General performance test system and test method for single-phase fluid loop for satellites

Abstract

The application provides a general performance test system and test method for a single-phase fluid circuit of a satellite, comprising: a driving pump, a heat sink, a phase change heat exchanger, a flow meter, a flow valve, a thermocouple and a control valve; the driving pump, the heat sink and the phase change heat exchanger are connected in series to form a main path of the general performance test system; the driving pump drives the working medium to flow, and the heat generated by the heat sink is taken away through heat exchange and stored at the phase change heat exchanger; the flow meter and the flow valve are connected to the main path and used for accurately adjusting the flow of the main path; the thermocouple is arranged on the main path and arranged at both ends of the driving pump, the heat sink and the phase change heat exchanger; and the control valve is connected in parallel at the driving pump, the heat sink and the phase change heat exchanger to short-circuit the components or test branches. The application has the effects of saving time and resources, not needing to assemble the components into the whole satellite, quickly testing the performance of the fluid circuit components and the system, and reducing the consumption of manpower, material resources and time.

Description

Technical Field

[0001] This invention belongs to the field of aerospace single-phase fluid circuit performance testing technology, specifically, it relates to a universal performance testing system and testing method for space-based single-phase fluid circuits. Background Technology

[0002] Pump-driven fluid loop systems are increasingly being used in spacecraft such as satellites and space stations due to their excellent heat transfer performance. The system consists of components such as a drive pump, heat sink, phase change heat exchanger, liquid reservoir, and valves. During operation, the drive pump drives the working fluid to flow for heat exchange. In order to verify the performance of each component of the system, performance tests need to be conducted on each component, including pressure, flow resistance, temperature, heat dissipation, etc. under different operating conditions. At the same time, in order to verify the heat transfer performance of the fluid loop system.

[0003] Patent document CN111918535B discloses a spaceborne and ground-based single-phase fluid loop heat dissipation system, comprising: a spacecraft mounting plate, on the inner surface of which one or more spaceborne units are fixed; a spaceborne single-phase fluid loop heat dissipation system, arranged within the spacecraft mounting plate, configured to transfer heat with the spacecraft mounting plate and to uniformly distribute the temperature in various areas of the spacecraft mounting plate; and a ground-based single-phase fluid loop heat dissipation system, arranged on the outer surface of the spacecraft mounting plate, configured to transfer heat with the spacecraft mounting plate and to remove heat from the spacecraft mounting plate.

[0004] However, in order to verify the heat exchange performance of the fluid loop system, the technical solutions such as patent document CN111918535B generally require the integration and assembly of each component into a complete satellite state before system performance testing can be carried out, which requires a lot of manpower, material resources and time.

[0005] To save time and resources, and to facilitate rapid performance testing of fluid loop components and systems without integrating individual components into a complete satellite configuration, this invention presents a universal performance testing system and method for satellite-use single-phase fluid loops, thus solving the aforementioned problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a universal performance testing system and method for single-phase fluid loops used in spacecraft.

[0007] A universal performance testing system for single-phase fluid loops for space applications, provided by the present invention, includes: a drive pump, a heat sink, a phase change heat exchanger, a flow meter, a flow valve, a thermocouple, and a control valve; The drive pump, heat sink, and phase change heat exchanger are connected in series to form the main circuit of the generalized performance testing system; the drive pump drives the working fluid to flow, and through heat exchange, it removes the heat generated by the heat sink and carries it to the phase change heat exchanger for storage. The flow meter and flow valve are connected to the main line for precise regulation of the flow rate in the main line; the thermocouples are arranged in the main line and respectively set at both ends of the drive pump, heat sink and phase change heat exchanger. The control valves at the drive pump, heat sink, and phase change heat exchanger are connected in parallel to short-circuit the component or test branch.

[0008] Preferably, the system further includes: pressure gauges; pressure gauges and thermocouples are installed at the inlet and outlet of the drive pump, heat sink, and phase change heat exchanger; the pressure gauges are used to measure the pressure changes at the inlet and outlet and convert them for flow resistance detection; the thermocouples are used to measure the temperature changes at the inlet and outlet for heat dissipation detection; the thermocouples are T-type thermocouples; and all thermocouples must be connected to a zero-degree thermostat for a common zero point.

[0009] Preferably, the system can set the heat sink heat consumption and temperature control requirements based on actual working conditions, and determine the flow range of the working fluid in the fluid loop system by adjusting the speed range of the drive pump, thereby confirming the control strategy and parameters of the pump drive controller. The system measures the heat collection performance of the phase change heat exchanger by measuring the outlet temperature of the phase change heat exchanger under different working fluid flow rates and phase change heat exchanger inlet temperature conditions. The system measures the heat exchange performance of the heat sink by measuring the outlet temperature of the heat sink under different working fluid flow rates and heat sink inlet temperature conditions.

[0010] Preferably, the system further includes: a filter connected in series before the drive pump for filtering particulate matter in the system flow channel; the filter is replaceable and has a filtration level of no more than 1 μm.

[0011] Preferably, the system further includes: a quick disconnect device and a bellows, wherein the inlet and outlet of the drive pump, heat sink, and phase change heat exchanger are connected to the main circuit by the quick disconnect device; the bellows is connected between the inlet and outlet of the drive pump, heat sink, and phase change heat exchanger and the quick disconnect device.

[0012] Preferably, the control valve includes: control valve, control valve, control valve, control valve, control valve, control valve, control valve, control valve, control valve; the thermocouple includes: thermocouple, thermocouple, thermocouple, thermocouple, thermocouple, thermocouple; the pressure gauge includes: pressure gauge, pressure gauge, pressure gauge, pressure gauge, pressure gauge, pressure gauge; the bellows includes: bellows, bellows, bellows, bellows, bellows, bellows; the quick disconnect device includes: quick disconnect device, quick disconnect device, quick disconnect device, quick disconnect device, quick disconnect device, quick disconnect device, quick disconnect device; the system also includes: temperature control valve, plate heat exchanger, temperature control unit, gas source, pressure reducing valve, liquid receiver, supply and discharge valve, and built-in drive pump; The main line starts from the outlet of the flow valve and forms two branches. The first branch is connected in series with a quick disconnect device, a bellows, a heat sink, a bellows, and a quick disconnect device. The first branch is connected to the heat sink in one direction away from the flow valve. The pressure gauge and thermocouple are connected to the inlet end of the heat sink, and the pressure gauge and bellows are connected to the outlet end of the heat sink. The second branch is connected in series with a control valve. The outlet ends of the first branch and the second branch merge into the main line. The main path is further divided into a third branch and a fourth branch. A control valve is connected in series on the third branch, and the fourth branch is connected to the inlet of the temperature control valve after the control valve. The temperature control valve is divided into two outlets. One outlet merges into the third branch, and the other outlet is connected to the first passage of the plate heat exchanger and then merges into the third branch. The two ends of the second passage of the plate heat exchanger are connected to the inlet and outlet of the temperature control unit through quick disconnectors to form a loop. After the third and fourth branches merge into the main branch, they split into the fifth and sixth branches. The fifth branch is connected in series with a quick disconnect device, a bellows, a phase change heat exchanger, a bellows, and a quick disconnect device. The fifth branch is bidirectionally connected to the phase change heat exchanger. Pressure gauges and thermocouples are connected to both ends of the phase change heat exchanger. The sixth branch is connected in series with control valves and then merges with the rear end of the fifth branch. The fifth branch connects to the control valve and the first liquid line end of the reservoir near the rear end of the sixth branch. The second liquid line end of the reservoir opens outward after the control valve is connected in series. The gas source is connected to the gas line end of the reservoir in series with the pressure reducing valve. The main road, after the fifth and sixth branches merge, splits into the seventh and eighth branches. The seventh branch connects to a drain valve in series and then opens outwards. The eighth branch connects to a filter and then splits into the ninth and tenth branches. The ninth branch connects to a quick disconnect device, a bellows, a drive pump, a bellows, and a quick disconnect device in series. The ninth branch connects to the drive pump in one direction along the direction closest to the flow valve. Pressure gauges are connected to both ends of the drive pump, and thermocouples are connected to both ends of the ninth branch. The tenth branch connects to a control valve in series and then merges with the rear end of the ninth branch to form the main road, which then splits into the eleventh and twelfth branches. The eleventh branch is connected in series with a control valve and a built-in drive pump; the twelfth branch is connected in series with a control valve and then merges with the eleventh branch to return to the main flow valve.

