Low temperature flammable liquid heat exchanger test system
By designing a test system for low-temperature flammable liquid heat exchangers, and using coolers and heat exchangers to simulate high-altitude low-temperature conditions, the problem of existing test systems being unable to accurately evaluate heat exchanger performance is solved, thus improving test accuracy and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANXI CLEAN ENERGY RES INST OF TSINGHUA UNIV
- Filing Date
- 2025-07-11
- Publication Date
- 2026-07-21
AI Technical Summary
Existing testing systems are unable to simulate the performance of heat exchangers in aircraft under high-altitude, low-temperature, and high-pressure conditions, and pose safety hazards.
A test system for a low-temperature flammable liquid heat exchanger was designed, including a storage tank, a cooler, a heat exchanger, and a heating flow path. The cooler pre-cools the flammable liquid, and the heat exchanger simulates high-altitude low-temperature conditions. Monitoring components and safety valves are used to ensure system safety.
It improves the accuracy and safety of heat exchanger performance testing, reduces safety hazards in the testing system, and enables accurate simulation of aircraft under high-altitude, low-temperature, and high-pressure conditions.
Smart Images
Figure CN224535437U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat exchanger performance testing technology, and in particular to a testing system for a low-temperature flammable liquid heat exchanger. Background Technology
[0002] The ambient temperature at high altitudes ranges from -50 to -60 degrees Celsius. Aircraft fuel needs to be preheated to a certain temperature before entering the combustion chamber, and lubricating oil also needs to be maintained at a certain temperature to ensure lubrication. Therefore, the thermal management system of an aircraft often includes heat exchangers that heat flammable media. Thus, performance testing of these heat exchangers is crucial. Currently, existing testing systems typically test heat exchangers at room temperature. This results in the flammable media (such as fuel or lubricating oil) already being close to room temperature before heat exchange. This means the testing system cannot accurately simulate the heat exchange conditions of an aircraft under high-altitude, low-temperature, and high-pressure conditions, affecting the effectiveness of heat exchanger performance testing. Furthermore, as the temperature of the flammable media continues to rise (e.g., approaching or exceeding its flash point), the safety risks of the entire testing system also increase, indicating room for improvement. Utility Model Content
[0003] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a low-temperature flammable liquid heat exchanger testing system that provides accurate results for heat exchanger performance testing, improves the effectiveness of heat exchanger performance testing, and minimizes safety hazards.
[0004] A low-temperature flammable liquid heat exchanger testing system according to an embodiment of the present invention includes: a first storage tank for storing flammable liquid, the first storage tank having a first drain port and a first return port; a cooler for cooling the flammable liquid, the cooler having a cooling channel; a first drive pump, the first drive pump being connected to the first drain port and one end of the cooling channel, for conveying the flammable liquid in the first storage tank to the cooler; a heat exchanger, the heat exchanger having a first heat exchange channel and a second heat exchange channel for mutual heat exchange, one end of the first heat exchange channel being connected to the other end of the cooling channel, and the other end being connected to the first return port; a heating flow path, the two ends of the heating flow path being connected to the two ends of the second heat exchange channel to form a heating circuit with a heat exchange medium flowing through it, for heating the flammable liquid flowing through the first heat exchange channel; and a monitoring component for monitoring the thermal parameters of the flammable liquid flowing through the first heat exchange channel to calculate the heat exchange power.
[0005] According to the embodiment of the present invention, the low-temperature flammable liquid heat exchanger testing system, by setting a cooler that can connect the first storage tank and the heat exchanger, can cool the flammable liquid before it enters the heat exchanger, and can realize the simulation of the flammable liquid under the low temperature conditions of the aircraft at high altitude. Thus, it can realize the simulation of the fuel heat exchange conditions of the aircraft under the conditions of high altitude, low temperature and high pressure, which can improve the accuracy of the heat exchanger performance test results and improve the effect of the heat exchanger performance test.
[0006] According to some embodiments of the present invention, the monitoring component further includes: a first monitoring element for monitoring the temperature and pressure of the flammable liquid at one end of the first heat exchange channel; a second monitoring element for monitoring the temperature and pressure of the flammable liquid at the other end of the first heat exchange channel; and a first flow meter for monitoring the flow rate of the flammable liquid through the first heat exchange channel.
[0007] In some embodiments, the cryogenic flammable liquid heat exchanger testing system further includes: a first flow path, a second flow path, and a third flow path, wherein one end of the first flow path is connected to the first drain port, the other end of the first flow path is connected to one end of the cooling channel, the other end of the cooling channel is connected to one end of the second flow path, the other end of the second flow path is connected to one end of the first heat exchange channel, the other end of the first heat exchange channel is connected to one end of the third flow path, and the other end of the third flow path is connected to the first return port; wherein, the first drive pump is disposed in the first flow path, the first monitoring element and the first flow meter are disposed in the second flow path, and the first monitoring element is adjacent to the first end of the first heat exchange channel, and the second monitoring element is disposed in the third flow path and adjacent to the other end of the first heat exchange channel.
