Double-cold-source energy storage liquid cooling system

Abstract

The utility model relates to the technical field of energy storage liquid cooling, in particular to a double-cold-source energy storage liquid cooling system, which comprises a compressor liquid cooling system, a heat pipe liquid cooling system, a plate heat exchanger, a temperature monitoring module and a control valve group, and is characterized in that the plate heat exchanger is provided with a waterway pipeline, a first liquid cooling pipeline and a second liquid cooling pipeline; the waterway pipeline is used for circulating cooling water, the first liquid cooling pipeline is communicated with the compressor liquid cooling system, the second liquid cooling pipeline is communicated with the heat pipe liquid cooling system, and the temperature monitoring modules are respectively arranged on pipeline loops of the waterway loop, the compressor liquid cooling system and the heat pipe liquid cooling system. The temperature monitoring module is used for acquiring the internal environment temperature and the cooling water temperature of the energy storage unit in real time, the control valve group is arranged on a water path loop, a compressor liquid cooling system and a pipeline loop of a heat pipe liquid cooling system, and the control valve group is electrically connected with the temperature monitoring module so as to control the closing state of a valve body according to a temperature signal. The energy storage equipment unit has the effect of improving the energy efficiency of the energy storage equipment unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage liquid cooling, and in particular to a double-cold-source energy storage liquid cooling system. BACKGROUND

[0002] The energy storage liquid cooling system is a cooling technology applied to energy storage equipment, which reduces the internal temperature of the energy storage equipment through liquid coolant circulation. Specifically, the liquid coolant flows through the internal part of the energy storage equipment under the guidance of the liquid cooling plate, liquid cooling pump, liquid cooling pipeline and other components, absorbs and carries away heat, and then releases heat to the external environment through the condenser and evaporator and other components, thereby achieving the cooling of the energy storage equipment.

[0003] However, the existing energy storage liquid cooling system generally has low energy efficiency, especially the comprehensive energy efficiency of the unit. The operating condition point of the unit is not always at the rated point, and the low ambient temperature operating condition needs to be considered. Under low ambient temperature, if the compressor refrigeration operation is adopted, the unit energy consumption is high, and at the same time, the unit reliability is reduced due to the poor oil return caused by the long-term low-speed operation of the compressor. Therefore, there is room for improvement. Practical new type content

[0004] In order to improve the energy efficiency of the energy storage equipment unit, the present application provides a double-cold-source energy storage liquid cooling system, which adopts the following technical scheme:

[0005] A double-cold-source energy storage liquid cooling system, comprising a compressor liquid cooling system, a heat pipe liquid cooling system, a plate exchanger, a temperature monitoring module and a control valve group, the plate exchanger is provided with a water circuit pipeline, a first liquid cooling pipeline and a second liquid cooling pipeline, the water circuit pipeline is used for circulating cooling water, the first liquid cooling pipeline is communicated with the compressor liquid cooling system, and the second liquid cooling pipeline is communicated with the heat pipe liquid cooling system, the temperature monitoring module is arranged on the pipeline circuit of the water circuit loop, the compressor liquid cooling system and the heat pipe liquid cooling system respectively, the temperature monitoring module is used for acquiring the internal environment temperature of the energy storage unit and the cooling water temperature in real time, and the control valve group is arranged on the pipeline circuit of the water circuit loop, the compressor liquid cooling system and the heat pipe liquid cooling system respectively, and the control valve group is electrically connected with the temperature monitoring module, so as to control the closing state of the valve body according to the temperature signal.