[0013] Preferably, the control valve and the control valve are ball valves. The on / off state of the control valve and the control valve are coordinated to control whether the built-in drive pump is connected to the system as a fluid circulation power source. When the control valve is closed and the control valve is open, the built-in drive pump is short-circuited, and the external drive pump of the product under test is used as a power source. When the control valve is open and the control valve is closed, and the built-in drive pump is started, it is used as the system power source to drive the flow of fluid working medium for performance testing of other products. When only the performance of phase change heat exchanger or heat sink is tested, the system's built-in drive pump is used as a power source to drive fluid flow for performance testing of the matched product. The control valves mentioned are all ball valves. Adjusting the opening and closing of these control valves regulates whether the temperature control valve and plate heat exchanger are connected to the system for heat exchange. When the control valve is closed or open, the fluid flows through the temperature control valve and plate heat exchanger for heat exchange. The fluid temperature can be adjusted by regulating the temperature control unit, thereby controlling the temperature of the fluid within the system. When the control valve is open or closed, the fluid flows directly to the control valve or quick disconnector, and the fluid does not exchange heat with the external system. The control valve controls whether the liquid reservoir is connected to the system. When the control valve is open, or when it is closed, the liquid side of the liquid reservoir can be pushed into the system for replenishment by pressurized air source, or the fluid can be pushed into the liquid reservoir for depressurization when the pressure of the main system pipeline fluctuates. When the control valve is closed, it tests the situation where the liquid volume inside the system is constant and the pressure fluctuates. The control valve, control valve, and control valve are all used to control the product under test. During testing, at least one component must be connected. When not connected to the system, it needs to be shorted to ensure system flow, or if the test is not related to the component, it can be shorted. Before testing, the generalized performance testing system needs to be evacuated and vented before the working medium is added. Before adding the working medium, the internal vacuum degree must not exceed 1 Pa to ensure that non-condensable gases in the system are removed. The adding pressure is 0.3 MPa and the adding accuracy is not greater than 1 g. The pressure reducing valve is connected to the gas source and is used to control the gas source pressure and stability. The liquid reservoir can balance the liquid volume in the main pipeline by controlling the gas source pressure; the filler valve is connected to the main pipeline and is used to fill the system with liquid working fluid through the valve using ground equipment before system testing; and to drain the liquid in the system through the valve after testing; the liquid reservoir is separated into gas and liquid by a diaphragm, and the gas end of the liquid reservoir is connected to an external gas source, with the gas source pressure being consistent with the pressure inside the system; The plate heat exchanger is used to regulate the main circuit temperature by adjusting the temperature control unit during performance testing. When the inlet temperature of the phase change heat exchanger is low, the temperature control unit temperature can be manually increased to quickly increase the inlet temperature. When the inlet temperature of the phase change heat exchanger is high, the temperature control unit temperature can be manually decreased to quickly decrease the inlet temperature. The temperature control valve automatically and precisely adjusts the flow rate into the plate heat exchanger by combining a pre-configured temperature control valve program with the inlet temperature of the phase change heat exchanger, thereby precisely adjusting the inlet temperature of the phase change heat exchanger.

[0014] According to the present invention, a method for adjusting a universal performance testing system for a single-phase fluid loop in space is provided. The method includes adjusting the pressure of the gas source by adjusting the switch of the pressure reducing valve, thereby achieving a balance between the pressures at both ends of the gas and liquid in the reservoir. By adjusting the control valves, the opening and closing of the control valves can be controlled to determine whether the heat sink, phase change heat exchanger, and drive pump under test are connected to the main circuit system for performance testing and test combination status. By adjusting the temperature of the temperature control unit, the heat exchange rate with the plate heat exchanger can be increased, thereby quickly adjusting the temperature of the system working fluid. By adjusting the opening and closing of the control valve, it is possible to control whether the plate heat exchanger is connected to the system, and thus control whether a temperature control unit is needed for auxiliary heat exchange. By adjusting the temperature control valve, the flow rate of the working fluid entering the plate heat exchanger can be controlled, thereby precisely regulating the temperature of the working fluid after heat exchange. Quick disconnectors allow heat sink components to be connected to the test system; quick disconnectors allow drive pump components to be connected to the test system; connecting quick disconnectors allows phase changer components to be connected to the test system. By connecting an external filling device and adjusting the filling and draining valves, the system can achieve vacuuming and working fluid filling functions; The amount of working fluid added can be adjusted by regulating the opening and closing of the control valve at the bottom of the reservoir.

[0015] According to the present invention, a test method for a universal performance testing system for single-phase fluid loops used in space is provided, which employs the universal performance testing system for single-phase fluid loops used in space and includes the following steps: Step S1: Build a universal performance testing platform for single-phase fluid loops for space applications. This platform will include control valves, built-in drive pumps, flow meters, flow valves, quick disconnectors, control valves, temperature control valves, plate heat exchangers, quick disconnectors, temperature control units, quick disconnectors, control valves, quick disconnectors, gas sources, pressure reducing valves, liquid receivers, control valves, supply and exhaust valves, filters, thermocouples, quick disconnectors, quick disconnectors, thermocouples, and control valves. This platform will serve as a universal interface, with the quick disconnectors acting as external interfaces. Step S2: Connect the bellows, pressure gauge, drive pump, pressure gauge, and bellows in series as the drive pump assembly, and connect it to the general performance test platform for single-phase fluid circuits in space via a quick disconnector. Step S3: Connect the bellows, pressure gauge, thermocouple, phase change heat exchanger, and bellows in series as a phase change heat exchanger assembly, and then connect it to the general performance test platform for single-phase fluid loops in space via a quick disconnector. Step S4: Connect the bellows, pressure gauge, thermocouple, heat sink, control valve, and bellows in series as a heat sink assembly, and connect it to the general performance test platform for single-phase fluid loops in space via a quick disconnector. Step S5: Set all valves to the closed position, and open the control valves to connect the main circuit. Step S6: Open the filler valve and connect the vacuum filling equipment. Use the vacuum filling equipment to evacuate the system to below 1 Pa. Then add the predetermined amount of working fluid. Adjust the pressure reducing valve to 0.4 MPa on the gas side of the liquid reservoir until the gas and liquid sides are balanced. Close the filler valve and disconnect the vacuum filling equipment. Step S7: Start the heat sink, set its heat consumption to 500W, and set the temperature control unit to maintain a constant temperature of 2℃; Step S8: Read the thermocouple and thermocouple temperature, and read the flow rate of the flow meter; start the drive pump, and adjust the drive pump speed and temperature control valve in sequence to adjust the flow rate and temperature boundary to control the flow rate to 2-8 L / min and the heat sink inlet temperature to 7℃-14℃ in sequence. Step S9: After the system temperature stabilizes, record the temperature, pressure, flow rate, drive pump speed, voltage, and current of the measured system during the process, as the control strategy for the fluid loop system under this operating condition; Step S10: Modify the heat sink heat dissipation to 1000W; Repeat steps S8 and S9 as the control strategy for the fluid loop system under this operating condition.

