping assemblies. The piping assemblies include first to tenth quick-connect interfaces mounted on the unit housing 601, and first supply water pipe 612, second supply water pipe 613, first return water pipe 614, second return water pipe 615, and seventh to eighteenth valves located within the unit housing 601. The first quick-connect interface 602 is sequentially connected to the second quick-connect interface 603 via the seventh valve 616, the first supply water pipe 612, and the eighth valve 617. The third quick-connect interface 604 is sequentially connected to the fourth quick-connect interface 605 via the ninth valve 618, the second supply water pipe 613, and the tenth valve 619. The end of the seventh valve 616 near the first water supply line 612 is connected to the end of the ninth valve 618 near the second water supply line 613 via the fifteenth valve 624. The end of the eighth valve 617 near the first water supply line 612 is connected to the end of the tenth valve 619 near the second water supply line 613 via the sixteenth valve 625. The fifth quick connector 606 is connected to the sixth quick connector 607 via the eleventh valve 620, the first return water line 614, and the twelfth valve 621. The seventh quick connector 608 is connected to the eighth quick connector 609 via the thirteenth valve 622, the second return water line 615, and the fourteenth valve 623. The end of the eleventh valve 620 near the first return water line 614 is connected to the end of the thirteenth valve 622 near the second return water line 615 via the seventeenth valve 626. The end of the twelfth valve 621 near the first return water pipe 614 is connected to the end of the fourteenth valve 623 near the second return water pipe 615 via the eighteenth valve 627. The ninth quick connector 610 is connected to the first supply water pipe 612 via the first supply water branch 628, and the connection point between the first supply water branch 628 and the first supply water pipe 612 is located between the fifteenth valve 624 and the sixteenth valve 625. The cooling water supply port of the evaporative condensing chiller unit 300 is connected to the second supply water pipe 613 via the second supply water branch 629, and the connection point between the second supply water branch 629 and the second supply water pipe 613 is located between the eleventh valve 620 and the twelfth valve 621. The tenth quick connector 611 is connected to the first return water pipe 614 via the first return water branch 630. The cooling water return port of the evaporative condensing chiller unit 300 is connected to the second return water pipe 615 via the second return water branch 631. The connection point between the second return water branch 631 and the second return water pipe 615 is located between the thirteenth valve 622 and the fourteenth valve 623. The first supply water pipe 612 is connected to the evaporator end supply water ring pipe 130 via the first supply water branch 628 and the ninth quick connector 610. The first return water pipe 614 is connected to the evaporator end return water ring pipe 140 via the first return water branch 630 and the tenth quick connector 611.The end of the first switching valve 410 furthest from the air-cooled chiller unit 400 is connected via a branch pipe to the first quick-connect port 602 and the third quick-connect port 604 of the first piping assembly. The end of the second switching valve 420 furthest from the air-cooled chiller unit 400 is connected via a branch pipe to the fifth quick-connect port 606 and the seventh quick-connect port 608 of the first piping assembly.

[0047] See Figure 4 The unit installation modules 600 are connected in series as follows: the first quick interface 602 of unit installation module 600 is connected to the second quick interface 603 of the adjacent unit installation module 600; the third quick interface 604 of unit installation module 600 is connected to the fourth quick interface 605 of the adjacent unit installation module 600; the fifth quick interface 606 of unit installation module 600 is connected to the sixth quick interface 607 of the adjacent unit installation module 600; and the seventh quick interface 608 of unit installation module 600 is connected to the eighth quick interface 609 of the adjacent unit installation module 600.

[0048] See Figure 4 The first piping component refers to the piping component in the unit installation module 600 that is closest to the air-cooled chiller unit 400.

[0049] In this embodiment, by setting up unit installation modules 600 adapted to the number of evaporative condensing chillers 300, the evaporative condensing chillers 300 and the air-cooled chillers 400 are connected in a loop configuration. Any component in this system meets the requirements for online maintenance and replacement.

[0050] Meanwhile, since each evaporative condensing chiller unit 300, piping components, cooling water pump 150, third switching valve 310 and fourth switching valve 320 are all integrated into the corresponding unit housing 601, the requirements of data centers in terms of standardized production, modularization and rapid delivery are met.

[0051] In some embodiments, see Figure 4 Taking two unit installation modules 600 connected in series as an example, the fifteenth to eighteenth valves of the unit installation module 600 closest to the air-cooled chiller unit 400 are all kept closed, and the fifteenth, seventeenth, eighth valve 617, tenth valve 619, twelfth valve 621 and fourteenth valve 623 of the unit installation module 600 farthest from the air-cooled chiller unit 400 are all kept closed. The other valves of the two unit installation modules 600 are kept open, thus forming the condensate end water supply loop 110 and the condensate end water return loop 120 of the system.

