Data center heat pipe backboard tail end composite cooling waste heat recovery system

Abstract

The utility model discloses a data center heat pipe backboard tail end composite cooling waste heat recovery system, and relates to the technical field of data center heat dissipation. The air conditioner comprises a plurality of air conditioner back plates and at least one heat pipe circulating condenser. An outlet of the air conditioner back plate is connected with the evaporation end of the heat pipe circulation condenser, and an inlet of the air conditioner back plate is connected with the cooling end of the heat pipe circulation condenser. The heat pipe circulating condenser is connected with two cooling branches which are connected in parallel; wherein the first cooling branch is a compression cycle condenser heat dissipation branch; according to the second cooling branch, the evaporation end of the heat pipe circulation condenser sequentially passes through the compressor, a second valve and the water-fluorine heat exchanger and then returns to the condensation end of the heat pipe circulation condenser; and the water-fluorine heat exchanger is connected with a heat utilization pipeline. The heat utilization efficiency is improved, so that the whole system has more economic benefits and environmental friendliness, and meanwhile, the heat supply stability and flexibility are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat dissipation technology of data centers, in particular to a data center heat pipe backboard end composite cooling waste heat recovery system. BACKGROUND

[0002] As the engine and carrier of digital industry development, data centers are a kind of high energy consumption density buildings, and more than 90% of the huge amount of electricity consumed is finally converted into heat and discharged. Therefore, data centers can provide a large amount of low-grade waste heat to the outside world. This kind of waste heat is continuously produced throughout the year, with stable volume, mainly concentrated between 20 to 60℃, and is a kind of high-quality heat source. Most data centers usually use computer room air handling units (CRAH), for which the hot air in the data center is sucked into the CRAH unit in the computer room through a hot channel or directly, and exchanges heat with low-temperature chilled water in the chilled water system through a fan coil. Since the final heat grade is relatively low, at about 20℃-30℃, it cannot be fully utilized, resulting in a large amount of energy waste.

[0003] In recent years, some researchers have begun to focus on the development of data center waste heat recovery systems. At present, the cooling method of domestic data centers is still mainly air cooling system. However, the waste heat recovery system of the current air-cooled data center still needs to be equipped with an additional heat pump, a complex piping system and a lower system energy efficiency, which is difficult to effectively combine with the existing cooling system, has no significant economic benefits, and has a high construction difficulty. CONTENT OF THE INVENTION

[0004] According to one aspect of the present application, the present application discloses a data center heat pipe backboard end composite cooling waste heat recovery system, comprising a plurality of air conditioning backboards and at least one heat pipe circulating condenser; the outlet of the air conditioning backboard is connected with the evaporation end of the heat pipe circulating condenser, and the inlet of the air conditioning backboard is connected with the cooling end of the heat pipe circulating condenser;

[0005] The heat pipe circulating condenser is connected with two parallel cooling branches;

[0006] Among them, the first cooling branch is from the evaporation end of the heat pipe circulating condenser to the condensation end of the heat pipe circulating condenser through a compressor, a first valve, a compression circulating condenser and an expansion valve in sequence;

[0007] The second cooling branch is from the evaporation end of the heat pipe circulating condenser to the condensation end of the heat pipe circulating condenser through a compressor, a second valve and a water-fluorine heat exchanger in sequence;

[0008] The water-fluorine heat exchanger is connected with a heat pipe line.

[0009] Further, the hot water line comprises at least one hot water tank, the water outlet of the water-fluorine heat exchanger is connected with the upper part of the hot water tank, and the water inlet of the water-fluorine heat exchanger is connected with the lower part of the hot water tank.

[0010] Further, the hot water tank is provided with a heat preservation layer, and the lower part of the hot water tank is sequentially connected with the water inlet of the water-fluorine heat exchanger through a fourth valve and a water pump.

[0011] Further, a water supplement pipeline is arranged between the fourth valve and the water pump, and a fifth valve is arranged on the water supplement pipeline.

[0012] Further, the hot water tank is connected with a solar water heater through a water inlet pipe and a water outlet pipe, and the specific connection mode is that the bottom of the solar water heater is higher than the bottom of the hot water tank, the water inlet pipe is connected with the bottom of the hot water tank and the bottom of the solar water heater, and the water inlet pipe has an upward trend in the direction of the solar water heater; and the water outlet pipe is connected with the bottom of the hot water tank and the upper part of the solar water heater, and the water outlet pipe has an upward trend in the direction of the hot water tank.