[0016] According to the present invention, a test method for a universal performance testing system for single-phase fluid loops used in space is provided, which employs the universal performance testing system for single-phase fluid loops used in space and includes the following steps: Step S1: Build a universal performance testing platform for single-phase fluid loops for space applications. This platform will include control valves, built-in drive pumps, flow meters, flow valves, quick disconnectors, control valves, temperature control valves, plate heat exchangers, quick disconnectors, temperature control units, quick disconnectors, control valves, quick disconnectors, gas sources, pressure reducing valves, liquid receivers, control valves, supply and exhaust valves, filters, thermocouples, quick disconnectors, quick disconnectors, thermocouples, and control valves. This platform will serve as a universal interface, with the quick disconnectors acting as external interfaces. Step S2: Connect the bellows, pressure gauge, drive pump, pressure gauge, and bellows in series as the drive pump assembly, and connect it to the general performance test platform for single-phase fluid circuits in space via a quick disconnector. Step S3: Connect the bellows, pressure gauge, thermocouple, phase change heat exchanger, and bellows in series as a phase change heat exchanger assembly, and then connect it to the general performance test platform for single-phase fluid loops in space via a quick disconnector. Step S4: Set all valves to the closed position, and open the control valves to connect the main circuit. Step S5: Open the filler valve and connect the vacuum filling equipment. Use the vacuum filling equipment to evacuate the system to below 1 Pa. Then add the predetermined amount of working fluid. Adjust the pressure reducing valve to 0.4 MPa on the gas side of the liquid reservoir until the gas and liquid sides are balanced. Close the filler valve and disconnect the vacuum filling equipment. Step S7: Start the temperature control unit and set the temperature control unit to a constant temperature of 60℃; Step S8: Start the drive pump, read the temperature values ​​of the thermocouples, and adjust the temperature control valve to control the inlet temperature of the phase change heat exchanger to 25-40℃; Step S9: After the system temperature stabilizes, read the temperature values ​​of the thermocouples and substitute them into the calculation to obtain the heat collection amount of the phase change heat exchanger under different operating conditions.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention forms a single-phase universal test platform by pre-installing components such as a drive pump, plate heat exchanger, and valves. Then, the product under test is connected to the platform interface through a quick disconnector to form a test system loop, thereby confirming the fluid performance or thermal management performance of the product under test.

[0018] 2. This invention combines the drive pump assembly, heat sink assembly, and phase change heat exchanger assembly for testing, which can replace the entire satellite system for fluid loop system testing, reducing the number of satellite installations. At the same time, it obtains the optimal control strategy and parameters of the drive pump according to actual operating conditions.

[0019] 3. This invention tests the heat collection capacity of the phase change heat exchanger by combining the drive pump assembly and the phase change heat exchanger assembly and adjusting the working fluid flow rate and temperature.

[0020] 4. This invention tests the heat exchange capacity of the heat sink by combining the drive pump assembly and the heat sink assembly and adjusting the working fluid flow rate and temperature.

[0021] 5. This invention allows for the connection of any component via a quick disconnect device. By testing the pressure difference between its two ends at different flow rates, its flow resistance can be confirmed, thereby assisting in system design and calibration. Attached Figure Description

[0022] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a diagram of the generalized performance testing system for single-phase fluid loops used in space, provided by the present invention.

[0023] The diagram shows: 1. Control valve I; 2. Built-in drive pump; 3. Flow meter; 4. Flow valve; 5. Quick disconnector I; 6. Bellows I; 7. Pressure gauge I; 8. Thermocouple I; 9. Heat sink; 10. Control valve II; 11. Thermocouple II; 12. Pressure gauge II; 13. Bellows II; 14. Quick disconnector II; 15. Control valve III; 16. Control valve IV; 17. Temperature control valve; 18. Plate heat exchanger; 19. Quick disconnector III; 20. Temperature control unit; 21. Quick disconnector IV; 23. Control valve VI; 24. Quick disconnector V; 25. Bellows III; 26. 1. Pressure gauge III; 27. Thermocouple III; 28. Phase change heat exchanger; 29. ​​Thermocouple IV; 30. Pressure gauge IV; 31. Bellows IV; 32. Quick disconnector VI; 33. Gas source; 34. Pressure reducing valve; 35. Liquid receiver; 36. Control valve VII; 37. Control valve VIII; 39. Inlet / outlet valve; 40. Filter; 41. Thermocouple V; 42. Quick disconnector VII; 43. Bellows V; 44. Pressure gauge V; 45. Drive pump; 46. Pressure gauge VI; 47. Bellows VI; 48. Quick disconnector VIII; 49. Thermocouple VI; 50. Control valve X; 51. Control valve XI. Detailed Implementation

[0024] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0025] like Figure 1 As shown, a generalized performance testing system for single-phase fluid loops in space includes: a drive pump 45, a heat sink 9, a phase change heat exchanger 28, a filter 40, a flow meter 3, a flow valve 4, a quick disconnector, a bellows, a thermocouple, a pressure gauge, and a control valve.

[0026] The drive pump 45, heat sink 9, and phase change heat exchanger 28 are connected in series to form the main circuit of the generalized performance testing system. During operation, the drive pump 45 drives the working fluid to flow, and through heat exchange, it removes the heat generated by the heat sink 9 and carries it to the phase change heat exchanger 28 for storage.

[0027] The flow meter 3 and flow valve 4 are connected to the main road and are used to precisely regulate the flow of the main road. The thermocouples are connected to the main circuit and are respectively set at both ends of the drive pump 45, heat sink 9 and phase change heat exchanger 28. The thermocouples are T-type thermocouples. Preferably, all thermocouples need to be connected to a zero-degree thermostat to achieve a common zero point in order to ensure temperature measurement accuracy. The generalized performance testing system connects control valves in parallel at the drive pump 45, heat sink 9, and phase change heat exchanger 28 to short-circuit the component; preferably, pressure gauges and thermocouples are installed at the inlet and outlet of the drive pump 45, heat sink 9, and phase change heat exchanger 28. When the system is running, the flow resistance is detected by measuring the changes in inlet and outlet pressures and converting them, and the heat dissipation is detected by measuring the changes in inlet and outlet temperatures. The control valve is used to control the on / off state of each branch of the test system. Preferably, the valve is a high-pressure resistant ball valve. Preferably, the generalized performance testing system can set the heat consumption and temperature control requirements of the heat sink 9 based on actual working conditions, and determine the flow range of the working fluid in the fluid loop system by adjusting the speed range of the drive pump 45, thereby confirming the control strategy and parameters of the pump drive controller. Preferably, the generalized performance testing system measures the heat collection performance of the phase change heat exchanger 28 by measuring the outlet temperature of the phase change heat exchanger 28 under different working fluid flow rates and inlet temperature conditions. Preferably, the generalized performance testing system measures the heat exchange performance of the heat sink 9 by measuring the outlet temperature of the heat sink 9 under different working fluid flow rates and inlet temperature conditions. The filter 40 is connected in series before the drive pump 45 to filter particulate matter in the system flow channel to prevent particulate matter from damaging the system. Preferably, the filter 40 is replaceable and the filtration level is no greater than 1μm. The filter 40 can filter out excess matter larger than 1μm. Its dirt holding capacity is selected according to the size of the workpiece and is replaced regularly.