[0006] By adopting the above technical solution, the ambient temperature in the energy storage unit and the cooling water temperature in the water pipeline are monitored in real time by the temperature monitoring module to output a temperature signal to the control valve group. The control valve group controls the conduction of the pipeline loops of the compressor liquid cooling system and the heat pipe liquid cooling system according to the temperature conditions. Specifically, when the temperature monitoring module detects that the ambient temperature in the energy storage unit is lower than the return liquid temperature in the water pipeline, the control valve group makes the cooling loop of the heat pipe liquid cooling system conductive. The water vapor generated by the high temperature in the water pipeline of the plate exchanger releases heat and cools along the pipeline of the heat pipe liquid cooling system, is converted into liquid, and flows back to the plate exchanger, thereby cooling the refrigerant in the water loop and realizing the liquid cooling function. When the temperature monitoring module continuously detects that the ambient temperature in the energy storage unit is always lower than the return liquid temperature in the water pipeline, it means that the heat pipe liquid cooling system alone cannot meet the cooling requirements. The control valve group makes the cooling loop of the compressor liquid cooling system conductive, and the compressor starts. The compressor is used to compress and cool the water vapor generated by the high temperature of the refrigerant, convert it into liquid, and flow back into the plate exchanger to cool the refrigerant in the water circuit of the plate exchanger. The refrigerant can be simultaneously regulated by the heat pipe liquid cooling system and the compressor liquid cooling system. When the ambient temperature in the energy storage unit is greater than or equal to the return liquid temperature, the control valve group disconnects the circuit of the heat pipe liquid cooling system, and only the compressor liquid cooling system is used for cooling regulation. During the liquid cooling process, the entire energy storage unit can control the operation of the heat pipe liquid cooling system or the compressor liquid cooling system according to the ambient temperature and return liquid temperature in the energy storage unit at low ambient temperatures, so that the energy storage unit does not always use the compressor liquid cooling system for cooling, thereby effectively improving the energy efficiency of the energy storage unit. The liquid cooling circuits of the heat pipe liquid cooling system and the compressor liquid cooling system are completely independent and do not interfere with each other. They can operate simultaneously. The opening point of the heat pipe liquid cooling system is higher, which makes the overall energy efficiency of the energy storage unit higher.

[0007] Optionally, the compressor liquid cooling system includes a compressor body, a first condenser and a drying filter, and the compressor body, the first condenser and the drying filter are connected in sequence through pipes to form a closed loop, the control valve group includes an electronic expansion valve, and the electronic expansion valve is arranged on the loop of the compressor liquid cooling system, the temperature monitoring module includes a first temperature sensor and a second temperature sensor, and the first temperature sensor and the second temperature sensor are arranged on the loop of the compressor liquid cooling system, the first temperature sensor is used to detect the temperature of the refrigerant input into the plate exchanger, and the second temperature sensor is used to detect the intake temperature input into the compressor, and a pressure detection module is also provided on the loop of the compressor liquid cooling system, and the pressure detection module is respectively arranged at the air inlet and air outlet of the compressor body, for real-time monitoring of the intake pressure and exhaust pressure of the compressor body.

[0008] By adopting the technical scheme, the compressor liquid cooling system forms a closed loop, the electronic expansion valve is used to control the refrigerant flow, the first temperature sensor is used to detect the temperature of the refrigerant input into the plate heat exchanger, the second temperature sensor is used to detect the suction temperature of the refrigerant input into the compressor, and the pressure detection module is used to monitor the suction pressure and the discharge pressure of the compressor in real time, so that the compressor operation state is comprehensively monitored and controlled, and the stability and efficiency of the system operation are ensured.

[0009] Optionally, the heat pipe liquid cooling system comprises a second condenser, the second condenser is communicated with the plate heat exchanger through a pipeline to form a closed loop, and the control valve group comprises a first ball valve and a second ball valve, the first ball valve and the second ball valve are arranged on the loop of the heat pipe liquid cooling system respectively.

[0010] By adopting the technical scheme, when the temperature monitoring module detects that the ambient temperature in the energy storage unit is less than the return liquid temperature in the water pipeline, the first ball valve and the second ball valve make the loop of the heat pipe liquid cooling system conductive, the water vapor generated by the high temperature of the refrigerant in the water pipeline of the plate heat exchanger is cooled and converted into liquid along the pipeline of the heat pipe liquid cooling system, and the liquid is returned to the plate heat exchanger to cool the refrigerant in the water pipeline, so that the liquid cooling function is realized.

[0011] Optionally, the second condenser is arranged above the plate heat exchanger.

[0012] By adopting the technical scheme, the second condenser is arranged above the plate heat exchanger, so that the liquid coolant formed by the second condenser can automatically flow back to the plate heat exchanger by gravity, and the liquid cooling function is realized.