[0052] In some embodiments of the present invention, see Figure 1At least one water-cooled evaporation unit 200 includes a water-refrigerant heat exchanger 230 and an air-cooled precision air conditioning terminal 240. The air-cooled precision air conditioning terminal 240 includes a first compressor 241 and a first evaporator 242. The water-refrigerant heat exchanger 230 is sequentially connected to the first compressor 241 and the first evaporator 242 to form a refrigerant circulation loop. The cooling water outlet port of the water-cooled evaporation unit 200 is the same as the cooling water outlet port of the water-refrigerant heat exchanger 230. The cooling water inlet port of the water-cooled evaporation unit 200 is also the same as the cooling water inlet port of the water-refrigerant heat exchanger 230.

[0053] This embodiment employs a water-cooled evaporation unit 200, including a water-refrigerant heat exchanger 230 and an air-cooled precision air conditioning terminal 240. This allows the system to fully utilize the air-cooled precision air conditioning terminal 240 of the existing mechanical refrigeration air-cooled air conditioning system used in the computer room, reducing improvement costs. The water-refrigerant heat exchanger 230 is installed outside the computer room. Compared to traditional water-cooled air conditioning terminals, because the water-refrigerant heat exchanger 230 is installed outside the computer room, there is no risk of water leakage inside the computer room.

[0054] In some embodiments of the present invention, see Figure 1 and Figure 4 The water-cooled evaporation unit 200 also includes one or more water-cooled air conditioning terminals 250. The cooling water inlet port of the water-cooled air conditioning terminal 250 is connected to the evaporator end return water ring pipe 140, and the cooling water outlet port of the water-cooled air conditioning terminal 250 is connected to the evaporator end return water ring pipe 140.

[0055] In some embodiments of the present invention, see Figure 2 The evaporative condensing chiller unit 300 includes a first fan 330, packing 340, an evaporative condenser 350 located in the center of the packing 340, a circulating water spray unit 360, a circulating water pipe 370, a spray water pump 380, and a water tank 390. The circulating water pipe 370 connects the circulating water spray unit 360 and the water tank 390. The spray water pump 380 is installed on the circulating water pipe 370. The spray water pump 380 drives the water in the water tank 390 to spray onto the evaporative condenser 350. The first fan 330 drives air to blow over the evaporative condenser 350 and the packing 340.

[0056] In some embodiments of the present invention, see Figure 4 The air-cooled chiller unit 400 includes a second fan 430 and a second compressor 440, a second evaporator 450, a second expansion valve 460, and an air-cooled condenser 470 connected in sequence. The second fan 430 drives air to blow over the air-cooled condenser 470.

[0057] Specifically, when the first switching valve 410, the second switching valve 420, and the second compressor 440 are closed, and the spray water pump 380, the first fan 330, the cooling water pump 150, the fifth switching valve 210, and the sixth switching valve 220 are all open, the air-cooled chiller unit 400 stops operating, and the evaporative condensing chiller unit 300 exchanges heat with the cooling water to cool it down. The system is in evaporative cooling mode.

[0058] When the first switching valve 410, the second switching valve 420, the second compressor 440, the spray water pump 380, the first fan 330, the cooling water pump 150, the fifth switching valve 210, and the sixth switching valve 220 are all open, the air-cooled chiller unit 400 and the evaporative condensing chiller unit 300 operate in parallel, and the system is in a mixed cooling mode.

[0059] The present invention provides a data center condensing cooling system in which the number of evaporative condensing chillers 300 and water-cooled evaporative units 200 can be selected according to the data center's cooling needs. In some embodiments, the system can switch operating modes according to a set water supply temperature. In some embodiments, the water-cooled evaporative unit 200 uses only water-cooled evaporative units 200 including a water-refrigerant heat exchanger and an air-cooled precision air conditioning terminal 240, with a set water supply temperature of 32°C. When the outdoor ambient wet-bulb temperature is below 28°C, the system activates the evaporative cooling mode. When the outdoor ambient wet-bulb temperature is above 28°C, the system activates the hybrid cooling mode. In another embodiment, the water-cooled evaporative unit 200 still uses only water-cooled evaporative units 200 including a water-refrigerant heat exchanger and an air-cooled precision air conditioning terminal 240, with a set water supply temperature of 15°C. When the outdoor ambient wet-bulb temperature is below 11°C, the system activates the evaporative cooling mode. When the outdoor ambient wet-bulb temperature is above 11°C, the system activates the hybrid cooling mode.