[0028] The inlet and outlet of the drive pump 45, heat sink 9, and phase change heat exchanger 28 are connected to the main circuit via quick-connectors. These quick-connectors are used to connect the product under test (DUT) to the system. A bellows connects the inlet and outlet of the drive pump 45, heat sink 9, and phase change heat exchanger 28 to the quick-connectors. When connecting the bellows to the system, the end connected to the main circuit first connects to the male connector of the quick-connector, and then the female connector of the quick-connector is used to connect it to the main circuit. The other end of the bellows connects to the DUT, with the interface type adapted to the DUT's interface, typically a plunger connector. This provides a flexible connection to the DUT. Since DUTs vary in size and interface type, the bellows' flexibility allows for easy replacement of both ends to accommodate different DUT interface types, enabling quick and customizable flexible connections.

[0029] In one embodiment, the control valves include: control valve I1, control valve II10, control valve III15, control valve IV16, control valve VI23, control valve VII36, control valve VIII37, control valve X50, and control valve XI51; the thermocouples include: thermocouple I8, thermocouple II11, thermocouple III27, thermocouple IV29, thermocouple V41, and thermocouple VI49; the pressure gauges include: pressure gauge I7, pressure gauge II12, pressure gauge III26, pressure gauge IV30, pressure gauge V44, and pressure gauge VI46; and the bellows include: bellows I6, bellows II13, and bellows... III25, bellows IV31, bellows V43, bellows VI47; quick disconnectors include: quick disconnector I5, quick disconnector II14, quick disconnector III19, quick disconnector IV21, quick disconnector V24, quick disconnector VI32, quick disconnector VII42, quick disconnector VIII48; drive pumps include: built-in drive pump 2, drive pump 45; other independent components include: flow meter 3, flow valve 4, heat sink 9, temperature control valve 17, plate heat exchanger 18, temperature control unit 20, phase change heat exchanger 28, gas source 33, pressure reducing valve 34, liquid receiver 35, supply and discharge valve 39, filter 40.

[0030] The main line originates from the outlet of flow valve 4 and branches into two branches. The first branch connects in series with quick disconnector I5, bellows I6, heat sink 9, bellows II13, and quick disconnector II14. This first branch connects unidirectionally to heat sink 9 in the direction away from flow valve 4. Pressure gauge I7 and thermocouple I8 are connected to the inlet end of heat sink 9, while pressure gauge II11 and bellows II13 are connected to the outlet end of heat sink 9. The second branch connects in series with control valve II10. The outlet ends of the first and second branches merge into the main line.

[0031] The main path further divides into a third branch and a fourth branch. Control valve III15 is connected in series on the third branch, and the fourth branch connects to control valve IV16 and then to the inlet of temperature control valve 17. Temperature control valve 17 then branches into two outlets: one outlet merges into the third branch, and the other outlet connects to the first passage of plate heat exchanger 18 and then merges into the third branch. The two ends of the second passage of plate heat exchanger 18 are connected to the inlet and outlet of temperature control unit 20 via quick-connect couplings IV21 and III19 to form a loop.

[0032] The third and fourth branches merge into the main branch, which then splits into the fifth and sixth branches. The fifth branch connects in series with quick-connect valve V24, bellows III25, phase changer 28, bellows IV31, and quick-connect valve VI32. The fifth branch is bidirectionally connected to the phase changer 28. Pressure gauge III26, thermocouple III27, thermocouple IV29, and pressure gauge IV30 are connected to both ends of the phase changer 28. The sixth branch connects in series with control valve VI23 and then merges with the rear end of the fifth branch.

[0033] The fifth branch is connected to the control valve VIII 37 and the first liquid line end of the reservoir 35 near the rear end of the sixth branch. The second liquid line end of the reservoir 35 is connected in series with the control valve VII 36 and then opens to the outside. The gas source 33 is connected in series with the pressure reducing valve 34 and connected to the gas line end of the reservoir 35.

[0034] The main road after the fifth and sixth branches merge is divided into the seventh and eighth branches. The seventh branch connects to the drain valve 39 in series and then opens outward. The eighth branch connects to the filter 40 and then divides into the ninth and tenth branches. The ninth branch connects to the quick disconnector VII42, bellows V43, drive pump 45, bellows VI47, and quick disconnector VIII48 in series. The ninth branch connects to the drive pump 45 in one direction along the direction closest to the flow valve 4. Pressure gauges V44 and VI46 are connected to the two ends of the drive pump 45 respectively. Thermocouples V41 and VI49 are connected to the two ends of the ninth branch respectively. The tenth branch connects to the control valve X50 in series and then merges with the rear end of the ninth branch to form the main road, which then divides into the eleventh and twelfth branches.

[0035] The eleventh branch is connected in series with control valve I1 and built-in drive pump 2; the twelfth branch is connected in series with control valve XI51 and then merges with the eleventh branch to return to the main flow valve 4.

[0036] Control valves I1 and XI51 are ball valves. By coordinating the opening and closing of control valves I1 and XI51, the system's built-in drive pump 2 is connected as a fluid circulation power source. When control valve I1 is closed and control valve XI51 is open, the built-in drive pump 2 is short-circuited, and the external drive pump 45 of the product under test is used as a power source. When control valve I1 is open and control valve XI51 is closed, and the built-in drive pump 2 is started, it serves as the system's power source, driving the fluid to flow for performance testing of other products.

[0037] Similarly, the drive pump 45 under test may sometimes not be connected to the system. When only the performance of the phase change heat exchanger 28 or heat sink 9 is being tested, there is a lack of power source. The system's built-in drive pump 2 serves as the power source to drive fluid flow for performance testing of other products.

[0038] Control valves Ⅲ15 and Ⅳ16 are both ball valves. By adjusting the opening and closing of control valves Ⅲ15 and Ⅳ16, the system can be controlled to determine whether the temperature control valve 17 and the plate heat exchanger 18 are connected to the system and exchange heat. When control valve Ⅲ15 is closed and control valve Ⅳ16 is open, the fluid flows through the temperature control valve 17 and the plate heat exchanger 18 for heat exchange. At this time, the fluid temperature can be adjusted by regulating the temperature control unit 20, thereby controlling the temperature of the fluid in the system. When control valve Ⅲ15 is open and control valve Ⅳ16 is closed, the fluid flows directly to control valve Ⅵ23 or quick disconnector Ⅴ24, and the fluid does not exchange heat with the external system.

[0039] Control valve VIII 37 controls whether the liquid reservoir 35 is connected to the system. When control valve VIII 37 is open and control valve VII 36 is closed, the lower end (liquid side) of the liquid reservoir 35 can be pushed into the system for replenishment via pressurized air source 33, or fluid can be pushed into the liquid reservoir 35 for depressurization when the pressure in the main system pipeline fluctuates. When control valve VIII 37 is closed, it tests the situation where the liquid volume inside the system is constant, but the pressure fluctuates. Control valves X50, II10, and VI23 all control the product under test. During testing, at least one component must be connected. When not connected to the system, it needs to be short-circuited to ensure system flow, or it can be short-circuited if the test is unrelated to that component.

