Liquid cooling data center waste heat recovery system and control method thereof

Abstract

The invention discloses a liquid cooling data center waste heat recovery system and a control method thereof, and relates to the technical field of data center waste heat treatment. The liquid cooling data center waste heat recovery system comprises a liquid cooling module, a heat exchange module and a diesel generating set, the diesel generating set comprises a water jacket heater, the heat exchange module is provided with a first liquid inlet, a first liquid outlet, a first water inlet and a first water outlet, and a second liquid outlet of the liquid cooling module is communicated with the first liquid inlet of the heat exchange module. The second liquid inlet of the liquid cooling module is communicated with the first liquid outlet of the heat exchange module, the second water outlet of the water jacket heater is communicated with the first water inlet of the heat exchange module, and the second water inlet of the water jacket heater is communicated with the first water outlet of the heat exchange module. And the heat exchange module works to heat the water jacket heater. According to the scheme, the problem that the power consumption of a water jacket heater of a diesel generating set of a current data center is large can be solved.

Description

Technical Field

[0001] The present application relates to the field of data center waste heat treatment technology, and specifically to a liquid-cooled data center waste heat recovery system and a control method thereof. Background Art

[0002] With the full opening of the digital economy era, the mainstream power density of a single IT cabinet will increase from 6~8KW / cabinet to 12~15KW / cabinet, and the power density of supercomputing and intelligent computing centers will increase to more than 30kW. However, as the power consumption of products increases, energy consumption issues are becoming increasingly prominent. Data centers generate a lot of heat during operation, and this heat is usually discharged directly into the atmosphere.

[0003] The water jacket heater of the diesel generator set in the data center is a device that preheats the cooling water and lubricating oil of the diesel generator set. It can make the temperature of the cooling system reach and maintain within a certain range, so that the diesel generator set is always in hot standby state. In actual application, the water jacket heater is heated by electric heating, which leads to a large power consumption of the water jacket heater, especially during winter operation. Summary of the invention The purpose of the embodiments of the present application is to provide a liquid-cooled data center waste heat recovery system and a control method thereof, which can solve the problem of high power consumption of the water jacket heater of the diesel generator set in the current data center.

[0004] In order to solve the above technical problems, this application is implemented as follows: In a first aspect, an embodiment of the present application provides a waste heat recovery system for a liquid-cooled data center, comprising a liquid cooling module, a heat exchange module and a diesel generator set, wherein the diesel generator set comprises a water jacket heater, the heat exchange module is provided with a first liquid inlet, a first liquid discharge port, a first water inlet and a first drain port, the second liquid discharge port of the liquid cooling module is communicated with the first liquid inlet of the heat exchange module, the second liquid inlet of the liquid cooling module is communicated with the first liquid discharge port of the heat exchange module, the second drain port of the water jacket heater is communicated with the first water inlet of the heat exchange module, the second water inlet of the water jacket heater is communicated with the first drain port of the heat exchange module, When the temperature of the water jacket heater is less than or equal to a first preset temperature, the heat exchange module operates to heat the water jacket heater.

[0005] In a second aspect, an embodiment of the present application further provides a control method for a waste heat recovery system of a liquid-cooled data center, which is applied to the waste heat recovery system of the liquid-cooled data center, and includes: When the temperature of the water jacket heater is less than or equal to a first preset temperature, the heat exchange module is turned on to heat the water jacket heater.

[0006] In the embodiment of the present application, the drain port of the liquid cooling module is connected to the liquid inlet of the heat exchange module, the liquid inlet of the liquid cooling module is connected to the drain port of the heat exchange module, the drain port of the water jacket heater of the diesel generator set is connected to the water inlet of the heat exchange module, the water inlet of the water jacket heater is connected to the drain port of the heat exchange module, and when the temperature of the water jacket heater is less than or equal to the first preset temperature, the heat exchange module works to heat the water jacket heater. This solution is to set a heat exchange module between the liquid cooling module and the water jacket heater of the diesel generator set so that the heat generated by the liquid cooling module is transmitted to the water jacket heater, thereby replacing the electric heating method used in the prior art to heat the water jacket heater, so as to save the consumption of electric energy. Therefore, the embodiment of the present application can solve the problem of high power consumption of the water jacket heater of the diesel generator set in the current data center. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 It is a schematic diagram of the structure of part of the diesel generator set disclosed in the embodiment of the present application; Figure 2 This is a schematic diagram of the structure of the waste heat recovery system for a liquid-cooled data center disclosed in an embodiment of the present application; Figure 3 A partial structural schematic diagram of a waste heat recovery system for a liquid-cooled data center disclosed in an embodiment of the present application; Figure 4 A partial structural schematic diagram of a waste heat recovery system for a liquid-cooled data center disclosed in an embodiment of the present application; Figure 5 This is a partial structural schematic diagram of the heat exchange module disclosed in the embodiment of the present application.

