Multi-pressure-grade waste heat recovery system for data machine room

Abstract

The utility model relates to the technical field of heat recovery, in particular to a multi-pressure-grade waste heat recovery system for a data machine room, which comprises a data center cooling system and a multi-pressure-grade heat pump unit connected with the data center cooling system. The multi-pressure-grade heat pump unit comprises a first pressure-grade heat pump unit, a second pressure-grade heat pump unit and a third pressure-grade heat pump unit; the data center cooling system achieves waste heat recovery and multi-parameter heat supply through the first pressure grade heat pump unit, the second pressure grade heat pump unit and the third pressure grade heat pump unit.

Description

Technical Field

[0001] The utility model relates to the technical field of heat recovery, and in particular to a multi-pressure level waste heat recovery system for a data center. Background Art

[0002] With the continuous development of information technology, various large-scale data centers have emerged. The large service equipment in the data center will generate a lot of heat when working. In order to maintain the normal operation of the data center, the data center cooling system is usually used to cool the data center room. The heat carried by the cooling medium of the data center cooling system is directly discharged into the atmosphere, causing heat pollution and energy waste.

[0003] The existing waste heat recovery system of the data room recovers the waste heat of the data room and applies it to the heating system. However, the existing waste heat recovery heating system has a single heating form and cannot meet the user's needs for different thermal parameters. Based on the above, there is an urgent need for a data room multi-pressure level waste heat recovery system to meet the user's needs for different thermal parameters. Utility Model Content

[0004] The utility model aims to provide a multi-pressure level waste heat recovery system for a data center. The specific technical solution is as follows:

[0005] A multi-pressure level waste heat recovery system for a data room includes a data center cooling system and a multi-pressure level heat pump unit, wherein the multi-pressure level heat pump unit is connected to the data center cooling system; the multi-pressure level heat pump unit includes a first pressure level heat pump unit, a second pressure level heat pump unit and a third pressure level heat pump unit, and the data center cooling system realizes waste heat recovery and multi-parameter heating through the first pressure level heat pump unit, the second pressure level heat pump unit and the third pressure level heat pump unit.

[0006] Furthermore, the data center cooling system includes a cold water circulation pipeline, on which a cold water circulation pump is provided, and the cold water circulation pipeline is connected to a multi-pressure level heat pump unit.

[0007] Furthermore, the multi-pressure level heat pump unit includes an evaporator, a multi-pressure level compressor and a condenser, the cold water circulation pipeline is connected to the evaporator, one end of the multi-pressure level compressor is connected to the evaporator, and the other end is connected to the condenser.

[0008] Furthermore, the multi-pressure level compressor includes a first pressure level outlet, a second pressure level outlet and a third pressure level outlet; the condenser includes a first condenser, a second condenser and a third condenser.

[0009] Furthermore, the first pressure level outlet is connected to the inlet end of the first condenser to form a first pressure level heat pump unit; the second pressure level outlet is connected to the inlet end of the second condenser to form a second pressure level heat pump unit; the third pressure level outlet is connected to the inlet end of the third condenser to form a third pressure level heat pump unit.

[0010] Furthermore, the first pressure level outlet, the second pressure level outlet and the third pressure level outlet are all provided with pressure control valves; the first pressure level outlet, the second pressure level outlet and the third pressure level outlet are controlled by the pressure control valves to output working fluids of different pressures.

[0011] Furthermore, the outlet ends of the first condenser, the second condenser and the third condenser are all connected to the gas collector; and a throttle valve is provided between the first condenser, the second condenser and the third condenser and the gas collector.

[0012] Furthermore, the outlet end of the gas collector is connected to the evaporator.

[0013] Furthermore, the condensation temperatures of the first condenser, the second condenser and the third condenser are different.

[0014] Furthermore, the heat pump unit of the first pressure level is connected to a first user end, the heat pump unit of the second pressure level is connected to a second user end, and the heat pump unit of the third pressure level is connected to a third user end.

[0015] The application of the technical solution of the utility model has the following beneficial effects:

[0016] (1) The utility model provides a data center multi-pressure level waste heat recovery system, including a data center cooling system and a multi-pressure level heat pump unit, wherein the multi-pressure level heat pump unit is connected to the data center cooling system; the multi-pressure level heat pump unit includes a first pressure level heat pump unit, a second pressure level heat pump unit and a third pressure level heat pump unit, and the data center cooling system realizes waste heat recovery and multi-parameter heating through the first pressure level heat pump unit, the second pressure level heat pump unit and the third pressure level heat pump unit, thereby meeting the user's requirements for different thermal parameters.

[0017] (2) In the present invention, the data center cooling system includes a cold water circulation pipeline, a cold water circulation pump is provided on the cold water circulation pipeline, and the cold water circulation pipeline is connected to the evaporator to realize the refrigeration cycle of the data center cooling system.