[0040] Before testing, the generalized performance testing system needs to be evacuated and vented before the working medium is added. Preferably, the internal vacuum degree before addition should not exceed 1 Pa to ensure the removal of non-condensable gases in the system. Preferably, the addition pressure is 0.3 MPa and the addition accuracy is not greater than 1 g. The pressure reducing valve 34 is connected to the air source 33 and plays a role in controlling the pressure and stability of the air source 33.

[0041] The reservoir 35 is connected to the main line; the reservoir 35 can balance the liquid volume of the main line by controlling the pressure of the air source 33. If the liquid in the main line is too low, it will be squeezed in to replenish the liquid under pressure. If the liquid in the main line is too high, it will be squeezed back into the reservoir.

[0042] The filler valve 39 is connected to the main line and is mainly used to fill the system with liquid working fluid through the valve using ground equipment before system testing; and to drain the liquid in the system through the valve after testing.

[0043] The general performance testing system is connected to an external liquid reservoir 35, which serves as a liquid compensator under system pressure fluctuations. When the pressure in the system pipeline increases, liquid enters the liquid reservoir 35. When the pressure in the system pipeline decreases, liquid enters the system pipeline from the liquid reservoir 35 to replenish the liquid and ensure that the liquid fills the entire system cavity. The liquid reservoir 35 is internally separated into gas and liquid by a diaphragm. The liquid end of the liquid reservoir 35 is connected to the main circuit of the system and is placed in front of the drive pump 45 for timely liquid replenishment. The gas end of the liquid reservoir 35 is connected to an external gas source 33. Preferably, the pressure of the gas source 33 is consistent with the pressure inside the system.

[0044] The plate heat exchanger 18 is a dual-channel system, with two channels operating independently and capable of heat exchange. One channel is connected in series with the main circuit, and the other channel is connected to the temperature control unit 20. During performance testing, the temperature of the main circuit can be adjusted by regulating the temperature of the temperature control unit 20. Preferably, when the inlet temperature of the phase change heat exchanger 28 is low, the temperature of the temperature control unit 20 can be manually increased to rapidly raise the inlet temperature. When the inlet temperature of the phase change heat exchanger 28 is high, the temperature of the temperature control unit 20 can be manually decreased to rapidly lower the inlet temperature by dissipating heat.

[0045] The temperature control valve 17 is connected in series before the plate heat exchanger 18. Through the pre-configured temperature control valve 17 program combined with the inlet temperature of the phase change heat exchanger 28, the flow rate into the plate heat exchanger 18 is automatically and precisely adjusted, thereby precisely adjusting the inlet temperature of the phase change heat exchanger 28.

[0046] Preferably, the quick disconnector needs to be shut off and sealed in both directions during the quick disconnection process, and its internal liquid will hardly leak.

[0047] The general-purpose performance testing system is a closed system, with all components connected in a sealed manner. Welding or a combination of plunger threads and O-rings is preferred for sealing, ensuring a system leakage rate of no more than 1 x 10⁻⁶. -7 Pa·m / s; Preferably, the self-leakage rate of the components selected for the system, such as quick disconnectors, control valves, and flow meters, shall not exceed 1 x 10⁻³. -8 Pa·m / s.

[0048] This embodiment also provides an adjustment method for a universal performance testing system for single-phase fluid loops used in space, used to adjust the universal performance testing system for single-phase fluid loops used in space, the method including: By adjusting the switch of the pressure reducing valve 34, the pressure of the gas source can be adjusted, thereby achieving a balance between the gas and liquid pressures at both ends of the liquid reservoir.

[0049] By adjusting the opening and closing of control valve 10, control valve 23, or control valve 50, it is possible to determine whether the heat sink 9, phase change heat exchanger 28, and drive pump 45 to be tested are connected to the main circuit system for performance testing and test combination status.

[0050] By adjusting the temperature of the temperature control unit 20, the heat exchange rate with the plate heat exchanger 18 can be achieved, thereby quickly adjusting the temperature of the system working fluid.

[0051] By adjusting the opening and closing of control valve Ⅲ15, the connection of plate heat exchanger 18 to the system can be controlled, thereby controlling whether temperature control unit 20 is needed for auxiliary heat exchange.

[0052] By adjusting the temperature control valve 17, the flow rate of the working fluid entering the plate heat exchanger 18 can be controlled, thereby precisely adjusting the temperature of the working fluid after heat exchange.

[0053] Connecting quick disconnectors I5 and II14 allows the heat sink assembly 9 to be connected to the test system; connecting quick disconnectors VII42 and VIII48 allows the drive pump assembly 45 to be connected to the test system; connecting quick disconnectors V24 and VI32 allows the phase change heat exchanger assembly 28 to be connected to the test system.

[0054] By connecting an external filling device and adjusting the filling and draining valve 39, the system can achieve vacuuming and working fluid filling functions.

[0055] The amount of working fluid added can be adjusted by regulating the opening and closing of the control valve VII36 at the bottom of the reservoir.

[0056] This embodiment also provides a test method for a universal performance testing system for single-phase fluid loops used in space, the steps of which include: Example 1 Step S1: Construct a universal performance testing platform for single-phase fluid loops for space applications. This platform includes control valve I1, built-in drive pump 2, flow meter 3, flow valve 4, quick disconnector I5, quick disconnector II14, control valve III15, control valve IV16, temperature control valve 17, plate heat exchanger 18, quick disconnector III19, temperature control unit 20, quick disconnector IV21, control valve VI23, quick disconnector V24, quick disconnector VI32, gas source 33, pressure reducing valve 34, liquid receiver 35, control valve VII36, control valve VIII37, supply and exhaust valve 39, filter 40, thermocouple V41, quick disconnector VII42, quick disconnector VIII48, thermocouple VI49, control valve X50, and control valve XI51. This universal platform will use the quick disconnectors as external interfaces.

[0057] Step S2: Connect bellows V43, pressure gauge V44, drive pump 45, pressure gauge VI46, and bellows VI47 in series as a drive pump assembly, and connect it to the universal performance test platform for single-phase fluid circuits for space use through quick disconnectors VII42 and VIII48.

[0058] Step S3: Connect the bellows III25, pressure gauge III26, thermocouple III27, phase change heat exchanger 28, thermocouple IV29, pressure gauge IV30, and bellows IV31 in series as a phase change heat exchanger assembly, and then connect it to the universal performance test platform for single-phase fluid loops for space use through quick disconnectors V24 and VI32.

[0059] Step S4: Connect the bellows I6, pressure gauge I7, thermocouple I8, heat sink 9, control valve II10, thermocouple II11, pressure gauge II12, and bellows II13 in series as a heat sink assembly, and connect it to the universal performance test platform for single-phase fluid circuits for space use through quick disconnectors I5 and II14.

[0060] Step S5: Adjust all valves to the closed position, and open control valve XI51, control valve Ⅲ15, and control valve Ⅳ16 to connect the main circuit.

[0061] Step S6: Open the filler valve 39 and connect it to the vacuum filling equipment. Use the vacuum filling equipment to evacuate the system to below 1 Pa, then add the predetermined amount of working fluid. Adjust the pressure reducing valve 34 to the gas side pressure of the liquid reservoir to 0.4 MPa until the gas and liquid sides are balanced. Close the filler valve 39 and disconnect the vacuum filling equipment.

