Waste heat recovery data center based on AHU refrigeration architecture

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By setting up an independent waste heat recovery area and hot return air mezzanine in the data center building, combining a centralized heat pump unit and a waste heat recovery heat exchanger, the problems of small heat exchange area, increased wind resistance and system instability in the AHU refrigeration system are solved, achieving efficient and safe waste heat recovery and stable refrigeration, with economic benefits.

CN223415150UActive Publication Date: 2025-10-03HEBEI QINHUAI DATA CO LTD

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Patent Information

Application Number: CN202422595866.3
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-10-26
Publication Date: 2025-10-03
Estimated Expiration: 2034-10-26

AI Technical Summary

Technical Problem

Existing technology for waste heat recovery based on AHU refrigeration systems in data centers has problems such as small heat exchange area, increased wind resistance, high power consumption, system instability, and difficult maintenance. In particular, when the recovery device is installed in a small space, there is a risk of high temperature in the computer room due to leakage or component replacement.

Method used

By setting up an independent waste heat recovery area and hot return air mezzanine in the data center building, waste heat recovery is physically isolated from the AHU cooling system. Centralized heat pump units and waste heat recovery heat exchangers are used to achieve efficient recovery and stable transmission of waste heat, and the redundant safety of the system is ensured through the suspended ceiling design.

Benefits of technology

It achieves a large proportion of waste heat recovery, reduces the energy and water consumption of the data center, improves the system's cooling redundancy safety and stability, reduces fan power consumption and maintenance frequency, provides a backup cooling source, and has economic benefits.

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Abstract

The waste heat recovery data center based on the AHU refrigeration framework comprises an AHU refrigeration unit, a data machine room and a waste heat recovery system, the data machine room is divided into an upper layer and a lower layer through a suspended ceiling, the upper layer comprises a waste heat recovery area and a hot air return interlayer, the lower layer comprises an air supply area and a cabinet area, the waste heat recovery area is located above the air supply area, and the hot air return interlayer is located above the cabinet area. The hot air return interlayer is located above the cabinet area, the air supply area is communicated with the cabinet area through an air supply port, the cabinet area is communicated with the hot air return interlayer through a suspended ceiling, and the hot air return interlayer is communicated with the waste heat recovery area through an air return port; an air supply pipe of the AHU refrigerating unit is connected with the air supply area, and an air return pipe of the AHU refrigerating unit is connected with the waste heat recovery area; a waste heat recovery heat exchanger is installed in the waste heat recovery area and connected with a waste heat recovery system through a pipeline. The AHU refrigerating unit is combined with a machine room building, the problem of large-proportion waste heat recovery is solved, and meanwhile the refrigerating redundancy safety and robustness of the system are improved.

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Description

Technical Field

[0001] The present application relates to the field of data center heat recovery technology, and in particular to a waste heat recovery data center based on an AHU refrigeration architecture. Background Art

[0002] With the introduction of the national new infrastructure and East-West Computing strategies, the data center industry is experiencing numerous positive developments. However, the rapid development of data centers has also brought about the issue of high energy consumption. Consequently, data center requirements for PUE (Power Usage Effectiveness) continue to decline. Air conditioning and cooling systems are a critical component of high-energy consumption in data centers. To reduce data center energy consumption and fully utilize natural cooling sources, the industry has adopted a variety of different air conditioning and cooling system architectures, including water-cooled systems, indirect evaporative cooling systems with AHUs (Air Handling Units), liquid cooling systems, and multi-connected heat pipe systems. Furthermore, to effectively utilize waste heat from data centers, data center waste heat recovery technology is gradually gaining attention from industry professionals.

[0003] Since the application of waste heat recovery technology must fully consider the characteristics of the data center industry and focus on safety and availability, and the waste heat recovery technology of the water cooling system is relatively mature, it only requires expanding the space of a part of the water source heat pump unit on the basis of the original refrigeration station and considering the rationality of the pipeline layout and connection. Therefore, in the data center industry, waste heat recovery projects are mostly based on the water cooling system architecture, and rarely focus on the feasibility of solutions based on air heat recovery. Utility Model Content

[0004] To solve existing technical problems, the present invention provides a waste heat recovery data center based on an AHU refrigeration architecture. The technical solution is as follows:

[0005] First, a waste heat recovery data center based on the AHU refrigeration architecture is provided, including AHU refrigeration units, data centers, and waste heat recovery systems:

[0006] The data room is divided into two floors by a suspended ceiling, the upper floor includes a waste heat recovery area and a hot return air mezzanine, and the lower floor includes an air supply area and a cabinet area, the waste heat recovery area is located above the air supply area, the hot return air mezzanine is located above the cabinet area, the air supply area is connected to the cabinet area through an air supply vent, the cabinet area is connected to the hot return air mezzanine through the suspended ceiling, and the hot return air mezzanine is connected to the waste heat recovery area through a return air vent;

[0007] The air supply pipe of the AHU refrigeration unit is connected to the air supply area, and the return air pipe of the AHU refrigeration unit is connected to the waste heat recovery area;

[0008] A waste heat recovery heat exchanger is installed in the waste heat recovery area, and the waste heat recovery heat exchanger is connected to the waste heat recovery system through a pipeline.

[0009] Furthermore, the waste heat recovery system includes a magnetic levitation compressor, a condenser and a heat storage tank, wherein the condenser is arranged in the heat storage tank;

[0010] The liquid outlet of the waste heat recovery heat exchanger is connected to the magnetic levitation compressor, the magnetic levitation compressor is connected to the liquid inlet of the condenser, and the liquid outlet of the condenser is connected to the liquid inlet of the waste heat recovery heat exchanger.

[0011] Furthermore, the waste heat recovery system includes a heat pump unit on the heat source side, a circulating pump on the heat source side, a heat storage tank and a circulating pump on the load side;

[0012] The liquid outlet of the waste heat recovery heat exchanger is connected to the liquid inlet of the heat source side circulation pump, the liquid outlet of the heat source side circulation pump is connected to the liquid inlet of the evaporator of the heat source side heat pump unit, and the liquid outlet of the evaporator of the heat source side heat pump unit is connected to the liquid inlet of the waste heat recovery heat exchanger;

[0013] The liquid outlet of the condenser of the heat source side heat pump unit is connected to the liquid inlet of the heat storage tank on the heat source side, the liquid outlet of the heat storage tank on the heat source side is connected to the liquid inlet of the load side circulation pump, and the liquid outlet of the load side circulation pump is connected to the liquid inlet of the condenser of the heat source side heat pump unit.

[0014] Furthermore, a fan is installed in the waste heat recovery area, and the waste heat recovery heat exchanger is installed between the fan and the return air outlet.

[0015] Furthermore, the waste heat recovery heat exchanger includes a microchannel heat exchanger or a fin-tube heat exchanger.

[0016] Furthermore, the working medium flowing inside the pipeline includes Freon or water.

[0017] Furthermore, a heat channel is provided in the ceiling between the cabinet area and the hot return air interlayer.

[0018] Furthermore, cabinets are installed in the cabinet area, the cabinets are closely arranged in a row, the exhaust air between the two rows of cabinets is opposite, and the heat channel is arranged between the two rows of cabinets.

[0019] Furthermore, at least one waste heat recovery heat exchanger is installed in the waste heat recovery area.

[0020] Furthermore, the data room is a diffused room.

[0021] The beneficial effects of the technical solution provided by the embodiments of the present application are:

[0022] In an embodiment of the present application, a waste heat recovery data center based on an AHU refrigeration architecture includes an AHU refrigeration unit, a data room and a waste heat recovery system: the data room is divided into two upper and lower layers by a suspended ceiling, the upper layer includes a waste heat recovery area and a hot return air mezzanine, and the lower layer includes a supply air area and a cabinet area, the waste heat recovery area is located above the supply air area, the hot return air mezzanine is located above the cabinet area, the supply air area is connected to the cabinet area through an air supply outlet, the cabinet area is connected to the hot return air mezzanine through a suspended ceiling, and the hot return air mezzanine is connected to the waste heat recovery area through a return air outlet; the supply air duct of the AHU refrigeration unit is connected to the supply air area, and the return air duct of the AHU refrigeration unit is connected to the waste heat recovery area; a waste heat recovery heat exchanger is installed in the waste heat recovery area, and the waste heat recovery heat exchanger is connected to the waste heat recovery system through a pipeline. This application combines the AHU refrigeration unit with the computer room building. By setting up an independent waste heat recovery area, the waste heat recovery is physically isolated from the AHU refrigeration unit, solving the problem of large-scale waste heat recovery while improving the system's refrigeration redundancy safety and robustness. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 This is a structural diagram of an AC / DC power distribution system for a data center provided in an embodiment of the present application;

[0025] Figure 2 This is a schematic diagram of a waste heat recovery data center based on an AHU refrigeration architecture provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0027] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0028] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0029] In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. The terms "installed", "set", "provided with", "connected", "sliding connection", "fixed", and "sleeved" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "plurality" refers to two or more.