[0013] It can be known from the technical scheme that the utility model provides an innovative solution, uses the efficient heat pipe backboard air conditioner to cool the data center, simultaneously uses the composite cooling waste heat recovery system to recover the waste heat of the data center, and combines the heat storage water tank to realize the supply of park heating and domestic hot water.

[0014] In addition, the application can also bring the following benefits:

[0015] By using the efficient heat pipe backboard air conditioner to cool the data center, the problem of low waste heat grade of the traditional air-cooled terminal is solved. Due to the short heat transfer distance, the heat pipe backboard air conditioner system has a higher heat grade in the waste heat recovery process, and the power consumption required to maintain the heat grade is reduced.

[0016] The waste heat recovery system and the heat pipe backboard air conditioner system are organically combined, and the problem of high complexity of the traditional waste heat recovery system is solved. By sharing the same compressor, the integration of the compression refrigeration cycle and the waste heat recovery cycle is realized, the system structure is simplified, the initial investment and construction complexity are reduced, and the universality of the system is improved.

[0017] The heat storage water tank is introduced, and the problem of unbalanced utilization of data center waste heat is solved. Due to the difference in heat load and domestic hot water demand of heat users in different seasons and time periods, the design of the heat storage water tank can adjust the system heat utilization, significantly improve the annual waste heat utilization rate and the stability of system operation. Combined with the solar water heater, the quality of hot water is further improved, and the problem of easy cracking of the solar water heater in winter in the north is solved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only represent some of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor under the premise of the accompanying drawings.

[0019] Figure 1 It is a structure diagram of a data center heat pipe backboard end composite cooling waste heat recovery system.

[0020] Figure 2 It is a solar connection schematic diagram in an embodiment of the present application

[0021] In the figure: 0, host computer; 1, heat pipe circulation condenser; 11, heat pipe circulation condenser evaporation end; 12, heat pipe circulation condenser condensation end; 2, air conditioner backboard; 31, heat pipe circulation gas pipe; 32, heat pipe circulation liquid pipe; 4, compressor; 51, first valve; 52, second valve; 53, expansion valve; 54, fourth valve; 55, fifth valve; 6, compression circulation condenser; 7, water-fluorine heat exchanger; 8, water pump; 9, hot water tank; 10, heat-using building; 100, solar water heater; 101, drain pipe; 102, water inlet pipe. DETAILED DESCRIPTION

[0022] In order to make the person skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments only represent some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0023] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described accompanying drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0024] Embodiment 1

[0025] A data center heat pipe backplane end composite cooling waste heat recovery system adopts heat pipe backplane air conditioner refrigeration, the heat pipe backplane air conditioner contains several air conditioner backplanes 2 and at least one heat pipe circulation condenser 1, the outlet on the air conditioner backplane 2 is connected with the heat pipe circulation condenser evaporation end 11 through the heat pipe circulation gas pipe 31, and the inlet of the air conditioner backplane 2 is connected with the heat pipe circulation condenser cooling end 12.

[0026] The heat pipe circulation condenser 1 is connected with two parallel cooling branches.

[0027] The first cooling branch is from the heat pipe circulation condenser evaporation end 11 to the compressor 4, the first valve 51, the compression circulation condenser 6, the expansion valve 53 and back to the heat pipe circulation condenser cooling end 12.

[0028] The second cooling branch is from the heat pipe circulation condenser evaporation end 11 to the compressor 4, the second valve 52, the water-fluorine heat exchanger 7 and back to the heat pipe circulation condenser cooling end 12.

[0029] The water-fluorine heat exchanger 7 is connected with a heat utilization pipe, and the heat utilization pipe includes at least one hot water tank 9, the water outlet of the water-fluorine heat exchanger 7 is connected with the upper part of the hot water tank 9, and the water inlet of the water-fluorine heat exchanger 7 is connected with the lower part of the hot water tank 9.

[0030] In order to prevent heat loss, the hot water tank 9 is provided with a heat preservation layer, and the lower part of the hot water tank 9 is connected with the water inlet of the water-fluorine heat exchanger 7 through the fourth valve 54 and the water pump 8.