[0062] Step S7: Start the heat sink 9, set its heat consumption to 500W, and set the temperature control unit 20 to maintain a constant temperature of 2℃.

[0063] Step S8: Read the temperatures of thermocouple I8, thermocouple II11, thermocouple III27, and thermocouple IV29, and read the flow rate of flow meter 3; start drive pump 45, and adjust the speed of drive pump 45 and temperature control valve 17 in sequence to adjust the flow rate and temperature boundaries to control the flow rate to 2-8 L / min and the heat sink inlet temperature to 7℃-14℃ in sequence.

[0064] Step S9: After the system temperature stabilizes, record the temperature, pressure, flow rate, drive pump speed, voltage, and current of the measured system during the process, as the control strategy for the fluid loop system under this operating condition.

[0065] Step S10: Modify the heat sink 9 heat dissipation to 1000W.

[0066] Repeat steps S8 and S9 as the control strategy for the fluid loop system under this operating condition.

[0067] Example 2 Step S1: Construct a universal performance testing platform for single-phase fluid loops for space applications. This platform includes control valve I1, built-in drive pump 2, flow meter 3, flow valve 4, quick disconnector I5, quick disconnector II14, control valve III15, control valve IV16, temperature control valve 17, plate heat exchanger 18, quick disconnector III19, temperature control unit 20, quick disconnector IV21, valve VI23, quick disconnector V24, quick disconnector VI32, gas source 33, pressure reducing valve 34, liquid receiver 35, control valve VII36, control valve VIII37, supply and exhaust valve 39, filter 40, thermocouple V41, quick disconnector VII42, quick disconnector VIII48, thermocouple VI49, control valve X50, and control valve XI51. This universal platform will use the quick disconnectors as external interfaces.

[0068] Step S2: Connect bellows V43, pressure gauge V44, drive pump 45, pressure gauge VI46, and bellows VI47 in series as a drive pump assembly, and connect it to the universal performance test platform for single-phase fluid circuits for space use through quick disconnectors VII42 and VIII48.

[0069] Step S3: Connect the bellows III25, pressure gauge III26, thermocouple III27, phase change heat exchanger 28, thermocouple IV29, pressure gauge IV30, and bellows IV31 in series as a phase change heat exchanger assembly, and then connect it to the universal performance test platform for single-phase fluid loops for space use through quick disconnectors V24 and VI32.

[0070] Step S4: Adjust all valves to the closed position, and open control valve XI51, control valve II10, and control valve IV16 to connect the main circuit.

[0071] Step S5: Open the filler valve 39 and connect it to the vacuum filling equipment. Use the vacuum filling equipment to evacuate the system to below 1 Pa, then add the predetermined amount of working fluid. Adjust the pressure reducing valve 34 to the gas side pressure of the liquid reservoir to 0.4 MPa until the gas and liquid sides are balanced. Close the filler valve 39 and disconnect the vacuum filling equipment.

[0072] Step S7: Start the temperature control unit 20 and set the temperature control unit 20 to a constant temperature of 60℃.

[0073] Step S8: Start the drive pump 45, read the temperature values ​​of thermocouple III 27 and thermocouple IV 29, and adjust the temperature control valve 17 to control the inlet temperature of phase change heat exchanger 28 to 25-40℃.

[0074] Step S9: After the system temperature stabilizes, read the temperature values ​​of thermocouples III 27 and IV 29, and substitute them into the calculation to obtain the heat collection amount of phase change heat exchanger 28 under different operating conditions.

[0075] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0076] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A universal performance testing system for single-phase fluid loops used in spacecraft, characterized in that, include: Drive pump (45), heat sink (9), phase change heat exchanger (28), flow meter (3), flow valve (4), thermocouple, control valve; The drive pump (45), heat sink (9), and phase change heat exchanger (28) are connected in series to form the main circuit of the generalized performance testing system; the drive pump (45) drives the working fluid to flow, and through heat exchange, it removes the heat generated by the heat sink (9) and carries it to the phase change heat exchanger (28) for storage. The flow meter (3) and flow valve (4) are connected to the main road and are used to precisely regulate the flow rate of the main road; the thermocouples are arranged in the main road and are respectively set at both ends of the drive pump (45), heat sink (9) and phase change heat exchanger (28); The drive pump (45), heat sink (9), and phase change heat exchanger (28) are connected in parallel with control valves to short-circuit the component or test branch.

2. The universal performance testing system for single-phase fluid loops for space applications according to claim 1, characterized in that, The system also includes: pressure gauges, and pressure gauges and thermocouples are installed at the inlet and outlet of the drive pump (45), heat sink (9), and phase change heat exchanger (28). The pressure gauges are used to measure the pressure changes at the inlet and outlet and convert them for flow resistance detection. The thermocouples are used to measure the temperature changes at the inlet and outlet for heat dissipation detection. The thermocouples are T-type thermocouples, and all thermocouples need to be connected to a zero-degree thermostat for a common zero point.

3. The universal performance testing system for single-phase fluid loops for space applications according to claim 2, characterized in that, The system can set the heat consumption and temperature control requirements of the heat sink (9) based on the actual working conditions, and determine the flow range of the working fluid in the fluid loop system by adjusting the speed range of the drive pump (45), thereby confirming the control strategy and parameters of the pump drive controller. The system measures the heat collection performance of the phase change heat exchanger (28) by measuring the outlet temperature of the phase change heat exchanger (28) under different working fluid flow rates and inlet temperature conditions. The system measures the heat exchange performance of the heat sink (9) by measuring the outlet temperature of the heat sink (9) under different working fluid flow rates and heat sink (9) inlet temperature conditions.

4. The universal performance testing system for single-phase fluid loops for space applications according to claim 3, characterized in that, The system also includes a filter (40), which is connected in series before the drive pump (45) to filter particulate matter in the system flow channel; the filter (40) is replaceable and the filtration level is no greater than 1μm.

5. The universal performance testing system for single-phase fluid loops for space applications according to claim 4, characterized in that, The system also includes a quick disconnector and a bellows, with the inlet and outlet of the drive pump (45), heat sink (9), and phase change heat exchanger (28) connected to the main line by the quick disconnector; the bellows is connected between the inlet and outlet of the drive pump (45), heat sink (9), and phase change heat exchanger (28) and the quick disconnector.