[0030] Currently, innovations in data center AHU waste heat recovery are primarily focused on system principles, but there's been no practical research and development tailored to the specific needs of data center AHU cooling systems. For waste heat recovery using complete air-source heat pump units, the return air system incorporates a heat pump unit. The localized airflow disturbances generated by the heat pump unit during operation affect the AHU system's return air, causing fluctuations in the AHU cooling system and leading to unstable air supply.

[0031] In addition, the existing focus on recovering waste heat from AHUs is to install heat recovery devices inside the equipment or inside the return air duct. This approach has the following problems:

[0032] The waste heat recovery device is installed before the heat exchange core. Since this method is limited by the size of the equipment or the size of the pipeline, the heat exchange area of the heat recovery device is too small and the waste heat of the computer room cannot be fully recovered. When the recovery device is installed inside the equipment or on the air duct, the resistance of the heat exchange surface increases significantly under higher headwind speeds, resulting in an increase in the fan pressure head and excessive power consumption. The selection of the original AHU fan becomes more difficult and the size is too large. The waste heat recovery device is installed after the heat exchanger core. Due to the pre-cooling of the heat exchange core, the heat reaching the waste heat recovery compressor is limited, resulting in too low recovery efficiency. Once the heat exchange surface installed in a small space has problems such as leakage or component replacement, the AHU equipment needs to be shut down for maintenance, which can easily result in the computer room having no refrigeration unit backup or insufficient cooling of the refrigeration unit, leading to the risk of high temperature in the computer room.

[0033] This application fully considers the characteristics of the data center system using AHU as the cooling method, combines the AHU cooling system with the data center building, and physically isolates the waste heat recovery from the AHU cooling system by setting up an independent waste heat recovery site.

[0034] like Figure 1 As shown, an embodiment of the present application provides a waste heat recovery data center based on an AHU refrigeration architecture, including: an AHU refrigeration unit 1, a data room 2 and a waste heat recovery system 3.

[0035] Data room 2 is divided into two floors by a suspended ceiling 205. The upper floor includes a waste heat recovery area 204 and a hot return air mezzanine 203, while the lower floor includes a supply air area 201 and a cabinet area 202. The waste heat recovery area 204 is located above the supply air area 201, and the hot return air mezzanine 203 is located above the cabinet area 202.

[0036] The air supply pipe 101 of the AHU refrigeration unit 1 is connected to the air supply area 201 , and the air supply area 201 is connected to the cabinet area 202 through the air supply port 205 on the other side.

[0037] A heat channel is provided in the suspended ceiling 205 between the cabinet area 202 and the hot return air mezzanine 203. The cabinet area 202 is connected to the hot return air mezzanine 203 through the suspended ceiling 205. Cabinets 4 are installed in the cabinet area 202, closely arranged in a row. The exhaust air between the two rows of cabinets 4 faces each other, and a heat channel is provided between the two rows of cabinets 4.

[0038] The hot return air interlayer 203 is connected to the waste heat recovery area 204 through the return air port 206. A waste heat recovery heat exchanger 207 and a fan 208 are installed in the waste heat recovery area 204, and the waste heat recovery heat exchanger 207 is installed between the fan 208 and the return air port 206.

[0039] The return air duct 102 of the AHU refrigeration unit 1 is connected to the waste heat recovery area 204, forming a complete cooling air circulation for the machine room.

[0040] The waste heat recovery heat exchanger 207 is also connected to the waste heat recovery system 3 through a pipeline. The waste heat recovery system 3 includes a magnetic levitation compressor 301, a condenser 302 and a heat storage tank 303, and the condenser 302 is arranged in the heat storage tank 303.