[0013] Optionally, the water pipeline on the plate heat exchanger is provided with a return liquid port and a liquid supply port, the return liquid port is communicated with a return liquid pipe, a water pump is arranged on the return liquid pipe, the control valve group comprises a liquid adding valve, the liquid adding valve is arranged on the return liquid pipe, the temperature detection module comprises a return liquid temperature sensor, the return liquid temperature sensor is arranged at the pipe opening of the return liquid pipe, an automatic exhaust valve, a return liquid pressure gauge and an expansion tank are further arranged at the pipe opening of the return liquid pipe, the liquid supply port of the plate heat exchanger is communicated with a liquid supply pipe, a PCT electric heater is arranged on the liquid supply pipe, a liquid supply pressure gauge is arranged at the liquid supply port of the liquid supply pipe, and the temperature detection module further comprises a liquid supply temperature sensor, the liquid supply temperature sensor is arranged at the pipe opening of the liquid supply pipe.

[0014] By adopting the above technical solution, the water pipes of the plate exchanger form a water circuit for the flow of refrigerant, which is used to liquid-cool the energy storage unit. The refrigerant after passing through the energy storage unit flows into the return pipe, and the return liquid temperature is monitored in real time by the return liquid temperature sensor. It is used to compare with the ambient temperature in the energy storage unit to control the start-up of the heat pipe liquid cooling system or the compressor liquid cooling system, ensuring the refrigerant flow control during the return liquid process. The provision of the automatic exhaust valve, return liquid pressure gauge and expansion tank further improves the safety and stability of the liquid cooling system. The refrigerant after cooling through the heat pipe liquid cooling system or the press liquid cooling system flows out of the liquid supply pipe into the energy storage unit. The PCT electric heater on the liquid supply pipe can adjust the liquid temperature as needed. The liquid supply temperature sensor and the liquid supply pressure gauge ensure that the temperature and pressure of the supply liquid are within a reasonable range, thereby improving the operating efficiency and reliability of the entire system.

[0015] Optionally, the temperature monitoring module further includes an in-machine ambient temperature sensor, and the in-machine ambient temperature sensor is electrically connected to the control valve group.

[0016] By adopting the above technical solution, the ambient temperature inside the energy storage unit is obtained in real time through the internal ambient temperature sensor, which is used to compare with the return liquid temperature. Then, based on the comparison result, the control valve group controls the start-up of the heat pipe liquid cooling system and / or the press liquid cooling system to cool the refrigerant in the plate exchanger.

[0017] Optionally, a pressure detection module is further provided on the circuit of the compressor liquid cooling system. The pressure detection module is arranged at the air inlet and air outlet of the compressor body and is used to monitor the suction pressure and exhaust pressure of the compressor body in real time.

[0018] By adopting the above technical solution, a pressure detection module is provided on the circuit of the compressor liquid cooling system. The pressure detection module is arranged at the air inlet and air outlet of the compressor body, and can monitor the suction pressure and exhaust pressure of the compressor body in real time, thereby improving the safety and reliability of the system.

[0019] Optionally, a liquid return pressure gauge is further provided at the pipe opening of the liquid return pipe.

