Heat supply system based on data center waste heat recovery

Abstract

The utility model relates to a heat supply system based on waste heat recovery of a data center, relates to the technical field of waste heat recovery, and is used for solving the problems of low waste heat recovery utilization rate, unstable long-distance heat supply and low cost performance of the data center in the prior art. The utility model discloses a heat supply system based on data center waste heat recovery. The heat supply system comprises a waste heat recovery heat exchanger, a heat pump unit, a water path conversion valve, a circulating pump and a cross-seasonal heat storage device. The water path conversion valve comprises a first two-way valve, a second two-way valve, a third two-way valve, a fourth two-way valve, a fifth two-way valve and a sixth two-way valve. According to the utility model, the waste heat of the data center can be conveniently utilized for regional heat supply or remote heat supply, and the waste heat recovery utilization rate is improved.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, and in particular to a heating system based on waste heat recovery from data centers. Background Technology

[0002] Data center waste heat refers to the heat generated by IT equipment (including servers, switches, storage devices, etc.) during data center operation. After being processed by the cooling system, the heat is discharged from the data center in the form of cooling water or condensation heat. Recovering waste heat from data centers not only reduces the operational pressure and energy consumption of the cooling system, lowering operating costs, but also converts this waste heat into thermal energy to provide heating services for surrounding buildings. This effectively reduces the energy consumption required for heating, saves heating costs, and thus supports the country's goal of achieving "dual carbon" emissions.

[0003] In existing technologies, waste heat recovery and utilization in data centers is mostly limited to self-sufficiency within the campus. Due to the relatively small amount of heat used, the amount of waste heat recovered and utilized, and its proportion of the total waste heat, is extremely low. Some projects have attempted to use various methods to achieve long-distance waste heat recovery and reuse; however, due to the instability of the heat load and the increase in multiple stages of upgrading, the security risks to data center operations have increased. In addition, the overall system's power consumption has increased, resulting in poor economic efficiency and unsatisfactory system adaptability, making it unsuitable for long-distance heating. Utility Model Content

[0004] Based on the above analysis, this utility model aims to provide a heating system based on data center waste heat recovery, in order to solve the problems of low waste heat recovery utilization rate, unstable long-distance heating, and low cost performance in the existing technology.

[0005] The objective of this utility model is mainly achieved through the following technical solutions:

[0006] This utility model provides a heating system based on data center waste heat recovery, including a waste heat recovery heat exchanger, a heat pump unit, a water circuit switching valve, a circulating pump, and a cross-seasonal heat storage device;

[0007] The water circuit switching valves include two-way valve No. 1, two-way valve No. 2, two-way valve No. 3, two-way valve No. 4, two-way valve No. 5 and two-way valve No. 6;

[0008] When the No. 2 two-way valve and the No. 5 two-way valve are in the open state, a closed loop is formed between the waste heat recovery heat exchanger and the interseasonal heat storage device;

[0009] When the No. 1 two-way valve, the No. 3 two-way valve, the No. 4 two-way valve, and the No. 6 two-way valve are in the open state, the inter-seasonal heat storage device and the waste heat recovery heat exchanger are connected in parallel to form a closed loop with the heat pump unit.

[0010] Furthermore, the heat pump unit includes an evaporator, the No. 2 two-way valve is installed on the inlet water pipe between the inter-seasonal heat storage devices, and the No. 5 two-way valve is used to control the connection between the inlet water pipe and the outlet water pipe of the evaporator.

[0011] Furthermore, the No. 1 two-way valve is installed on the outlet pipe of the inter-seasonal thermal storage device, and the No. 3 two-way valve is installed on the inlet pipe of the circulating pump.

[0012] Furthermore, the No. 4 two-way valve is installed on the water outlet pipe of the evaporator, and the No. 6 two-way valve is installed on the water inlet pipe of the evaporator.

[0013] Furthermore, the waste heat recovery heat exchanger can be connected to the cross-seasonal heat storage device through the water circuit switching valve to form a heat storage loop.