[0007] Description of reference numerals: 100-liquid cooling module, 110-second liquid discharge port, 120-second liquid inlet; 200-heat exchange module, 210-first liquid inlet, 220-first liquid discharge port, 230-first water inlet, 240-first drain port, 250-first heat exchanger, 251-first water inlet, 252-first water outlet, 260-second heat exchanger, 261-second water inlet, 262-second water outlet, 270-first water pipe, 280-second water pipe, 291-circulating water pump, 292-water replenishment device; 300-diesel generator set, 310-water jacket heater, 311-second drain port, 312-second water inlet, 320-radiator, 330-cooling water device, 340-lubricating oil cooler; 400-power module; 500-drainage pipeline, 510-main pipeline, 520-first branch pipeline, 530-second branch pipeline; 600-liquid inlet pipeline; 700-cooling tower, 710-third liquid inlet, 720-third liquid outlet. DETAILED DESCRIPTION

[0008] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0009] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here. In addition, the "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship.

[0010] The waste heat recovery system for a liquid-cooled data center and the control method thereof provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0011] refer to Figures 1 to 5 The embodiment of the present application discloses a waste heat recovery system for a liquid-cooled data center, which includes a liquid cooling module 100, a heat exchange module 200 and a diesel generator set 300. The diesel generator set 300 includes a water jacket heater 310. The water jacket heater 310 is used to preheat the cooling water device 330 and the lubricating oil cooler 340 of the diesel generator set 300, so that the temperature of the unit reaches and remains within a certain range, so that the diesel generator set 300 is always in a hot standby state. In a low temperature state, the diesel generator set 300 can also be started quickly, stably and reliably, and loaded to full load in the shortest time to reduce the mechanical wear of the diesel generator set 300.

[0012] The heat exchange module 200 is provided with a first liquid inlet 210, a first liquid discharge port 220, a first water inlet 230 and a first drain port 240. The second liquid discharge port 110 of the liquid cooling module 100 is connected to the first liquid inlet 210 of the heat exchange module 200, and the second liquid inlet 120 of the liquid cooling module 100 is connected to the first liquid discharge port 220 of the heat exchange module 200 to form a first circulation loop. The second drain port 311 of the water jacket heater 310 is connected to the first water inlet 230 of the heat exchange module 200, and the second water inlet 312 of the water jacket heater 310 is connected to the first drain port 240 of the heat exchange module 200 to form a second circulation loop, wherein the first medium flowing in the first circulation loop and the second medium flowing in the second circulation loop may be the same or different. When the temperature of the water jacket heater 310 is less than or equal to the first preset temperature, the heat exchange module 200 works to heat the water jacket heater 310. Since the temperature of the first medium in the first circulation loop is higher, the first medium in the first circulation loop and the second medium in the second circulation loop exchange heat in the heat exchange module 200 by heat transfer, thereby heating the temperature of the second medium in the second circulation loop. At the same time, the temperature of the first medium in the first circulation pipeline decreases.

[0013] In the embodiment of the present application, a heat exchange module 200 is provided between the liquid cooling module 100 and the water jacket heater 310 of the diesel generator set 300, so that the heat generated by the liquid cooling module 100 is transferred to the water jacket heater 310, thereby replacing the electric heating method used in the prior art to heat the water jacket heater 310, so as to save the consumption of electric energy. Therefore, the embodiment of the present application can solve the problem of high power consumption of the water jacket heater 310 of the diesel generator set 300 in the current data center.

[0014] It should be noted that in the above embodiment, the waste heat recovery system for a liquid-cooled data center further includes a control device, which is electrically connected to the liquid-cooling module 100, the heat exchange module 200 and the water jacket heater 310, and the control device controls the working state of the heat exchange module 200 according to the temperature information of the water jacket heater 310. In other words, the above embodiment can be used to achieve unattended operation, and the system automatically operates according to a customized operation strategy.