[0020] By adopting the above technical solution, the additional return liquid pressure gauge can monitor the pressure changes in the return liquid pipe in real time, ensure that the system operates within a safe pressure range, and improve the stability and reliability of the system.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. The temperature monitoring module monitors the ambient temperature in the energy storage unit and the cooling water temperature in the water pipeline in real time to output a temperature signal to the control valve group. The control valve group controls the conduction of the pipeline loops of the compressor liquid cooling system and the heat pipe liquid cooling system according to the temperature conditions. Specifically, when the temperature monitoring module detects that the ambient temperature in the energy storage unit is lower than the return liquid temperature in the water pipeline, the control valve group makes the cooling loop of the heat pipe liquid cooling system conductive. The refrigerant in the water pipeline of the plate exchanger releases heat and cools along the pipeline of the heat pipe liquid cooling system due to the water vapor generated by the high temperature, and is converted into liquid and flows back to the plate exchanger to cool the refrigerant in the water loop, thereby realizing the liquid cooling function. When the temperature monitoring module continuously detects that the ambient temperature in the energy storage unit is always lower than the return liquid temperature in the water pipeline, it indicates that the heat pipe liquid cooling system alone cannot meet the cooling requirements. The control valve group makes the cooling loop of the compressor liquid cooling system conductive, and the compressor is started. The machine compresses and cools the water vapor generated by the high temperature of the refrigerant, converts it into liquid, and flows back into the plate exchanger to cool the refrigerant in the water circuit of the plate exchanger. The refrigerant can be simultaneously regulated by the heat pipe liquid cooling system and the compressor liquid cooling system. When the ambient temperature in the energy storage unit is greater than or equal to the return liquid temperature, the control valve group disconnects the circuit of the heat pipe liquid cooling system, and only the compressor liquid cooling system is used for cooling regulation. During the liquid cooling process, the entire energy storage unit can control the operation of the heat pipe liquid cooling system or the compressor liquid cooling system according to the ambient temperature and return liquid temperature in the energy storage unit at low ambient temperatures, so that the energy storage unit does not always use the compressor liquid cooling system for cooling, thereby effectively improving the energy efficiency of the energy storage unit. The liquid cooling circuits of the heat pipe liquid cooling system and the compressor liquid cooling system are completely independent and do not interfere with each other. They can operate at the same time. The opening point of the heat pipe liquid cooling system is higher, which makes the overall energy efficiency of the energy storage unit higher.

[0023] 2. The compressor liquid cooling system forms a closed loop, using an electronic expansion valve to control the refrigerant flow rate. Combined with the first temperature sensor detecting the temperature of the refrigerant input to the plate exchanger, the second temperature sensor detecting the suction temperature input to the compressor, and the pressure detection module to monitor the suction pressure and discharge pressure of the compressor body in real time, it realizes comprehensive monitoring and control of the compressor operation status, ensuring the stability and efficiency of the system operation;

[0024] 3. When the temperature monitoring module detects that the ambient temperature inside the energy storage unit is lower than the return liquid temperature in the water pipeline, the first ball valve and the second ball valve connect the circuit of the heat pipe liquid cooling system. The refrigerant in the water pipeline of the plate heat exchanger generates water vapor due to the high temperature, which is cooled along the pipeline of the heat pipe liquid cooling system and converted into liquid. The liquid coolant flows back to the plate heat exchanger, cooling the refrigerant in the water circuit and realizing the liquid cooling function. The second condenser is arranged above the plate heat exchanger, so that the liquid coolant formed by the second condenser can automatically flow back to the plate heat exchanger by gravity, facilitating the liquid cooling function.

[0025] 4. The ambient temperature inside the energy storage unit is obtained in real time through the internal ambient temperature sensor, which is used to compare with the return liquid temperature. Then, based on the comparison result, the control valve group controls the start-up of the heat pipe liquid cooling system and / or the press liquid cooling system to cool the refrigerant in the plate exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of a control system for a dual-cold-source energy storage liquid cooling system in one embodiment of the present application.

[0027] Description of the drawings: 1. Compressor body; 2. Plate exchanger; 3. First condenser; 4. Second condenser. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of this application more clear, the following Figure 1 This application is described in further detail.

[0029] In one embodiment, if Figure 1 As shown, the present application discloses a control system for a dual-cold source energy storage liquid cooling system, a dual-cold source energy storage liquid cooling system, comprising a compressor liquid cooling system, a heat pipe liquid cooling system, a plate exchanger 2, a temperature monitoring module and a control valve group. The plate exchanger 2 is provided with a water pipeline, a first liquid cooling pipeline and a second liquid cooling pipeline. The water pipeline is used to circulate cooling water. The water pipeline on the plate exchanger 2 is provided with a return liquid port and a liquid supply port. The return liquid port is connected to a return liquid pipe. A water pump is provided on the return liquid pipe. An automatic exhaust valve, a return liquid pressure gauge and an expansion tank are provided at the pipe mouth of the return liquid pipe. The liquid supply port is connected to a liquid supply pipe. A PCT electric heater is provided on the liquid supply pipe. A liquid supply pressure gauge is provided at the liquid supply port of the liquid supply pipe.