[0031] In this embodiment, a water supplement pipe can be installed at the bottom of the hot water tank 9 to inject cold water into the hot water tank 9, and the cold water stays in the lower layer due to its high density. At this time, the cold water can be injected into the water-fluorine heat exchanger 7 by only opening the fourth valve 54 and the water pump 8, and the heat exchange is performed, and the heated water returns from the upper end of the hot water tank 9. The temperature sensing device and the water level sensing device can be arranged in the hot water tank, and the water supplement can be controlled manually or intelligently. The hot water is taken from the upper end by the water taking pipe (such as a soft pipe with a float) suspended in the liquid surface, and the water taking pipe is connected with the pipeline of the hot water for daily use (i.e. the heat utilization pipe).

[0032] In operation, the heat generated by the main machine 0 during operation is taken out from the cabinet interior by forced convection through the fan on the air conditioner backplane 2. In this embodiment, the fan is installed on the side far away from the main machine 0, and the blowing direction is also towards the side far away from the main machine 0. The temperature of the hot air is significantly reduced after passing through the air conditioner backplane 2, the refrigerant (Freon refrigerant is adopted in this embodiment) of the air conditioner backplane 2 absorbs heat and evaporates into gas state along the heat pipe circulation gas pipe 31 into the heat pipe circulation condenser evaporation end 11 of the heat pipe circulation condenser 1, and the temperature is reduced through one or a combination of two cooling branches.

[0033] Two cooling branches correspond to two refrigeration modes: compression refrigeration mode and waste heat recovery mode.

[0034] In summer, when the external environment temperature is high or the heat storage tank 9 is full, the system can select the first cooling branch to enter the compression refrigeration mode. At this time, the first valve 51 is opened, and the second valve 52 remains closed. The gaseous refrigerant becomes high-temperature and high-pressure liquid refrigerant through the compressor 4, the high-temperature and high-pressure liquid refrigerant goes to the compression cycle condenser 6, and the compression cycle condenser 6 discharges high-temperature air to the atmosphere through the fan. The liquid refrigerant is throttled by the expansion valve 53 installed near the air conditioner back plate 2 to absorb a large amount of heat and achieve the cooling of the air conditioner back plate 2.

[0035] In winter, when the external environment temperature is low or there is a demand for useful heat in the office area, the system switches to the waste heat recovery mode. At this time, the first valve 51 remains closed, and the second valve 52 is opened. The refrigerant is transported by the compressor 4 to the water-fluorine heat exchanger 7, which heats the low-temperature hot water provided by the heat storage tank 9 and delivers the high-temperature hot water back to the heat storage tank 9, achieving cooling. The heat storage tank 9 is used to store the waste heat generated by the data center, and the heat user can take the required heat from the heat storage tank 9 according to the demand, so as to realize the demand for heating or domestic hot water at different time periods. In addition, the heat storage tank 9 can be connected with the municipal hot water system or the domestic hot water system, so as to improve the overall heat utilization rate of the system.

[0036] In other embodiments, in order to utilize heat more effectively, a water supplement pipeline can also be provided between the fourth valve 54 and the water pump 8, and a fifth valve 55 is provided on the water supplement pipeline. The water supplement pipeline is directly connected with the domestic cold water pipeline. When supplementing water, the fourth valve 54 is closed, and the fifth valve 55 is opened. The domestic cold water is directly pumped into the water-fluorine heat exchanger 7 by using the water pressure of the cold water pipeline or by adding a pressure pump, and then returned to the heat storage tank 9 after being heated. Obviously, this water supplement scheme will cause the temperature of the water in the heat storage tank 9 to drop, but it can improve the heat exchange efficiency of the water-fluorine heat exchanger 7.

[0037] Embodiment 2

[0038] As shown in Figure 2 In order to overcome the problem that the water temperature in the heat storage tank 9 is not high enough in embodiment 1, the heat storage tank 9 is connected with a solar water heater 100 through a drain pipe 101 and an inlet pipe 102 in this embodiment. The specific connection mode is that the bottom of the solar water heater 100 is higher than the bottom of the heat storage tank 9, the inlet pipe 102 is connected with the bottom of the heat storage tank 9 and the bottom of the solar water heater 100, and the inlet pipe 102 shows an upward trend in the direction towards the solar water heater 100; the drain pipe 101 is connected with the bottom of the heat storage tank 9 and the upper part of the solar water heater 100, and the drain pipe 101 shows an upward trend in the direction towards the heat storage tank 9.