[0015] In an optional embodiment, the heat exchange module 200 includes a first heat exchanger 250, a second heat exchanger 260, a first water pipe 270 and a second water pipe 280, the first heat exchanger 250 is provided with a first water inlet 251, a first water outlet 252, a first liquid inlet 210 and a first liquid discharge port 220, the second heat exchanger 260 is provided with a second water inlet 261, a second water outlet 262, a first water inlet 230 and a first water discharge port 240, the second liquid discharge port 110 of the liquid cooling module 100 is connected to the first liquid inlet 210 of the first heat exchanger 250, the second liquid inlet 120 of the liquid cooling module 100 is connected to the first liquid discharge port 220 of the first heat exchanger 250 to form a first circulation loop, and the water jacket heater 310 The second drain port 311 is connected to the first water inlet 230 of the second heat exchanger 260, the second water inlet 312 of the water jacket heater 310 is connected to the first drain port 240 of the second heat exchanger 260 to form a second circulation loop, the first water pipe 270 is connected between the first water outlet 252 of the first heat exchanger 250 and the second water inlet 261 of the second heat exchanger 260, and the second water pipe 280 is connected between the first water inlet 251 of the first heat exchanger 250 and the second water outlet 262 of the second heat exchanger 260 to form a third circulation loop, wherein the first medium flowing in the first circulation loop, the second medium flowing in the second circulation loop, and the third medium in the third circulation loop may be the same or different.

[0016] In order to reduce the heat loss of the pipeline, the jacket heater 310 and the second heat exchanger 260 are usually arranged closer, while the distance between the liquid cooling module 100 and the jacket heater 310 is far, and a longer first circulation loop needs to be arranged, which will affect the working efficiency of the liquid cooling module 100. Therefore, the above-mentioned heat exchange module 200 is adopted, and the first heat exchanger 250 (i.e., heat extraction heat exchange device) is arranged between the liquid cooling module 100 and the second heat exchanger 260 (i.e., heat using heat exchange device) to add a third circulation loop. At this time, the second heat exchanger 260 can be arranged adjacent to the jacket heater 310, and the length of the first circulation loop can be reduced, such as the first heat exchanger 250 and the liquid cooling module 100 are both arranged in the pump station; and the first heat exchanger 250 is used to isolate the liquid cooling module 100 from the second heat exchanger 260, which is conducive to improving the safety of the liquid cooling module 100. Of course, the first heat exchanger 250, the first water pipe 270 and the second water pipe 280 can also be not arranged.

[0017] Optionally, at least one of the first heat exchanger 250 and the second heat exchanger 260 can be a plate heat exchanger, which has the characteristics of high heat exchange efficiency, small heat loss, compact structure, small footprint, long service life, etc. Of course, it can also be a tubular heat exchanger, and the embodiment of the present application does not impose specific restrictions on this.

[0018] Optionally, the first heat exchanger 250 may be a heat pump type heat extraction device such as a water source heat pump, and the second heat exchanger 260 may be a fan coil unit, a radiator or the like, and the embodiment of the present application does not impose any specific limitation on this.

[0019] In a further optional embodiment, the heat exchange module 200 also includes a circulating water pump 291, and at least one of the first water pipe 270 and the second water pipe 280 is provided with a circulating water pump 291, and the circulating water pump 291 is used to accelerate the flow rate of the third medium in the third circulation loop, thereby improving the heat exchange efficiency.

[0020] In other optional embodiments, the heat exchange module 200 further includes a water replenishing device 292, and at least one of the first water pipe 270 and the second water pipe 280 is provided with a water replenishing device 292. Since part of the water vapor of the third medium in the third circulation loop will inevitably be lost after the temperature is increased, the water replenishing device 292 is provided to replenish water to ensure that the third flow rate of the medium in the third circulation loop can meet the use requirements.