[0030] The first liquid cooling pipe is connected to the compressor liquid cooling system, and the second liquid cooling pipe is connected to the heat pipe liquid cooling system. The compressor liquid cooling system includes a compressor body 1, a first condenser 3 and a drying filter. The compressor body 1, the first condenser 3 and the drying filter are connected in sequence through pipes to form a closed loop. The heat pipe liquid cooling system includes a second condenser 4. The second condenser 4 is connected to the plate exchanger 2 through a pipe to form a closed loop. The second condenser 4 is arranged above the plate exchanger 2, so that the liquid coolant formed by the second condenser 4 can automatically flow back to the plate exchanger 2 by gravity.

[0031] The control valve groups are respectively arranged on the pipeline loops of the water circuit, the compressor liquid cooling system and the heat pipe liquid cooling system. The control valve groups are electrically connected to the temperature monitoring module to control the closing state of the valve body according to the temperature signal. The control valve group includes an electronic expansion valve, a liquid adding valve, a first ball valve and a second ball valve. The electronic expansion valve is arranged on the loop of the compressor liquid cooling system, the liquid adding valve is arranged on the return liquid pipe, and the first ball valve and the second ball valve are respectively arranged on the loop of the heat pipe liquid cooling system.

[0032] The temperature monitoring module is arranged on the pipeline circuit of the water circuit loop, the compressor liquid cooling system and the heat pipe liquid cooling system respectively, and is used for acquiring the internal environment temperature of the energy storage unit and the cooling water temperature in real time. The temperature monitoring module comprises a first temperature sensor, a second temperature sensor, a return liquid temperature sensor, a liquid supply temperature sensor and an internal environment temperature sensor. The first temperature sensor and the second temperature sensor are arranged on the pipeline circuit of the compressor liquid cooling system. The first temperature sensor is used for detecting the temperature of the refrigerant input into the plate heat exchanger 2. The second temperature sensor is used for detecting the suction temperature input into the compressor. The return liquid temperature sensor is arranged at the pipe opening of the return liquid pipe. The liquid supply temperature sensor is arranged at the pipe opening of the liquid supply pipe.

[0033] The implementation principle of the double-cold-source energy storage liquid cooling system control system in the embodiment of the present application is as follows: the temperature monitoring module is used for monitoring the internal environment temperature of the energy storage unit and the cooling water temperature in the water pipeline in real time, so as to output a temperature signal to the control valve group. The control valve group controls the conduction of the pipeline circuit of the compressor liquid cooling system and the heat pipe liquid cooling system according to the temperature condition. Specifically, when the temperature monitoring module detects that the internal environment temperature of the energy storage unit is less than the return liquid temperature in the water pipeline, the control valve group makes the cooling circuit of the heat pipe liquid cooling system conductive. The water vapor generated by the high temperature of the refrigerant in the water pipeline of the plate heat exchanger 2 is cooled along the pipeline of the heat pipe liquid cooling system, and is converted into a liquid state and flows back to the plate heat exchanger 2, so as to cool the refrigerant in the water circuit loop and realize the liquid cooling function. When the temperature monitoring module continuously detects that the internal environment temperature of the energy storage unit is always less than the return liquid temperature in the water pipeline, it is indicated that the heat pipe liquid cooling system alone cannot meet the cooling and temperature reduction requirement. The control valve group makes the cooling circuit of the compressor liquid cooling system conductive, and the compressor is started. The compressor is used for compressing and cooling the water vapor generated by the high temperature of the refrigerant, converting it into a liquid state, flowing back to the plate heat exchanger 2, and cooling the refrigerant in the water circuit loop of the plate heat exchanger 2. The refrigerant can be simultaneously cooled by the heat pipe liquid cooling system and the compressor liquid cooling system. When the internal environment temperature of the energy storage unit is greater than or equal to the return liquid temperature, the control valve group makes the circuit of the heat pipe liquid cooling system disconnected, and only the compressor liquid cooling system is used for refrigeration regulation. In the liquid cooling process of the entire energy storage unit, the heat pipe liquid cooling system or the compressor liquid cooling system can be controlled according to the internal environment temperature of the energy storage unit and the return liquid temperature, so that the energy storage unit does not always use the compressor liquid cooling system for refrigeration, thereby effectively improving the energy efficiency of the energy storage unit. The liquid cooling circuits of the heat pipe liquid cooling system and the compressor liquid cooling system are completely independent and do not interfere with each other, and can be operated simultaneously. The opening point of the heat pipe liquid cooling system is higher, so that the comprehensive energy efficiency of the energy storage unit is higher.