[0060] This invention provides a concept and method for a condensation cooling system for data centers. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of the invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. A condensation cooling system for data centers, characterized in that, The system includes a cold source unit (500), a water system pipeline (100), and one or more water-cooled evaporation units (200). The cold source unit (500) includes one or more evaporative condensing chillers (300) and one air-cooled chiller (400). Each evaporative condensing chiller (300) and each air-cooled chiller (400) are connected in parallel and are respectively connected to the water system pipeline (100). The one or more water-cooled evaporation units (200) are respectively connected to the water system pipeline (100). Cooling water flows out from the cold source unit (500), is transported through the water system pipeline (100) to the water-cooled evaporation unit (200) for heat exchange and temperature increase, and the cooled water after heat exchange is returned to the cold source unit (500) for heat exchange and temperature decrease through the water system pipeline (100). At least one of the water-cooled evaporation units (200) is a water-cooled evaporation unit including a water-fluorine heat exchanger (230) and an air-cooled precision air conditioning terminal (240); the water-fluorine heat exchanger (230) is located outside the machine room; the air-cooled precision air conditioning terminal (240) includes a first compressor (241) and a first evaporator (242), the water-fluorine heat exchanger (230) is connected to the first compressor (241) and the first evaporator (242) in sequence to form a refrigerant circulation loop, the cooling water outlet port of the water-cooled evaporation unit (200) is the cooling water outlet port of the water-fluorine heat exchanger (230); the cooling water inlet port of the water-cooled evaporation unit (200) is the cooling water inlet port of the water-fluorine heat exchanger (230); A first switching valve (410) is installed at the cooling water supply port of the air-cooled chiller unit (400) and on the branch of the water system pipeline (100); a second switching valve (420) is installed at the cooling water return port of the air-cooled chiller unit (400) and on the branch of the water system pipeline (100); the condensing heat dissipation system has an evaporative cooling mode, in which the first switching valve (410) and the second switching valve (420) are closed, the air-cooled chiller unit (400) stops working, and one or more evaporative condensing chiller units (300) and water-cooled evaporation units (200) are all turned on; the condensing heat dissipation system has a mixed cooling mode, in which the first switching valve (410) is turned on, and the air-cooled chiller unit (400), one or more evaporative condensing chiller units (300) and water-cooled evaporation units (200) are all turned on; The water system piping (100) includes a condenser end water supply loop (110), a condenser end water return loop (120), an evaporator end water supply loop (130), and an evaporator end water return loop (140); the evaporator end water supply loop (130) is connected to the condenser end water supply loop (110); the evaporator end water return loop (140) is connected to the condenser end water return loop (120) through a branch line equipped with a cooling water pump (150); the cooling water inlet port of each water-cooled evaporator unit (200) is connected to the evaporator end water supply loop (130), and the cooling water outlet port of each water-cooled evaporator unit (200) is connected to the evaporator end water return loop (140); each evaporator-condenser chiller The cooling water supply port of the group (300) and the cooling water supply port of the air-cooled chiller (400) are respectively connected to the condenser end water supply ring pipe (110). The cooling water return port of each evaporative condensing chiller (300) and the cooling water return port of the air-cooled chiller (400) are respectively connected to the condenser end return water ring pipe (120). The first switch valve (410) is located on the branch of the cooling water supply port of the air-cooled chiller (400) and the condenser end water supply ring pipe (110). The second switch valve (420) is located on the branch of the cooling water return port of the air-cooled chiller (400) and the condenser end return water ring pipe (120).