[0039] It should be noted that in the technical solution of the embodiment, the solar water heater 100 is only connected with the drain pipe 101 and the water inlet pipe 102, and still retains the water replenishing pipe and the water taking pipe (not shown in the figure). Therefore, during the water replenishing process of the solar water heater 100, the excess water will be discharged into the hot water tank 9. At this time, the overflow pipe of the solar water heater 100 can be cancelled, and a gas discharge device is added to the upper end of the hot water tank 9. The height of the drain pipe 101 should be higher than the highest liquid level position of the hot water tank 9 to prevent the hot water in the tank from flowing back. At the same time, the connection position of the drain pipe 101 and the hot water tank 9 should not be too high, and is preferably lower than the liquid level of the normal water storage level of the hot water tank 9.

[0040] The beneficial effect of the embodiment is that when the temperature is high in summer, the hot water in the solar water heater 100 has a small density, which will enter the hot water tank 9 through the drain pipe 101, preventing the solar water heater from boiling. When it is cloudy in winter, the water temperature in the hot water tank 9 is higher than that in the lower part of the solar water heater 100, especially in the pipeline. The hot water will enter the solar water heater 100 through the water inlet pipe 102, preventing the pipeline from freezing and cracking.

[0041] In other embodiments, in order to enhance the water exchange effect between the solar water heater 100 and the hot water tank 9, a water pump can be added to the water inlet pipe 102 to pump the hot water at the lower temperature at the bottom of the hot water tank 9 into the solar water heater 100. The specific setting here is a conventional means, which will not be described in detail.

[0042] The above is only a preferred embodiment of the present application, and does not limit the technical scope of the present application. In the case of no conflict, the embodiments in the application and the features in the embodiments can be combined with each other. Therefore, any slight modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments still belong to the scope of the technical solution of the present application.

Claims

1. A data center heat pipe backplane end composite cooling waste heat recovery system, characterized in that, The air conditioner back plate is connected with the evaporating end of the heat pipe circulation condenser, and the inlet of the air conditioner back plate is connected with the cooling end of the heat pipe circulation condenser. The heat pipe circulation condenser is connected with two parallel cooling branches. The first cooling branch is sequentially connected with the evaporating end of the heat pipe circulation condenser, a compressor, a first valve, a compression circulation condenser, an expansion valve and the condensing end of the heat pipe circulation condenser. The second cooling branch is sequentially connected with the evaporating end of the heat pipe circulation condenser, a compressor, a second valve, a water-fluorine heat exchanger and the condensing end of the heat pipe circulation condenser. The water-fluorine heat exchanger is connected with a heat pipe line.

2. A data center hot pipe backplane end composite cooling waste heat recovery system as claimed in claim 1, wherein, The heat pipe line comprises at least one hot water tank, the water outlet of the water-fluorine heat exchanger is connected with the upper part of the hot water tank, and the water inlet of the water-fluorine heat exchanger is connected with the lower part of the hot water tank.

3. A data center hot aisle backboard end composite cooling waste heat recovery system as claimed in claim 2, wherein, The hot water tank is provided with a heat preservation layer, and the lower part of the hot water tank is sequentially connected with the water inlet of the water-fluorine heat exchanger through a fourth valve and a water pump.

4. A data center hot aisle backboard end composite cooling waste heat recovery system as claimed in claim 3, wherein, A water supplement pipeline is arranged between the fourth valve and the water pump, and a fifth valve is arranged on the water supplement pipeline.

5. A data center hot aisle backboard end composite cooling waste heat recovery system according to any one of claims 2-4, wherein, The hot water tank is connected with a solar water heater through a water outlet pipe and a water inlet pipe, and the specific connection mode is that the bottom of the solar water heater is higher than the bottom of the hot water tank, the water inlet pipe is connected with the bottom of the hot water tank and the bottom of the solar water heater, and the water inlet pipe presents an upward trend along the direction towards the solar water heater; the water outlet pipe is connected with the bottom of the hot water tank and the upper part of the solar water heater, and the water outlet pipe presents an upward trend along the direction towards the hot water tank.

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