[0034] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A dual-cold-source energy storage liquid cooling system, characterized in that: The invention comprises a compressor liquid cooling system, a heat pipe liquid cooling system, a plate heat exchanger (2), a temperature monitoring module and a control valve group. The plate heat exchanger (2) is provided with a water pipe, a first liquid cooling pipe and a second liquid cooling pipe. The water pipe is used to circulate cooling water. The first liquid cooling pipe is connected to the compressor liquid cooling system, and the second liquid cooling pipe is connected to the heat pipe liquid cooling system. The temperature monitoring module is respectively provided on the water circuit, the compressor liquid cooling system and the pipeline loop of the heat pipe liquid cooling system. The control valve group is respectively provided on the water circuit, the compressor liquid cooling system and the pipeline loop of the heat pipe liquid cooling system. The control valve group is electrically connected to the temperature monitoring module and controls the closed state of the valve body according to the temperature signal.

2. The dual-cold-source energy storage liquid cooling system according to claim 1, characterized in that: The compressor liquid cooling system comprises a compressor body (1), a first condenser (3) and a drying filter, wherein the compressor body (1), the first condenser (3) and the drying filter are connected in sequence through a pipeline to form a closed loop, the control valve group comprises an electronic expansion valve, and the electronic expansion valve is arranged on the loop of the compressor liquid cooling system, the temperature monitoring module comprises a first temperature sensor and a second temperature sensor, the first temperature sensor and the second temperature sensor are arranged on the loop of the compressor liquid cooling system, the first temperature sensor is used to detect the temperature of the refrigerant input into the plate exchanger (2), and the second temperature sensor is used to detect the suction temperature input into the compressor.

3. The dual-cold-source energy storage liquid cooling system according to claim 1, characterized in that: The heat pipe liquid cooling system comprises a second condenser (4), the second condenser (4) is connected to the plate exchanger (2) through a pipeline to form a closed loop, and the control valve group comprises a first ball valve and a second ball valve, and the first ball valve and the second ball valve are arranged on the loop of the heat pipe liquid cooling system.

4. The dual-cold-source energy storage liquid cooling system according to claim 3, characterized in that: The second condenser (4) is arranged above the plate exchanger (2).

5. The dual-cold-source energy storage liquid cooling system according to claim 1, characterized in that: The water pipe on the plate changer (2) is provided with a return liquid port and a liquid supply port, the return liquid port is connected to a return liquid pipe, the return liquid pipe is provided with a water pump, the control valve group includes a liquid adding valve, the liquid adding valve is provided on the return liquid pipe, the temperature monitoring module includes a return liquid temperature sensor, the return liquid temperature sensor is provided at the pipe mouth of the return liquid pipe, the pipe mouth of the return liquid pipe is provided with an automatic exhaust valve and an expansion tank, the liquid supply port of the plate changer (2) is connected to the liquid supply pipe, the liquid supply pipe is provided with a PCT electric heater, the liquid supply port of the liquid supply pipe is provided with a liquid supply pressure gauge, the temperature monitoring module also includes a liquid supply temperature sensor, the liquid supply temperature sensor is provided at the pipe mouth of the liquid supply pipe.

6. The dual-cold-source energy storage liquid cooling system according to claim 1, characterized in that: The temperature monitoring module further includes an internal ambient temperature sensor, which is electrically connected to the control valve group.

7. The dual-cold-source energy storage liquid cooling system according to claim 2, characterized in that: A pressure detection module is also provided on the loop of the compressor liquid cooling system. The pressure detection module is provided at the air inlet and the air outlet of the compressor body (1) and is used to monitor the suction pressure and exhaust pressure of the compressor body (1) in real time.

8. The dual-cold-source energy storage liquid cooling system according to claim 5, characterized in that: A liquid return pressure gauge is also provided at the pipe mouth of the liquid return pipe.

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