2. The condensation cooling system for a data center according to claim 1, characterized in that, It also includes unit installation modules (600) adapted to the number of evaporative condensing chillers (300) and connected in series; the unit installation module (600) includes a unit housing (601) for accommodating the corresponding evaporative condensing chiller (300) and a piping assembly, the piping assembly including first to tenth quick interfaces installed on the unit housing (601) and a first water supply pipe (612), a second water supply pipe (613), a first return water pipe (614), a second return water pipe (615) and seventh to eighteenth valves located inside the unit housing (601); the first quick interface (602) passes through the seventh valve (616), the first water supply pipe (612), and the eighth valve in sequence. The door (617) is connected to the second quick interface (603); the third quick interface (604) is connected to the fourth quick interface (605) in sequence through the ninth valve (618), the second water supply pipeline (613), and the tenth valve (619); the end of the seventh valve (616) near the first water supply pipeline (612) is connected to the end of the ninth valve (618) near the second water supply pipeline (613) through the fifteenth valve (624); the end of the eighth valve (617) near the first water supply pipeline (612) is connected to the end of the tenth valve (619) near the second water supply pipeline (613) through the sixteenth valve (625); the fifth quick interface (606) is connected to the eleventh valve (618) in sequence through the eleventh valve (619) 620), the first return water pipeline (614), the twelfth valve (621) are connected to the sixth quick interface (607); the seventh quick interface (608) is connected to the eighth quick interface (609) in sequence through the thirteenth valve (622), the second return water pipeline (615), and the fourteenth valve (623); the end of the eleventh valve (620) near the first return water pipeline (614) is connected to the end of the thirteenth valve (622) near the second return water pipeline (615) through the seventeenth valve (626); the end of the twelfth valve (621) near the first return water pipeline (614) is connected to the end of the fourteenth valve (623) near the second return water pipeline (615) through the eighteenth valve (627) and the fourteenth valve (623). One end is connected; the ninth quick interface (610) is connected to the first water supply pipeline (612) through the first water supply branch (628), and the connection point between the first water supply branch (628) and the first water supply pipeline (612) is located between the fifteenth valve (624) and the sixteenth valve (625); the cooling water supply port of the evaporative condensing chiller unit (300) is connected to the second water supply pipeline (613) through the second water supply branch (629), and the connection point between the second water supply branch (629) and the second water supply pipeline (613) is located between the eleventh valve (620) and the twelfth valve (621); the tenth quick interface (611) is connected to the first return water pipeline (614) through the first return water branch (630);The cooling water return port of the evaporative condensing chiller unit (300) is connected to the second return water pipeline (615) through the second return water branch (631). The connection point between the second return water branch (631) and the second return water pipeline (615) is located between the thirteenth valve (622) and the fourteenth valve (623). The first water supply pipeline (612) is connected to the evaporator end water supply ring pipe (130) through the first water supply branch (628) and the ninth quick connector (610) in sequence. The first return water pipeline (614) is connected to the evaporator end water supply ring pipe (130) through the first water supply branch (628) and the ninth quick connector (610) in sequence. A return water branch (630) and a tenth quick-connect port (611) are connected to the evaporator end return water loop (140); the end of the first switch valve (410) furthest from the air-cooled chiller unit (400) is connected via a branch pipe to the first quick-connect port (602) and the third quick-connect port (604) of the first piping assembly; the end of the second switch valve (420) furthest from the air-cooled chiller unit (400) is connected via a branch pipe to the fifth quick-connect port (606) and the seventh quick-connect port (608) of the first piping assembly.

3. A condensation cooling system for a data center according to claim 2, characterized in that, The cooling water supply port of the evaporative condensing chiller (300) is connected to the condensing end water supply ring pipe (110) through a branch equipped with a third switch valve (310); the cooling water return port of the evaporative condensing chiller (300) is connected to the condensing end water return ring pipe (120) through a branch equipped with a fourth switch valve (320).

4. A condensation cooling system for a data center according to claim 3, characterized in that, A fifth switch valve (210) is provided on the branch line of the cooling water inlet port of the water-cooled evaporation unit (200) connected to the evaporation end water supply ring pipe (130); a sixth switch valve (220) is provided on the branch line of the cooling water outlet port of the water-cooled evaporation unit (200) connected to the evaporation end water return ring pipe (140).

5. A condensation cooling system for a data center according to claim 4, characterized in that, The water-cooled evaporation unit (200) also includes one or more water-cooled air conditioning terminals (250); the cooling water inlet port of the water-cooled air conditioning terminal (250) is connected to the evaporation end water supply ring pipe (130), and the cooling water outlet port of the water-cooled air conditioning terminal (250) is connected to the evaporation end return water ring pipe (140).

6. A condensation cooling system for a data center according to claim 5, characterized in that, The evaporative condensing chiller unit (300) includes a first fan (330), packing (340), an evaporative condenser (350) located in the center of the packing (340), a circulating water spray unit (360), a circulating water pipe (370), a spray water pump (380), and a water tank (390). The circulating water pipe (370) connects the circulating water spray unit (360) and the water tank (390). The circulating water pipe (370) is equipped with a spray water pump (380). The spray water pump (380) drives the water in the water tank (390) to spray onto the evaporative condenser (350). The first fan (330) drives air to blow over the evaporative condenser (350) and the packing (340).

7. A condensing heat dissipation system for a data center according to claim 6, characterized in that, The air-cooled chiller unit (400) includes a second fan (430) and a second compressor (440), a second evaporator (450), a second throttle valve (460) and an air-cooled condenser (470) connected in sequence; the second fan (430) drives air to blow over the air-cooled condenser (470).

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