[0018] (3) In the present invention, the multi-pressure level compressor includes a first pressure level outlet, a second pressure level outlet and a third pressure level outlet; the condenser includes a first condenser, a second condenser and a third condenser. The first pressure level outlet is connected to the first condenser inlet to form a first pressure level heat pump unit; the second pressure level outlet is connected to the second condenser inlet to form a second pressure level heat pump unit; the third pressure level outlet is connected to the third condenser inlet to form a third pressure level heat pump unit. The present invention provides three parameter heating systems to meet the different needs of users.

[0019] (4) In the utility model, a throttle valve is provided between the first condenser, the second condenser and the third condenser and the gas collector, and the throttle valve is used to control the flow rate of the working fluid. When the load at the outlet of the condenser changes, the flow rate of the working fluid is controlled by changing the opening of the throttle valve to adapt to the load demand at the outlet of the condenser.

[0020] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0022] Figure 1 It is the overall structural diagram of the multi-pressure level waste heat recovery system in the data center;

[0023] Figure 2 It is a schematic diagram of the structure of a multi-pressure level compressor;

[0024] Among them, 1. Data center cooling system, 1.1. Cold water circulation pipeline, 1.2. Cold water circulation pump, 2. Multi-pressure level heat pump unit, 2.1. Evaporator, 2.2. Multi-pressure level compressor, 2.2.1. First pressure level outlet, 2.2.2. Second pressure level outlet, 2.2.3. Third pressure level outlet, 2.3. Condenser, 2.3.1. First condenser, 2.3.2. Second condenser, 2.3.3. Third condenser, 3. Pressure control valve, 4. Gas collector, 5. Throttle valve, 6. First user end, 7. Second user end, 8. Third user end. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0026] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0027] Example:

[0028] See also Figure 1 , This embodiment provides a data center multi-pressure level waste heat recovery system, including a data center cooling system 1 and a multi-pressure level heat pump unit 2, wherein the multi-pressure level heat pump unit 2 is connected to the data center cooling system 1;

[0029] The multi-pressure level heat pump unit 2 includes a first pressure level heat pump unit, a second pressure level heat pump unit and a third pressure level heat pump unit. The data center cooling system 1 realizes waste heat recovery and multi-parameter heating through the first pressure level heat pump unit, the second pressure level heat pump unit and the third pressure level heat pump unit, thereby meeting the user's requirements for different thermal parameters.

[0030] In this embodiment, the data center cooling system 1 includes a cold water circulation pipeline 1.1, the cold water circulation pump 1.2 is arranged on the cold water circulation pipeline 1.1, and the cold water circulation pipeline 1.1 is connected to the multi-pressure level heat pump unit 2.

[0031] In this embodiment, the multi-pressure level heat pump unit 2 includes an evaporator 2.1, a multi-pressure level compressor 2.2 and a condenser 2.3, the cold water circulation pipeline 1.1 is connected to the evaporator 2.1, one end of the multi-pressure level compressor 2.2 is connected to the evaporator 2.1, and the other end is connected to the condenser 2.3.

[0032] See also Figure 1 and Figure 2 In this embodiment, the multi-pressure level compressor 2.2 includes a first pressure level outlet 2.2.1, a second pressure level outlet 2.2.2 and a third pressure level outlet 2.2.3; the condenser 2.3 includes a first condenser 2.3.1, a second condenser 2.3.2 and a third condenser 2.3.3.

[0033] The first pressure level outlet 2.2.1 is connected to the inlet end of the first condenser 2.3.1 to form a first pressure level heat pump unit; the second pressure level outlet 2.2.2 is connected to the inlet end of the second condenser 2.3.2 to form a second pressure level heat pump unit; the third pressure level outlet 2.2.3 is connected to the inlet end of the third condenser 2.3.3 to form a third pressure level heat pump unit.

[0034] The first pressure level outlet 2.2.1, the second pressure level outlet 2.2.2 and the third pressure level outlet 2.2.3 are all provided with a pressure control valve 3, and the first pressure level outlet 2.2.1, the second pressure level outlet 2.2.2 and the third pressure level outlet 2.2.3 are controlled by the pressure control valve 3 to output three working fluids of different pressures (in this embodiment, the working fluid is preferably gas), and then output heat of different parameters through the first condenser 2.3.1, the second condenser 2.3.2 and the third condenser 2.3.3 to meet the user's requirements for different thermal parameters.

[0035] See also Figure 2 In this embodiment, the outlets of the first condenser 2.3.1, the second condenser 2.3.2 and the third condenser 2.3.3 are all connected to the gas collector 4; a throttle valve 5 is provided between the first condenser 2.3.1, the second condenser 2.3.2 and the third condenser 2.3.3 and the gas collector 4, and the outlet of the gas collector 4 is connected to the evaporator 2.1. The throttle valve 5 is used to control the gas flow rate. When the load at the outlet of the condenser 2.3 changes, the gas flow rate is controlled by changing the opening of the throttle valve 5 to adapt to the load demand at the outlet of the condenser 2.3.