[0021] In another optional embodiment, the waste heat recovery system of the liquid-cooled data center further includes a power module 400, which is electrically connected to the water jacket heater 310. The power module 400 is used to supply power to the water jacket heater 310. When the temperature of the water jacket heater 310 is less than the second preset temperature, the power module 400 works to heat the water jacket heater 310, wherein the second preset temperature is less than the first preset temperature. When the heat exchange module 200 fails, the water jacket heater 310 cannot be heated, resulting in a decrease in the temperature of the water jacket heater 310. When the temperature of the water jacket heater 310 drops to less than the second preset temperature, the power module 400 works to heat the water jacket heater 310 by electric heating, thereby maintaining the temperature of the water jacket heater 310. In this solution, the power module 400 serves as an emergency device to provide heat to the water jacket heater 310 when the heat exchange module 200 fails. Of course, the power module 400 can also be replaced with a wind-side waste heat recovery device or a fluorine-side waste heat recovery device of the data center to perform emergency heating for the water jacket heater 310.

[0022] In another optional embodiment, the waste heat recovery system of the liquid-cooled data center further includes a power module 400, which is electrically connected to the water jacket heater 310. The power module 400 is used to supply power to the water jacket heater 310. When the temperature of the water jacket heater 310 is less than the first preset temperature, the heat exchange module 200 and the power module 400 both work to heat the water jacket heater 310. When the waste heat recovered by the heat exchange module 200 is not enough to heat the water jacket heater 310, that is, the heat recovered by the heat exchange module 200 is less than the heat consumed by the water jacket heater 310, the heat exchange module 200 and the power module 400 can work at the same time, and the power module 400 serves as a supplementary device to ensure that the temperature of the water jacket heater 310 is maintained within the preset temperature range. Of course, the power module 400 can also be replaced by the wind-side waste heat recovery equipment or the fluorine-side waste heat recovery equipment of the data center, so as to supplement the heating of the water jacket heater 310, that is, the water jacket heater 310 is heated by two sets of waste heat recovery equipment at this time, thereby saving the power consumption of the data center.

[0023] In another optional embodiment, the waste heat recovery system of the liquid-cooled data center further includes a drain pipe 500, a liquid inlet pipe 600 and a cooling tower 700, wherein the first end of the drain pipe 500 is connected to the second drain port 110 of the liquid cooling module 100, the second end of the drain pipe 500 is connected to the third liquid inlet 710 of the cooling tower 700 and the first liquid inlet 210 of the heat exchange module 200, the first end of the liquid inlet pipe 600 is connected to the second liquid inlet 120 of the liquid cooling module 100, the second end of the liquid inlet pipe 600 is connected to the cooling tower 700, and the third liquid inlet 710 of the cooling tower 700 is connected to the cooling tower 700. The third liquid discharge port 720 and the first liquid discharge port 220 of the heat exchange module 200 are both connected. When the heat generated by the liquid cooling module 100 is greater than the heat consumed by the heat exchange module 200, part of the heat can be consumed by the cooling tower 700 to ensure that the heat generated by the liquid cooling module 100 is fully consumed, thereby improving the safety of the data center; when the heat generated by the liquid cooling module 100 is equal to or less than the heat consumed by the heat exchange module 200, the cooling tower 700 will stop working, and at this time, all the heat generated by the liquid cooling module 100 is used for the heat exchange module 200.

[0024] Optionally, the drain pipeline 500 and the inlet pipeline 600 each include a main pipeline 510, a first branch pipeline 520, and a second branch pipeline 530. The first end of the main pipeline 510 of the drain pipeline 500 is connected to the second drain port 110 of the liquid cooling module 100, the second end of the main pipeline 510 of the drain pipeline 500 is connected to the first end of the first branch pipeline 520 of the drain pipeline 500 and the first end of the second branch pipeline 530, the second end of the first branch pipeline 520 of the drain pipeline 500 is connected to the third liquid inlet 710 of the cooling tower 700, and the second branch pipeline 530 of the drain pipeline 500 is connected to the third liquid inlet 710 of the cooling tower 700. The second end is connected to the first liquid inlet 210 of the heat exchange module 200; the first end of the main pipeline 510 of the liquid inlet pipeline 600 is connected to the second liquid inlet 120 of the liquid cooling module 100, the second end of the main pipeline 510 of the liquid inlet pipeline 600 is connected to the first end of the first branch pipeline 520 and the first end of the second branch pipeline 530 of the liquid inlet pipeline 600, the second end of the first branch pipeline 520 of the liquid inlet pipeline 600 is connected to the third liquid discharge port 720 of the cooling tower 700, and the second end of the second branch pipeline 530 of the liquid inlet pipeline 600 is connected to the first liquid discharge port 220 of the heat exchange module 200.