[0041] The liquid outlet of the waste heat recovery heat exchanger 204 is connected to the magnetic levitation compressor 301, the magnetic levitation compressor 301 is connected to the liquid inlet of the condenser 302, and the liquid outlet of the condenser 302 is connected to the liquid inlet of the waste heat recovery heat exchanger 204, forming a waste heat recovery cycle.

[0042] When the data center of this embodiment is in operation, the cold air produced by the AHU refrigeration unit 1 is transported to the air supply area 201 through the air supply duct 101. It is then delivered to the cabinet area 202 through the air supply port 205, cooling the cabinets 4 in the cabinet area 202. After the cold air exchanges heat with the cabinets 4 in the cabinet area 202 and becomes hot air, it travels along the heat channel through the ceiling 205 and enters the hot return air interlayer 203. The hot air in the hot return air interlayer 203 passes through the return air port 206 on the partition wall between the hot return air interlayer 203 and the waste heat recovery area 204, and enters the waste heat recovery area 204. The waste heat recovery heat exchanger 207 utilizes a microchannel heat exchanger, and the fan 208 guides the hot air toward the waste heat recovery heat exchanger 207 to form a wind wall, where the hot air is cooled by the waste heat recovery heat exchanger 207. A plurality of waste heat recovery heat exchangers 207 may be provided in the waste heat recovery area 204 . The cooled air may form mixed air and enter the return air duct 102 of the AHU refrigeration unit 1 from the air outlet on the other side wall of the waste heat recovery area 204 .

[0043] The working medium heated by hot air in the waste heat recovery heat exchanger 207 enters the condenser 302 in the heat storage tank 303 under the action of the magnetic levitation compressor 301 to heat the water in the heat storage tank 303. The heated hot water can provide hot water or heating for surrounding buildings.

[0044] The present application also provides another waste heat recovery data center based on the AHU refrigeration architecture, such as Figure 2 shown. Figure 2 The overall structure of the data center shown is similar to Figure 1 The data centers shown are similar, including: AHU cooling unit 1, data room 2 and waste heat recovery system 3.

[0045] Data room 2 is divided into two floors by a suspended ceiling 205. The upper floor includes a waste heat recovery area 204 and a hot return air mezzanine 203, while the lower floor includes a supply air area 201 and a cabinet area 202. The waste heat recovery area 204 is located above the supply air area 201, and the hot return air mezzanine 203 is located above the cabinet area 202.

[0046] The air supply pipe 101 of the AHU refrigeration unit 1 is connected to the air supply area 201 , and the air supply area 201 is connected to the cabinet area 202 through the air supply port 205 on the other side.

[0047] A heat channel is provided in the suspended ceiling 205 between the cabinet area 202 and the hot return air mezzanine 203. The cabinet area 202 is connected to the hot return air mezzanine 203 through the suspended ceiling 205. Cabinets 4 are installed in the cabinet area 202, closely arranged in a row. The exhaust air between the two rows of cabinets 4 faces each other, and a heat channel is provided between the two rows of cabinets 4.

[0048] The hot return air interlayer 203 is connected to the waste heat recovery area 204 through the return air port 206. A waste heat recovery heat exchanger 207 is installed in the waste heat recovery area 204.

[0049] The return air duct 102 of the AHU refrigeration unit 1 is connected to the waste heat recovery area 204, forming a complete cooling air circulation for the machine room.

[0050] and Figure 1 The difference from the data center is that the waste heat recovery system 3 in this embodiment includes a heat source side heat pump unit 301 ′, a heat source side circulation pump 302 ′, a heat storage tank 303 ′ and a load side circulation pump 304 ′.

[0051] When the waste heat recovery heat exchanger 207 is connected to the waste heat recovery system 3 through a pipeline, the liquid outlet of the waste heat recovery heat exchanger 207 is connected to the liquid inlet 302' of the heat source side circulation pump, the liquid outlet of the heat source side circulation pump 302' is connected to the liquid inlet of the evaporator of the heat source side heat pump unit 301', and the liquid outlet of the evaporator of the heat source side heat pump unit 301' is connected to the liquid inlet of the waste heat recovery heat exchanger 207, forming a waste heat recovery cycle.