6. The universal performance testing system for single-phase fluid loops used in space according to claim 5, characterized in that, The control valves include: control valve I (1), control valve II (10), control valve III (15), control valve IV (16), control valve VI (23), control valve VII (36), control valve VIII (37), control valve X (50), and control valve XI (51); the thermocouples include: thermocouple I (8), thermocouple II (11), thermocouple III (27), thermocouple IV (29), thermocouple V (41), and thermocouple VI (49); the pressure gauges include: pressure gauge I (7), pressure gauge II (12), pressure gauge III (26), pressure gauge IV (30), pressure gauge V (44), and pressure gauge VI (46); the bellows includes : Bellows I (6), Bellows II (13), Bellows III (25), Bellows IV (31), Bellows V (43), Bellows VI (47); Quick disconnectors include: Quick disconnector I (5), Quick disconnector II (14), Quick disconnector III (19), Quick disconnector IV (21), Quick disconnector V (24), Quick disconnector VI (32), Quick disconnector VII (42), Quick disconnector VIII (48); The system also includes: temperature control valve (17), plate heat exchanger (18), temperature control unit (20), gas source (33), pressure reducing valve (34), liquid receiver (35), supply and discharge valve (39), built-in drive pump (2); The main line starts from the outlet of the flow valve (4) and forms two branches. The first branch is connected in series with quick disconnector I (5), bellows I (6), heat sink (9), bellows II (13), and quick disconnector II (14). The first branch is connected to the heat sink (9) in one direction away from the flow valve (4). Pressure gauge I (7) and thermocouple I (8) are connected to the inlet end of the heat sink (9), and pressure gauge II (12) and bellows II (13) are connected to the outlet end of the heat sink (9). The second branch is connected in series with control valve II (10). The outlet ends of the first branch and the second branch merge into the main line. The main path is further divided into the third branch and the fourth branch. The third branch is connected in series with the control valve Ⅲ (15). The fourth branch is connected to the control valve Ⅳ (16) and then connected to the inlet of the temperature control valve (17). The temperature control valve (17) is divided into two outlets. One outlet flows into the third branch, and the other outlet is connected to the first passage of the plate heat exchanger (18) and then flows into the third branch. The two ends of the second passage of the plate heat exchanger (18) are connected to the inlet and outlet of the temperature control unit (20) through quick disconnectors Ⅳ (21) and Ⅲ (19) to form a loop. After the third and fourth branches merge into the main road, they are divided into the fifth and sixth branches. The fifth branch is connected in series with quick disconnector V (24), bellows III (25), phase change heat exchanger (28), bellows IV (31), and quick disconnector VI (32). The fifth branch is bidirectionally connected to the phase change heat exchanger (28). Pressure gauge III (26), thermocouple III (27), thermocouple IV (29), and pressure gauge IV (30) are respectively connected to both ends of the phase change heat exchanger (28). The sixth branch is connected in series with control valve VI (23) and then merges with the rear end of the fifth branch. The fifth branch is connected to the control valve VIII (37) and the first liquid line end of the reservoir (35) near the rear end of the sixth branch. The second liquid line end of the reservoir (35) is connected in series with the control valve VII (36) and then opens to the outside. The gas source (33) is connected in series with the pressure reducing valve (34) and connected to the gas line end of the reservoir (35). The main road after the fifth and sixth branches merge is divided into the seventh and eighth branches. The seventh branch is connected in series with the drain valve (39) and then opens outward. The eighth branch is connected to the filter (40) and then divided into the ninth and tenth branches. The ninth branch is connected in series with the quick disconnector VII (42), bellows V (43), drive pump (45), bellows VI (47), and quick disconnector VIII (48). The ninth branch is connected to the drive pump (45) in one direction along the direction close to the flow valve (4). Pressure gauge V (44) and pressure gauge VI (46) are connected to the two ends of the drive pump (45) respectively. Thermocouple V (41) and thermocouple VI (49) are connected to the two ends of the ninth branch respectively. The tenth branch is connected in series with the control valve X (50) and then merges with the rear end of the ninth branch to form the main road, which is then divided into the eleventh and twelfth branches. The eleventh branch is connected in series with control valve I (1) and built-in drive pump (2); the twelfth branch is connected in series with control valve XI (51) and then merges with the eleventh branch to return to the main flow valve (4).

7. The universal performance testing system for single-phase fluid loops for space applications according to claim 6, characterized in that, The control valves I (1) and XI (51) are ball valves. The on / off state of the control valves I (1) and XI (51) is coordinated to control whether the built-in drive pump (2) is connected to the system as a fluid circulation power source. When the control valve I (1) is closed and the control valve XI (51) is open, the built-in drive pump (2) is short-circuited. At this time, the external drive pump (45) of the test product is used as the power source. When the control valve I (1) is open and the control valve XI (51) is closed, the built-in drive pump (2) is started as the system power source to drive the fluid working medium to flow for the performance test of other products. When only the performance of the phase change heat exchanger (28) or heat sink (9) is tested, the built-in drive pump (2) of the system is used as the power source to drive the fluid flow for the performance test of the matching product. The control valves Ⅲ (15) and Ⅳ (16) are both control valves, specifically ball valves. By adjusting the opening and closing of control valves Ⅲ (15) and Ⅳ (16), the temperature control valve (17) and plate heat exchanger (18) are regulated to determine whether they are connected to the system and exchange heat. When control valve Ⅲ (15) is closed and control valve Ⅳ (16) is open, the fluid flows through the temperature control valve (17) and plate heat exchanger (18) for heat exchange. At this time, the fluid can be regulated by adjusting the temperature of the temperature control unit (20) to control the temperature of the fluid in the system. When control valve Ⅲ (15) is open and control valve Ⅳ (16) is closed, the fluid flows directly to control valve Ⅵ (23) or quick disconnector Ⅴ (24), and the fluid does not exchange heat with the external system. Control valve VIII (37) controls whether the liquid reservoir (35) is connected to the system. When control valve VIII (37) is open and control valve VII (36) is closed, the liquid side of the liquid reservoir (35) can be pushed into the system for replenishment by pressurized air source (33), or the fluid can be pushed into the liquid reservoir (35) for depressurization when the pressure of the main system pipeline fluctuates. When control valve VIII (37) is closed, the liquid volume inside the test system is constant and the pressure fluctuates. The control valves X (50), II (10), and VI (23) are all for controlling the product to be tested. During testing, at least one component must be connected. When not connected to the system, it needs to be short-circuited to ensure system flow, or when the test is not related to the component, it should be short-circuited. Before testing, the generalized performance testing system needs to be evacuated and vented before the working medium is added. Before adding the working medium, the internal vacuum degree must not exceed 1 Pa to ensure that non-condensable gases in the system are removed. The adding pressure is 0.3 MPa and the adding accuracy is not greater than 1 g. The pressure reducing valve (34) is connected to the gas source (33) and is used to control the pressure and stability of the gas source (33); The liquid reservoir (35) can balance the liquid volume of the main pipeline by controlling the pressure of the gas source (33); the filler valve (39) is connected to the main pipeline and is used to fill the system with liquid working fluid through the valve before the system test using ground equipment; and to drain the liquid in the system through the valve after the test is completed; the liquid reservoir (35) is gas-liquid separated by a diaphragm inside, and the gas end of the liquid reservoir (35) is connected to the gas source (33), and the pressure of the gas source (33) is consistent with the pressure inside the system; The plate heat exchanger (18) is used to adjust the temperature of the main circuit by adjusting the temperature of the temperature control unit (20) during performance testing; when the inlet temperature of the phase change heat exchanger (28) is low, the temperature of the temperature control unit (20) can be manually increased to input heat and quickly increase the inlet temperature; when the inlet temperature of the phase change heat exchanger (28) is high, the temperature of the temperature control unit (20) can be manually decreased to dissipate heat and quickly decrease the inlet temperature. The temperature control valve (17) automatically and precisely adjusts the flow rate into the plate heat exchanger (18) by combining the pre-configured temperature control valve (17) program with the inlet temperature of the phase change heat exchanger (28), thereby precisely adjusting the inlet temperature of the phase change heat exchanger (28).