[0025] Optionally, the second liquid discharge port 110 and the second liquid inlet 120 of the liquid cooling module 100 are both arranged on the return water pipeline of the liquid cooling module 100, which can avoid interference with the normal operation of the liquid cooling module 100; and facilitate the arrangement of the liquid discharge pipeline 500 and the liquid inlet pipeline 600.

[0026] Based on the waste heat recovery system for a liquid-cooled data center disclosed in the embodiment of the present application, the embodiment of the present application further discloses a control method for the waste heat recovery system for a liquid-cooled data center, which is applied to the waste heat recovery system for a liquid-cooled data center described in any of the above embodiments. The control method includes: S100 , when the temperature of the water jacket heater 310 is less than or equal to a first preset temperature, turning on the heat exchange module 200 to heat the water jacket heater 310 .

[0027] The first preset temperature here can be a certain value range or a specific value (such as 25°), and the embodiment of the present application does not impose any specific limitation on this.

[0028] In the embodiment of the present application, a heat exchange module 200 is provided between the liquid cooling module 100 and the water jacket heater 310 of the diesel generator set 300, so that the heat generated by the liquid cooling module 100 is transferred to the water jacket heater 310, thereby replacing the electric heating method used in the prior art to heat the water jacket heater 310, so as to save the consumption of electric energy. Therefore, the embodiment of the present application can solve the problem of high power consumption of the water jacket heater 310 of the diesel generator set 300 in the current data center.

[0029] In a further optional embodiment, the waste heat recovery system for a liquid-cooled data center further includes a power module 400, and the power module 400 is electrically connected to the water jacket heater 310. Step S100 specifically includes: S110 , when the temperature of the water jacket heater 310 is lower than the first preset temperature and greater than or equal to the second preset temperature, turn on the heat exchange module 200 to heat the water jacket heater 310 .

[0030] The second preset temperature here can be a certain value range or a specific value (such as 15°), and the embodiment of the present application does not impose any specific limitation on this.

[0031] S120. When the temperature of the water jacket heater is lower than a second preset temperature, turn on the power module 400 to heat the water jacket heater 310; wherein the second preset temperature is lower than the first preset temperature.

[0032] When the heat exchange module 200 fails, it will be unable to heat the water jacket heater 310, resulting in a drop in the temperature of the water jacket heater 310. When the temperature of the water jacket heater 310 drops to less than the second preset temperature, the power module 400 works to heat the water jacket heater 310 by electric heating, thereby maintaining the temperature of the water jacket heater 310. In this solution, the power module 400 serves as an emergency device to provide heat for the water jacket heater 310 when the heat exchange module 200 fails.

[0033] Alternatively, in other optional embodiments, step S100 specifically includes: S130 , when the temperature of the water jacket heater 310 is lower than the first preset temperature, turning on the heat exchange module 200 and the power module 400 to heat the water jacket heater 310 .

[0034] The second preset temperature here can be a certain value range or a specific value (such as 15°), and the embodiment of the present application does not impose any specific limitation on this.

[0035] When the waste heat recovered by the heat exchange module 200 is insufficient to heat the water jacket heater 310, that is, the heat recovered by the heat exchange module 200 is less than the heat consumed by the water jacket heater 310, the heat exchange module 200 and the power module 400 can work simultaneously, and the power module 400 serves as a supplementary device to ensure that the temperature of the water jacket heater 310 is maintained within a preset temperature range.

[0036] In a further optional embodiment, the waste heat recovery system of the liquid-cooled data center also includes a first temperature detection component and a second temperature detection component. The first temperature detection component is arranged at the second drain port 110 of the liquid cooling module 100, and the first temperature detection component is used to detect the temperature of the first medium at the second drain port 110 of the liquid cooling module 100. The second temperature detection component is arranged at the second water inlet 312 of the water jacket heater 310, and the second temperature detection component is used to detect the temperature of the second medium at the second water inlet 312 of the water jacket heater 310.

[0037] The control method also includes: S200, determining whether a difference between a first detection value of the first temperature detection component and a second detection value of the second temperature detection component is greater than a preset value.

[0038] The preset value here can be a certain numerical range (such as 2~3°) or a specific numerical value (such as 2°), and the embodiment of the present application does not impose any specific limitation on this.

[0039] S300: If yes, check whether the heat exchange module 200 is faulty.