[0014] Furthermore, the heat pump unit can be connected to the interseasonal heat storage device and the waste heat recovery heat exchanger through a water circuit switching valve to form a heating loop.

[0015] Furthermore, it also includes a regulating valve connected to the waste heat recovery heat exchanger.

[0016] Furthermore, the waste heat recovery heat exchanger is a plate heat exchanger.

[0017] Furthermore, the cross-seasonal thermal storage device is a buried pipe heat exchanger.

[0018] Furthermore, the interseasonal thermal storage device is buried at a depth of not less than 600 mm below the frozen soil.

[0019] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0020] (1) The heating system based on data center waste heat recovery of this utility model realizes the closed loop between the waste heat recovery heat exchanger and the cross-seasonal heat storage device by setting a water circuit switching valve. This allows the waste heat generated by the data center cooling device to be recovered by the waste heat recovery heat exchanger and continuously stored in the cross-seasonal heat storage device, effectively storing the heat source and realizing the recovery and storage of the data center waste heat throughout the year. This is conducive to the efficient use of energy and the realization of energy conservation and emission reduction.

[0021] (2) By connecting the cross-seasonal heat storage device and the waste heat recovery heat exchanger in parallel, a closed loop is formed with the heat pump unit, so that the cross-seasonal heat storage device and the waste heat recovery heat exchanger can jointly provide heat source for the heat pump unit, and the heat supply of the cross-seasonal heat storage device and the waste heat recovery heat exchanger can be allocated according to the heat consumption at the end, thereby efficiently utilizing and allocating energy.

[0022] (3) The water pumps of the circulating pump and heat pump unit can allocate the heat source of the cross-seasonal heat storage device and the waste heat recovery heat exchanger to realize the medium and long distance heat supply and distribution, thereby facilitating the use of the waste heat of the data center for regional heating or long-distance heating and improving the waste heat recovery utilization rate.

[0023] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing this invention. The objectives and other advantages of this invention can be realized and obtained from the details specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0024] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0025] Figure 1 This is a schematic diagram of the composition and structure of the heating system based on data center waste heat recovery according to this utility model;

[0026] Figure 2 This is a schematic diagram of the composition and structure of the water circuit switching valve of this utility model.

[0027] Figure label:

[0028] 1-Data center cooling unit; 11-Cooling tower; 12-Cooling unit; 13-Free cooling plate; 14-Cooling water circulation pump; 2-Waste heat recovery heat exchanger; 3-Regulating valve; 4-Heat pump unit; 41-Evaporator; 42-Condenser; 51-No. 1 two-way valve; 52-No. 2 two-way valve; 53-No. 3 two-way valve; 54-No. 4 two-way valve; 55-No. 5 two-way valve; 56-No. 6 two-way valve; 6-Circulation pump; 7-Inter-seasonal heat storage device; 71-Secondary manifold; 72-Heat exchange hole. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0030] A specific embodiment of this utility model discloses a heating system based on waste heat recovery from a data center, such as... Figure 1As shown, it includes a waste heat recovery heat exchanger 2, a heat pump unit 4, a water circuit switching valve, a circulating pump 6, and a cross-seasonal heat storage device 7. The waste heat recovery heat exchanger 2 can be connected to the cross-seasonal heat storage device 7 through the water circuit switching valve to form a heat storage loop. The heat pump unit 4 can also be connected to the cross-seasonal heat storage device 7 and the waste heat recovery heat exchanger 2 through the water circuit switching valve to form a heating loop.

[0031] For example, the waste heat recovery heat exchanger 2 is a plate heat exchanger, which is existing technology and will not be described in detail here.

[0032] For example, the interseasonal heat storage device 7 is a buried pipe heat exchanger, including a secondary manifold 71 and heat exchange holes 72. The interseasonal heat storage device 7 can achieve interseasonal heat storage by utilizing the heat storage capacity of the soil. The buried pipe heat exchanger is prior art and will not be described in detail here.

[0033] Preferably, the cross-seasonal thermal storage device 7 is buried at a depth of not less than 600 mm below the frozen soil.