8. An adjustment method for a universal performance testing system for single-phase fluid loops used in space, employing the universal performance testing system for single-phase fluid loops used in space as described in any one of claims 1-7, characterized in that, The method includes adjusting the pressure of the gas source (33) by adjusting the switch of the pressure reducing valve (34), thereby achieving the balance of pressure at both ends of the liquid reservoir; By adjusting the opening and closing of control valve II (10), control valve VI (23), and control valve X (50), it is possible to determine whether the heat sink (9), phase change heat exchanger (28), and drive pump (45) to be tested are connected to the main circuit system for performance testing and test combination status. By adjusting the temperature of the temperature control unit (20), the heat exchange rate with the plate heat exchanger (18) can be realized, thereby quickly adjusting the temperature of the working fluid in the system. By adjusting the opening and closing of control valve Ⅲ (15), the plate heat exchanger (18) can be controlled to be connected to the system, thereby controlling whether the temperature control unit (20) is needed for auxiliary heat exchange; By adjusting the temperature control valve (17), the flow rate of the working fluid entering the plate heat exchanger (18) can be adjusted, thereby precisely regulating the temperature of the working fluid after heat exchange. Quick disconnectors I (5) and II (14) can connect the heat sink assembly (9) to the test system; quick disconnectors VII (42) and VIII (48) can connect the drive pump assembly (45) to the test system; connecting quick disconnectors V (24) and VI (32) can connect the phase change heat exchanger assembly (28) to the test system. By connecting an external filling device and adjusting the filling and draining valve (39), the system can achieve vacuuming and working fluid filling functions; The amount of working fluid added can be adjusted by adjusting the opening and closing of the control valve VII (36) at the bottom of the reservoir.

9. A test method for a universal performance testing system for single-phase fluid loops used in space, employing the universal performance testing system for single-phase fluid loops used in space as described in any one of claims 1-7, characterized in that the steps include... include: Step S1: Build a generalized performance test platform for single-phase fluid loops for space applications, including control valve I (1), built-in drive pump (2), flow meter (3), flow valve (4), quick disconnector I (5), quick disconnector II (14), control valve III (15), control valve IV (16), temperature control valve (17), plate heat exchanger (18), quick disconnector III (19), temperature control unit (20), quick disconnector IV (21), valve VI (23), and quick disconnector. V (24), quick disconnector VI (32), gas source (33), pressure reducing valve (34), liquid reservoir (35), control valve VII (36), control valve VIII (37), supply and exhaust valve (39), filter (40), thermocouple V (41), quick disconnector VII (42), quick disconnector VIII (48), thermocouple VI (49), control valve X (50), control valve XI (51) are built up as a general platform and the quick disconnector is used as the external interface; Step S2: Connect the bellows V (43), pressure gauge V (44), drive pump (45), pressure gauge VI (46), and bellows VI (47) in series as a drive pump assembly, and connect it to the general performance test platform for single-phase fluid circuits for space use through quick disconnectors VII (42) and VIII (48). Step S3: Connect the bellows III (25), pressure gauge III (26), thermocouple III (27), phase change heat exchanger (28), thermocouple IV (29), pressure gauge IV (30), and bellows IV (31) in series as a phase change heat exchanger assembly, and then connect it to the general performance test platform for single-phase fluid loops in space via quick disconnector V (24) and quick disconnector VI (32); Step S4: Connect the bellows I (6), pressure gauge I (7), thermocouple I (8), heat sink (9), control valve II (10), thermocouple II (11), pressure gauge II (12), and bellows II (13) in series as a heat sink assembly, and connect it to the general performance test platform for single-phase fluid circuits for space use through quick disconnector I (5) and quick disconnector II (14); Step S5: Adjust all valves to the closed state, and open control valve XI (51), control valve Ⅲ (15), and control valve Ⅳ (16) to connect the main road; Step S6: Open the filler valve (39) and connect the vacuum filling equipment. Vacuum the system to below 1 Pa using the vacuum filling equipment, then add the predetermined amount of working fluid. Adjust the pressure reducing valve (34) to 0.4 MPa on the gas side of the reservoir until the gas and liquid sides are balanced. Close the filler valve (39) and disconnect the vacuum filling equipment. Step S7: Start the heat sink (9), set its heat consumption to 500W, and set the temperature control unit (20) to a constant temperature of 2℃; Step S8: Read the temperatures of thermocouple I (8), thermocouple II (11), thermocouple III (27), and thermocouple IV (29), and read the flow rate of the flow meter (3); start the drive pump (45), and adjust the speed of the drive pump (45) and the temperature control valve (17) in sequence to adjust the flow rate and temperature boundary to control the flow rate to 2-8 L / min and the heat sink inlet temperature to 7℃-14℃ in sequence; Step S9: After the system temperature stabilizes, record the temperature, pressure, flow rate, drive pump speed, voltage, and current of the measured system during the process, as the control strategy for the fluid loop system under this operating condition; Step S10: Modify the heat sink (9) heat consumption to 1000W; Repeat steps S8 and S9 as the control strategy for the fluid loop system under this operating condition.

10. A test method for a universal performance testing system for single-phase fluid loops used in space, employing the universal performance testing system for single-phase fluid loops used in space as described in any one of claims 1-7, characterized in that the steps include... include: Step S1: Build a generalized performance test platform for single-phase fluid loops for space applications, including control valve I (1), built-in drive pump (2), flow meter (3), flow valve (4), quick disconnector I (5), quick disconnector II (14), control valve III (15), control valve IV (16), temperature control valve (17), plate heat exchanger (18), quick disconnector III (19), temperature control unit (20), quick disconnector IV (21), control valve VI (23), and quick disconnector... The following components are assembled: valve V (24), quick disconnector VI (32), gas source (33), pressure reducing valve (34), liquid reservoir (35), control valve VII (36), control valve VIII (37), supply and exhaust valve (39), filter (40), thermocouple V (41), quick disconnector VII (42), quick disconnector VIII (48), thermocouple VI (49), control valve X (50), and control valve XI (51) to form a universal platform and use the quick disconnector as the external interface. Step S2: Connect the bellows V (43), pressure gauge V (44), drive pump (45), pressure gauge VI (46), and bellows VI (47) in series as a drive pump assembly, and connect it to the general performance test platform for single-phase fluid circuits for space use through quick disconnectors VII (42) and VIII (48). Step S3: Connect the bellows III (25), pressure gauge III (26), thermocouple III (27), phase change heat exchanger (28), thermocouple IV (29), pressure gauge IV (30), and bellows IV (31) in series as a phase change heat exchanger assembly, and then connect it to the general performance test platform for single-phase fluid loops in space via quick disconnector V (24) and quick disconnector VI (32); Step S4: Adjust all valves to the closed state, and open control valve XI (51), control valve II (10), and control valve IV (16) to connect the main road; Step S5: Open the filler valve (39) and connect the vacuum filling equipment. Vacuum the system to below 1 Pa using the vacuum filling equipment, then add the predetermined amount of working fluid. Adjust the pressure reducing valve (34) to 0.4 MPa on the gas side of the reservoir until the gas and liquid sides are balanced. Close the filler valve (39) and disconnect the vacuum filling equipment. Step S7: Start the temperature control unit (20) and set the temperature control unit (20) to a constant temperature of 60℃; Step S8: Start the drive pump (45), read the temperature values ​​of thermocouple III (27) and thermocouple IV (29), and adjust the temperature control valve (17) to control the inlet temperature of the phase change heat exchanger (28) to 25-40℃; Step S9: After the system temperature stabilizes, read the temperature values ​​of thermocouple III (27) and thermocouple IV (29) and substitute them into the calculation to obtain the heat collection amount of the phase change heat exchanger (28) under different operating conditions.

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