[0040] Since heat loss is inevitable during the flow and heat exchange of the medium, the temperature of the first medium at the second liquid discharge port 110 of the liquid cooling module 100 is bound to be greater than the temperature of the second medium at the second water inlet 312 of the water jacket heater 310, that is, the first detection value is greater than the second detection value. However, when the difference between the first detection value and the second detection value is greater than the preset value, it indicates that the heat loss of the heat exchange module 200 is too large, and the staff will be reminded to check whether the various structures of the heat exchange module 200 are faulty, so as to perform troubleshooting to improve the heat exchange efficiency of the heat exchange module 200; if the difference between the first detection value and the second detection value is less than or equal to the preset value, it indicates that the heat loss of the heat exchange module 200 is within the normal range and the heat exchange module 200 is in normal operation. In another optional embodiment, the waste heat recovery system of the liquid-cooled data center further includes a radiator 320, and the radiator 320 is connected to the water jacket heater 310. The control method further includes: S400 , when the temperature of the water jacket heater 310 is greater than a first preset temperature, turn off the heat exchange module 200 and turn on the radiator 320 to cool the water jacket heater 310 .

[0041] When the temperature of the water jacket heater 310 is greater than the first preset temperature, the heat exchange module 200 is turned off and the radiator 320 is turned on to cool the water jacket heater 310, thereby reducing the temperature of the water jacket heater 310 to avoid the water jacket heater 310 being too high and damaging the diesel engine group 300 for protection.

[0042] Based on the waste heat recovery system and control method of the liquid-cooled data center disclosed in the above-mentioned embodiments, before designing, it is necessary to calculate the capacity of the waste heat resources that can be used according to the supply water temperature, return water temperature and water flow rate of the primary side cooling water of the existing liquid cooling module 100; then, the heat capacity is calculated according to the electric heating operation time, electric heating power, electric heating start temperature and electric heating shutdown temperature of the water jacket heater 310 of the existing diesel generator set 300, and then the waste heat resource capacity of the liquid cooling module 100 is matched with the heat capacity of the water jacket heater 310.

[0043] For example, the customized parameters of the first heat exchanger 250 may be as shown in Table 1: Table 1

[0044] The customized parameters of the second heat exchanger 260 may be as shown in Table 2: Table 2

[0045] According to actual applications, the comparison of operating parameters before and after the liquid cooling data center adopts the waste heat recovery system of the liquid cooling data center disclosed in the implementation of this application is shown in Table 3: Table 3

[0046] (1) Compared with the current solution, the embodiment of the present application can save 194,227 kWh of electricity per year. Based on the electricity price of 0.8 yuan / kWh, the electricity bill can be saved by 155,400 yuan per year.

[0047] (2) Description of carbon dioxide emission reduction According to the national power grid carbon dioxide emission factor of 0.5568kgCO2 / kwh, this plan can reduce CO2 emissions by 108t per year.

[0048] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A waste heat recovery system for a liquid-cooled data center, characterized in that: The invention comprises a liquid cooling module (100), a heat exchange module (200) and a diesel generator set (300), wherein the diesel generator set (300) comprises a water jacket heater (310), the heat exchange module (200) is provided with a first liquid inlet (210), a first liquid discharge port (220), a first water inlet (230) and a first water discharge port (240), and the second liquid discharge port (110) of the liquid cooling module (100) is connected to the first liquid inlet (210) of the heat exchange module (200). 10), the second liquid inlet (120) of the liquid cooling module (100) is connected to the first liquid drain port (220) of the heat exchange module (200), the second drain port (311) of the water jacket heater (310) is connected to the first water inlet (230) of the heat exchange module (200), and the second water inlet (312) of the water jacket heater (310) is connected to the first drain port (240) of the heat exchange module (200), When the temperature of the water jacket heater (310) is less than or equal to a first preset temperature, the heat exchange module (200) operates to heat the water jacket heater (310).

2. The waste heat recovery system for a liquid-cooled data center according to claim 1, characterized in that: The heat exchange module (200) comprises a first heat exchanger (250), a second heat exchanger (260), a first water pipe (270) and a second water pipe (280); the first heat exchanger (250) is provided with a first water inlet (251), a first water outlet (252), the first liquid inlet (210) and the first liquid outlet (220); the second heat exchanger (260) is provided with a second water inlet (261), a second water outlet (262), the first water inlet (230) and the first liquid outlet (240); the first water pipe (270) is connected between the first water outlet (252) and the second water inlet (261); and the second water pipe (280) is connected between the first water inlet (251) and the second water outlet (262).