[0034] Heat pump unit 4 uses existing heat pump units, including evaporator 41 and condenser 42. Heat pump unit 4 is existing technology and will not be described in detail here.

[0035] like Figure 2 As shown, the water circuit switching valves include two-way valve 51 (No. 1), two-way valve 52 (No. 2), two-way valve 53 (No. 3), two-way valve 54 (No. 4), two-way valve 55 (No. 5), and two-way valve 56 (No. 6). Two-way valve 51 (No. 1) is installed on the outlet pipe of the inter-seasonal heat storage device 7, two-way valve 52 (No. 2) is installed on the inlet pipe of the inter-seasonal heat storage device 7, two-way valve 53 (No. 3) is installed on the inlet pipe of the circulating pump 6, two-way valve 54 (No. 4) is installed on the outlet pipe of the evaporator 41, two-way valve 55 (No. 5) is used to control the connection between the inlet pipe and the outlet pipe of the evaporator 41, and two-way valve 56 (No. 6) is installed on the inlet pipe of the evaporator 41.

[0036] During the non-heating season (such as summer), two-way valves 52 (No. 2) and 55 (No. 5) are kept open, while two-way valves 51 (No. 1), 53 (No. 3), 54 (No. 4), and 56 (No. 6) are kept closed. The hot water generated by the data center cooling unit 1 is recovered by the waste heat recovery heat exchanger 2 and then flows through two-way valve 52 into the interseasonal heat storage unit 7 under the action of the circulation pump 6. From there, it flows back to the waste heat recovery heat exchanger 2 via the circulation pump 6 and two-way valve 55, thus achieving a closed-loop circulation between the waste heat recovery heat exchanger 2 and the interseasonal heat storage unit 7. This ensures that the waste heat generated by the data center cooling unit 1 is continuously stored in the interseasonal heat storage unit 7 after being recovered by the waste heat recovery heat exchanger 2.

[0037] The data center cooling device 1 is existing technology and includes a cooling tower 11, a cooling unit 12, a free cooling plate 13 and a cooling water circulation pump 14, which will not be described in detail here.

[0038] During the heating season (such as winter), valves 52 and 55 are closed, while valves 51, 53, 54, and 56 are open. On one hand, the hot water generated by the data center cooling unit 1 is recovered by the waste heat recovery heat exchanger 2 and then flows into the evaporator 41 through valves 53 and 56 under the action of the circulating pump 6. It then flows back to the waste heat recovery heat exchanger 2 through valve 54, forming a closed loop between the waste heat recovery heat exchanger 2 and the heat pump unit 4. On the other hand, the heat source stored in the interseasonal heat storage device 7 enters the evaporator 41 through valve 56 under the action of the circulating pump 6, and then flows back to the interseasonal heat storage device 7 through valves 54 and 51, thus forming a closed loop between the interseasonal heat storage device 7 and the heat pump unit 4. By controlling the opening and closing of the water circuit switching valve, the waste heat recovery heat exchanger 2 and the inter-seasonal heat storage device 7 are connected in parallel and form a closed loop with the heat pump unit 4, which together provide a heat source for the heat pump unit 4, enabling the heat pump unit 4 to provide heating for the data center and other buildings.

[0039] Preferred, such as Figure 1 As shown, the heating system based on data center waste heat recovery also includes a regulating valve 3, which is connected to the waste heat recovery heat exchanger 2 and is used to control the flow rate of the waste heat recovery heat exchanger 2, thereby facilitating the regulation of the flow rate of the waste heat recovery heat exchanger 2.

[0040] By controlling the regulating valve 3 and the water circuit switching valve, the heat supply of the inter-seasonal heat storage device 7 and the waste heat recovery heat exchanger 2 can be adjusted according to the heat supply at the end, thereby efficiently utilizing and allocating energy.