[0052] The liquid outlet of the condenser of the heat source side heat pump unit 301' is connected to the liquid inlet of the heat storage tank 303', the liquid outlet of the heat storage tank 303' is connected to the liquid inlet of the load side circulation pump 304', and the liquid outlet of the load side circulation pump 304' is connected to the liquid inlet of the condenser of the heat source side heat pump unit 301'.

[0053] When the data center of this embodiment is in operation, the cold air produced by the AHU refrigeration unit 1 is transported to the air supply area 201 via the air supply duct 101. It is then delivered to the cabinet area 202 through the air supply vents 205, cooling the cabinets 4 in the cabinet area 202. After the cold air exchanges heat with the cabinets 4 in the cabinet area 202 and becomes hot air, it travels along the heat channel through the ceiling 205 and enters the hot return air interlayer 203. The hot air in the hot return air interlayer 203 passes through the return air vents 206 on the partition wall between the hot return air interlayer 203 and the waste heat recovery area 204, and enters the waste heat recovery area 204. The waste heat recovery heat exchanger 207, which utilizes a finned tube heat exchanger, cools the hot air through the waste heat recovery heat exchanger 207. A plurality of waste heat recovery heat exchangers 207 may be provided in the waste heat recovery area 204 . The cooled air may form mixed air and enter the return air duct 102 of the AHU refrigeration unit 1 from the air outlet on the other side wall of the waste heat recovery area 204 .

[0054] The high-temperature working medium heated by the hot air in the waste heat recovery heat exchanger 207 enters the evaporator of the heat pump unit 301' on the heat source side under the action of the liquid inlet end 302' of the heat source side circulation pump. After the high-temperature working medium in the evaporator of the heat pump unit 301' on the heat source side exchanges heat with the condensed working medium in the condenser of the heat pump unit 301' on the heat source side, the high-temperature working medium is cooled to a low-temperature working medium in the evaporator of the heat pump unit 301' on the heat source side and then flows back to the waste heat recovery heat exchanger 207. After the condensed working medium is heated, it enters the heat storage tank 303' to provide heat for the heat storage tank 303'. The condensed working medium in the heat storage tank 303' that has been cooled is returned to the condenser of the heat pump unit 301' on the heat source side through the action of the load side circulation pump 304'.

[0055] In the present application, the waste heat recovery heat exchanger 207 may adopt other heat exchangers besides the microchannel heat exchanger or fin-tube heat exchanger in the above embodiments, which are not listed one by one in this application.

[0056] In the present application, the working fluid flowing inside the pipelines of the waste heat recovery heat exchanger 207 and the waste heat recovery system 3 can be Freon, water or other commonly used working fluids.

[0057] In this application, the data room 2 is a dispersed data room.

[0058] The waste heat recovery data center based on the AHU refrigeration architecture of the present application has the following advantages: the use of a centralized heat pump unit can reduce the number of compressors inside the AHU refrigeration unit, reduce the size and cost of the AHU refrigeration unit, and even achieve physical isolation of evaporative cooling and supplementary cooling; the use of waste heat recovery can significantly reduce the water consumption of the data center; it can also serve as a backup cold source for computer room cooling, and can be used as an emergency cold source when the AHU refrigeration unit fails to ensure stable cooling conditions in the computer room; the wind resistance increases less, the impact on the fan of the original AHU refrigeration unit is small, and the power consumption of the fan increases less; waste heat recovery is easy to repair, and the repair does not affect the operation of the AHU refrigeration unit, realizing online maintenance; especially when the refrigeration function is physically isolated, the maintenance cycle and frequency of the AHU refrigeration unit are greatly reduced.

[0059] The waste heat recovery data center based on the AHU refrigeration architecture of this application utilizes the waste heat in the computer room to provide free heat sources for heating or hot water for rooms in surrounding buildings, which has certain economic benefits. Taking a 300kw AHU as an example, the waste heat recovery part can save 430 tons of standard coal each year. The waste heat recovery equipment itself increases the power consumption by 108 tons of standard coal, saving 322 tons of standard coal annually and saving 320,000 yuan in costs.