3. The waste heat recovery system for a liquid-cooled data center according to claim 2, characterized in that: The heat exchange module (200) further comprises a circulating water pump (291), and at least one of the first water pipe (270) and the second water pipe (280) is provided with the circulating water pump (291); and / or, The heat exchange module (200) further comprises a water replenishment device (292), and at least one of the first water delivery pipe (270) and the second water delivery pipe (280) is provided with the water replenishment device (292).

4. The waste heat recovery system for a liquid-cooled data center according to claim 1, characterized in that: The liquid-cooled data center waste heat recovery system further comprises a power module (400), wherein the power module (400) is electrically connected to the water jacket heater (310), and the power module (400) is used to supply power to the water jacket heater (310). When the temperature of the water jacket heater (310) is lower than a second preset temperature, the power module (400) operates to heat the water jacket heater (310). Wherein, the second preset temperature is lower than the first preset temperature.

5. The waste heat recovery system for a liquid-cooled data center according to claim 1, characterized in that: The liquid-cooled data center waste heat recovery system further comprises a power module (400), wherein the power module (400) is electrically connected to the water jacket heater (310), and the power module (400) is used to supply power to the water jacket heater (310). When the temperature of the water jacket heater (310) is lower than the first preset temperature, both the heat exchange module (200) and the power module (400) operate to heat the water jacket heater (310).

6. The waste heat recovery system for a liquid-cooled data center according to claim 1, characterized in that: The liquid-cooled data center waste heat recovery system further comprises a liquid discharge pipeline (500), a liquid inlet pipeline (600) and a cooling tower (700); a first end of the liquid discharge pipeline (500) is connected to the second liquid discharge port (110) of the liquid cooling module (100); a second end of the liquid discharge pipeline (500) is connected to a third liquid inlet port (710) of the cooling tower (700) and the first liquid inlet port (210) of the heat exchange module (200); a first end of the liquid inlet pipeline (600) is connected to the second liquid inlet port (120) of the liquid cooling module (100); and a second end of the liquid inlet pipeline (600) is connected to the third liquid discharge port (720) of the cooling tower (700) and the first liquid discharge port (220) of the heat exchange module (200); The second liquid discharge port (110) and the second liquid inlet (120) of the liquid cooling module (100) are both arranged on a water return pipeline of the liquid cooling module (100).

7. A control method for a waste heat recovery system for a liquid-cooled data center, applied to the waste heat recovery system for a liquid-cooled data center according to any one of claims 1 to 6, characterized in that: include: When the temperature of the water jacket heater is lower than a first preset temperature, the heat exchange module is turned on to heat the water jacket heater.

8. The control method according to claim 7, characterized in that: The waste heat recovery system for a liquid-cooled data center further includes a power module, the power module is electrically connected to the water jacket heater, and when the temperature of the water jacket heater is lower than a first preset temperature, the heat exchange module is turned on to heat the water jacket heater, specifically including: When the temperature of the water jacket heater is lower than the first preset temperature and higher than or equal to the second preset temperature, turning on the heat exchange module to heat the water jacket heater; When the temperature of the water jacket heater is lower than the second preset temperature, turning on the power module to heat the water jacket heater; Wherein, the second preset temperature is lower than the first preset temperature; or, When the temperature of the water jacket heater is lower than the first preset temperature, the heat exchange module and the power module are turned on to heat the water jacket heater.

9. The control method according to claim 8, characterized in that: The waste heat recovery system for a liquid-cooled data center further includes a first temperature detection component and a second temperature detection component, wherein the first temperature detection component is disposed at a liquid discharge port of the liquid cooling module, and the second temperature detection component is disposed at a water inlet of the water jacket heater, and the control method further includes: Determining whether a difference between a first detection value of the first temperature detection element and a second detection value of the second temperature detection element is greater than a preset value; If so, check whether the heat exchange module fails.

10. The control method according to claim 7, characterized in that: The waste heat recovery system for a liquid-cooled data center further includes a radiator, and the radiator is connected to the water jacket heater. The control method further includes: When the temperature of the water jacket heater is greater than the first preset temperature, the heat exchange module is turned off and the radiator is turned on to cool the water jacket heater.

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