[0041] Compared with existing technologies, the heating system based on data center waste heat recovery of this utility model achieves a closed loop between the waste heat recovery heat exchanger 2 and the interseasonal heat storage device 7 by setting a water circuit switching valve. This allows the waste heat generated by the data center cooling device 1 to be continuously stored in the interseasonal heat storage device 7 after being recovered by the waste heat recovery heat exchanger 2, effectively storing the heat source and achieving year-round recovery and storage of waste heat from the data center. This promotes efficient energy utilization and achieves energy conservation and emission reduction. By connecting the interseasonal heat storage device 7 and the waste heat recovery heat exchanger 2 in parallel to form a closed loop with the heat pump unit 4, the interseasonal heat storage device 7 and the waste heat recovery heat exchanger 2 can jointly provide a heat source for the heat pump unit 4. Furthermore, the heat supply from the interseasonal heat storage device 7 and the waste heat recovery heat exchanger 2 can be adjusted according to the heat demand at the end-user, thereby achieving efficient energy utilization and allocation. The water pumps of the circulating pump 6 and the heat pump unit 4 can allocate the heat source of the cross-seasonal heat storage device 7 and the waste heat recovery heat exchanger 2 to realize medium and long-distance heat supply and distribution, thereby facilitating the use of the waste heat of the data center for regional heating or long-distance heating and improving the waste heat recovery and utilization rate.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heat supply system based on data center waste heat recovery, characterized in that, The heat recovery heat exchanger (2), the heat pump unit (4), the water path conversion valve, the circulating pump (6) and the cross-season heat storage device (7) are included. The water path conversion valve includes a No. 1 two-way valve (51), a No. 2 two-way valve (52), a No. 3 two-way valve (53), a No. 4 two-way valve (54), a No. 5 two-way valve (55) and a No. 6 two-way valve (56). When the No. 2 two-way valve (52) and the No. 5 two-way valve (55) are in an open state, a closed cycle is formed between the heat recovery heat exchanger (2) and the cross-season heat storage device (7). When the No. 1 two-way valve (51), the No. 3 two-way valve (53), the No. 4 two-way valve (54) and the No. 6 two-way valve (56) are in an open state, the cross-season heat storage device (7) is connected in parallel with the heat recovery heat exchanger (2) and then forms a closed cycle with the heat pump unit (4).

2. The data center waste heat recovery based heating system of claim 1, wherein, The heat pump unit (4) includes an evaporator (41), the No. 2 two-way valve (52) is arranged on a water inlet pipeline of the cross-season heat storage device (7), and the No. 5 two-way valve (55) is used to control the communication between a water inlet pipeline and a water outlet pipeline of the evaporator (41).

3. The data center waste heat recovery based heating system of claim 2, wherein, The No. 1 two-way valve (51) is arranged on a water outlet pipeline of the cross-season heat storage device (7), and the No. 3 two-way valve (53) is arranged on a water inlet pipeline of the circulating pump (6).

4. The data center waste heat recovery based heating system of claim 3, wherein, The No. 4 two-way valve (54) is arranged on a water outlet pipeline of the evaporator (41), and the No. 6 two-way valve (56) is arranged on a water inlet pipeline of the evaporator (41).

5. The data center waste heat recovery based heating system of claim 1, wherein, The heat recovery heat exchanger (2) can be connected in communication with the cross-season heat storage device (7) through the water path conversion valve to form a heat storage loop.

6. The data center waste heat recovery based heating system of claim 1, wherein, The heat pump unit (4) can be connected in communication with the cross-season heat storage device (7) and / or the heat recovery heat exchanger (2) through the water path conversion valve to form a heat supply loop.

7. The data center waste heat recovery based heating system according to any one of claims 1-6, wherein, An adjusting valve (3) is further included, and the adjusting valve (3) is connected with the heat recovery heat exchanger (2).

8. The data center waste heat recovery based heating system of claim 7, wherein, The heat recovery heat exchanger (2) is a plate heat exchanger.

9. The data center waste heat recovery based heating system of claim 7, wherein, The cross-season heat storage device (7) is a ground heat exchanger.

10. The data center waste heat recovery based heating system of claim 9, wherein, The cross-season heat storage device (7) is buried below the frozen soil by not less than 600 mm.

Images