[0060] In an embodiment of the present application, a waste heat recovery data center based on an AHU refrigeration architecture includes an AHU refrigeration unit, a data room and a waste heat recovery system: the data room is divided into two upper and lower layers by a suspended ceiling, the upper layer includes a waste heat recovery area and a hot return air mezzanine, and the lower layer includes a supply air area and a cabinet area, the waste heat recovery area is located above the supply air area, the hot return air mezzanine is located above the cabinet area, the supply air area is connected to the cabinet area through an air supply outlet, the cabinet area is connected to the hot return air mezzanine through a suspended ceiling, and the hot return air mezzanine is connected to the waste heat recovery area through a return air outlet; the supply air duct of the AHU refrigeration unit is connected to the supply air area, and the return air duct of the AHU refrigeration unit is connected to the waste heat recovery area; a waste heat recovery heat exchanger is installed in the waste heat recovery area, and the waste heat recovery heat exchanger is connected to the waste heat recovery system through a pipeline. This application combines the AHU refrigeration unit with the computer room building. By setting up an independent waste heat recovery area, the waste heat recovery is physically isolated from the AHU refrigeration unit, solving the problem of large-scale waste heat recovery while improving the system's refrigeration redundancy safety and robustness.

[0061] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

Claims

1. A waste heat recovery data center based on AHU refrigeration architecture, characterized by: Including AHU refrigeration unit, data center and waste heat recovery system: The data room is divided into two floors by a suspended ceiling, the upper floor includes a waste heat recovery area and a hot return air mezzanine, and the lower floor includes an air supply area and a cabinet area, the waste heat recovery area is located above the air supply area, the hot return air mezzanine is located above the cabinet area, the air supply area is connected to the cabinet area through an air supply vent, the cabinet area is connected to the hot return air mezzanine through the suspended ceiling, and the hot return air mezzanine is connected to the waste heat recovery area through a return air vent; The air supply pipe of the AHU refrigeration unit is connected to the air supply area, and the return air pipe of the AHU refrigeration unit is connected to the waste heat recovery area; A waste heat recovery heat exchanger is installed in the waste heat recovery area, and the waste heat recovery heat exchanger is connected to the waste heat recovery system through a pipeline.

2. The data center according to claim 1, wherein: The waste heat recovery system includes a magnetic levitation compressor, a condenser and a heat storage tank, wherein the condenser is arranged in the heat storage tank; The liquid outlet of the waste heat recovery heat exchanger is connected to the magnetic levitation compressor, the magnetic levitation compressor is connected to the liquid inlet of the condenser, and the liquid outlet of the condenser is connected to the liquid inlet of the waste heat recovery heat exchanger.

3. The data center according to claim 1, wherein: The waste heat recovery system includes a heat pump unit on the heat source side, a circulating pump on the heat source side, a heat storage tank and a circulating pump on the load side; The liquid outlet of the waste heat recovery heat exchanger is connected to the liquid inlet of the heat source side circulation pump, the liquid outlet of the heat source side circulation pump is connected to the liquid inlet of the evaporator of the heat source side heat pump unit, and the liquid outlet of the evaporator of the heat source side heat pump unit is connected to the liquid inlet of the waste heat recovery heat exchanger; The liquid outlet of the condenser of the heat source side heat pump unit is connected to the liquid inlet of the heat storage tank on the heat source side, the liquid outlet of the heat storage tank on the heat source side is connected to the liquid inlet of the load side circulation pump, and the liquid outlet of the load side circulation pump is connected to the liquid inlet of the condenser of the heat source side heat pump unit.

4. The data center according to claim 1, wherein: A fan is also installed in the waste heat recovery area, and the waste heat recovery heat exchanger is installed between the fan and the return air port.

5. The data center according to claim 1, wherein: The waste heat recovery heat exchanger includes a microchannel heat exchanger or a fin-tube heat exchanger.

6. The data center according to claim 1, wherein: The working medium circulating in the pipeline includes Freon or water.

7. The data center according to claim 1, wherein: A heat channel is provided in the suspended ceiling between the cabinet area and the hot return air interlayer.

8. The data center according to claim 7, wherein: Cabinets are installed in the cabinet area. The cabinets are closely arranged in a row, and the exhaust air between the two rows of cabinets is opposite. The hot channel is arranged between the two rows of cabinets.

9. The data center according to claim 1, wherein: At least one waste heat recovery heat exchanger is installed in the waste heat recovery area.

10. The data center according to claim 1, wherein: The data room is a dispersed room.