[0036] In this embodiment, in order to reduce the temperature difference between cold and hot sources and lower the energy consumption of the multi-pressure level compressor 2.2, the first condenser 2.3.1, the second condenser 2.3.2 and the third condenser 2.3.3 are set to work at different condensing temperatures.

[0037] In this embodiment, the first condenser 2.3.1 is connected to the first user terminal 6, the second condenser 2.3.2 is connected to the second user terminal 7, and the third condenser 2.3.3 is connected to the third user terminal 8.

[0038] In this embodiment, taking R134a refrigerant as an example, the pressure value of the pressure control valve 3 at the first pressure level outlet 2.2.1 is set to 1.16±0.02MPa, and the condensing temperature of the first condenser 2.3.1 is set to 45°C; the pressure value of the pressure control valve 3 at the second pressure level outlet 2.2.2 is set to 1.32±0.02MPa, and the condensing temperature of the second condenser 2.3.2 is set to 50°C; the pressure value of the pressure control valve 3 at the third pressure level outlet 2.2.3 is set to 1.49±0.02MPa, and the condensing temperature of the third condenser 2.3.3 is set to 55°C; the multi-pressure level compressor 2.2 works to provide three gases with different pressures, and realizes three parameters of heat output through the first condenser 2.3.1, the second condenser 2.3.2 and the third condenser 2.3.3, thereby meeting the heat requirements of different users or different heat parameter requirements of the same user.

[0039] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A data center multi-pressure level waste heat recovery system, characterized in that: It comprises a data center cooling system (1) and a multi-pressure level heat pump unit (2), wherein the multi-pressure level heat pump unit (2) is connected to the data center cooling system (1); The multi-pressure level heat pump unit (2) comprises a first pressure level heat pump unit, a second pressure level heat pump unit and a third pressure level heat pump unit, and the data center cooling system (1) realizes waste heat recovery and multi-parameter heating through the first pressure level heat pump unit, the second pressure level heat pump unit and the third pressure level heat pump unit.

2. The data center multi-pressure level waste heat recovery system according to claim 1 is characterized in that: The data center cooling system (1) comprises a cold water circulation pipeline (1.1), a cold water circulation pump (1.2) is provided on the cold water circulation pipeline (1.1), and the cold water circulation pipeline (1.1) is connected to a multi-pressure level heat pump unit (2).

3. The data center multi-pressure level waste heat recovery system according to claim 2 is characterized in that: The multi-pressure level heat pump unit (2) comprises an evaporator (2.1), a multi-pressure level compressor (2.2) and a condenser (2.3); the cold water circulation pipeline (1.1) is connected to the evaporator (2.1); one end of the multi-pressure level compressor (2.2) is connected to the evaporator (2.1) and the other end is connected to the condenser (2.3).

4. The data center multi-pressure level waste heat recovery system according to claim 3 is characterized in that: The multi-pressure level compressor (2.2) comprises a first pressure level outlet (2.2.1), a second pressure level outlet (2.2.2) and a third pressure level outlet (2.2.3); the condenser (2.3) comprises a first condenser (2.3.1), a second condenser (2.3.2) and a third condenser (2.3.3).

5. The data center multi-pressure level waste heat recovery system according to claim 4 is characterized in that: The first pressure level outlet (2.2.1) is connected to the inlet end of the first condenser (2.3.1) to form a first pressure level heat pump unit; the second pressure level outlet (2.2.2) is connected to the inlet end of the second condenser (2.3.2) to form a second pressure level heat pump unit; the third pressure level outlet (2.2.3) is connected to the inlet end of the third condenser (2.3.3) to form a third pressure level heat pump unit.

6. The data center multi-pressure level waste heat recovery system according to claim 5 is characterized in that: The first pressure level outlet (2.2.1), the second pressure level outlet (2.2.2) and the third pressure level outlet (2.2.3) are all provided with a pressure control valve (3); the first pressure level outlet (2.2.1), the second pressure level outlet (2.2.2) and the third pressure level outlet (2.2.3) control the output of working fluids of different pressures through the pressure control valve (3).

7. The data center multi-pressure level waste heat recovery system according to claim 4 is characterized in that: The outlet ends of the first condenser (2.3.1), the second condenser (2.3.2) and the third condenser (2.3.3) are all connected to the gas collector (4); and a throttle valve (5) is provided between the first condenser (2.3.1), the second condenser (2.3.2) and the third condenser (2.3.3) and the gas collector (4).

8. The data center multi-pressure level waste heat recovery system according to claim 7 is characterized in that: The outlet end of the gas collector (4) is connected to the evaporator (2.1).

9. The data center multi-pressure level waste heat recovery system according to claim 4 is characterized in that: The condensation temperatures of the first condenser (2.3.1), the second condenser (2.3.2) and the third condenser (2.3.3) are different.

10. The data center multi-pressure level waste heat recovery system according to any one of claims 1 to 9, characterized in that: The first pressure level heat pump unit is connected to a first user terminal (6), the second pressure level heat pump unit is connected to a second user terminal (7), and the third pressure level heat pump unit is connected to a third user terminal (8).

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