[0008] In some embodiments, the cryogenic flammable liquid heat exchanger testing system further includes: a first safety valve, which is connected to the first flow path and is located downstream of the first drive pump for depressurizing the first flow path.
[0009] According to some embodiments of the present invention, the low-temperature flammable liquid heat exchanger testing system further includes: a first redundant heat exchanger, which is connected between the other end of the first heat exchange channel and the first return port, for cooling the flammable liquid flowing out of the first heat exchange channel.
[0010] According to some embodiments of the present invention, the monitoring component is also used to monitor the thermal parameters of the heat exchange medium flowing through the second heat exchange channel in order to calculate the heat exchange power.
[0011] In some embodiments, the monitoring component further includes: a third monitoring element for monitoring the temperature and pressure of the heat exchange medium at one end of the second heat exchange channel; a fourth monitoring element for monitoring the temperature and pressure of the heat exchange medium at the other end of the second heat exchange channel; and a second flow meter for monitoring the flow rate of the heat exchange medium through the second heat exchange channel.
[0012] According to some embodiments of the present invention, the heating flow path includes: a second storage tank for storing a heat exchange medium, the second storage tank having a second drain port and a second return port, the second return port being connected to one end of the second heat exchange flow path; a heater for heating the heat exchange medium, the heater having a heating flow path, one end of the heating flow path being connected to the other end of the second heat exchange flow path; and a second drive pump connected between the second drain port and the other end of the heating flow path, for conveying the heat exchange medium in the second storage tank to the heater.
[0013] In some embodiments, the heating flow path further includes: a fourth flow path, a fifth flow path, and a sixth flow path, one end of the fourth flow path being connected to the second return port, the other end of the fourth flow path being connected to one end of the second heat exchange channel, one end of the fifth flow path being connected to one end of the heating channel, the other end of the fifth flow path being connected to the other end of the second heat exchange channel, one end of the sixth flow path being connected to the other end of the heating channel, and the other end of the sixth flow path being connected to the second drain port, and the second drive pump being disposed in the sixth flow path; wherein, the monitoring component further includes: a third monitoring element, the third monitoring element being disposed in the fourth flow path, for monitoring the temperature and pressure of the heat exchange medium at one end of the second heat exchange channel; a fourth monitoring element, the fourth monitoring element being disposed in the fifth flow path, for monitoring the temperature and pressure of the heat exchange medium at the other end of the second heat exchange channel; and a second flow meter, the second flow meter being disposed in the sixth flow path and adjacent to the second heat exchange channel, for monitoring the flow rate of the heat exchange medium flowing through the second heat exchange channel.
[0014] In some embodiments, the cryogenic flammable liquid heat exchanger testing system further includes: a second safety valve, which is connected to the sixth flow path and is located downstream of the second drive pump for depressurizing the sixth flow path.
[0015] In some embodiments, the low-temperature flammable liquid heat exchanger testing system further includes: a second redundant heat exchanger, which is connected between one end of the second heat exchange channel and the second return port, for cooling the heat exchange medium flowing out of the second heat exchange channel.
[0016] In some embodiments, the low-temperature flammable liquid heat exchanger testing system further includes: a temperature monitoring device, which is used to monitor the temperature of the flammable liquid between the first return port and the first heat exchange channel; wherein the temperature monitoring device is interlocked with the power supplies of the first drive pump and the heater respectively, and when the temperature monitoring device detects that the temperature of the flammable liquid between the first return port and the first heat exchange channel is greater than or equal to T1-10℃, the testing system controls the first drive pump and the heater to stop working, wherein T1 is the flash point of the flammable liquid.
[0017] According to some embodiments of the present invention, the first storage tank also has a pressure relief port; the low-temperature flammable liquid heat exchanger testing system further includes: a liquid seal tank, which is connected to the pressure relief port and is used to contain a portion of flammable liquid to seal the pressure relief port; a pressure relief flow path, one end of which is connected to the liquid seal tank and the other end of which is connected to the outside; a breather valve and a flame arrester, which are disposed on the pressure relief flow path.
[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0020] Figure 1 This is a schematic diagram of the structure of a low-temperature flammable liquid heat exchanger testing system according to some embodiments of the present invention.
[0021] Figure label:
[0022] Low-temperature flammable liquid heat exchanger testing system 100
[0023] First storage tank 10, first drain port 11, first return port 12, pressure relief port 13; second storage tank 20, second drain port 21, second return port 22.
[0024] Cooler 30, cooling channel 31, heater 40, heating channel 41
[0025] Heat exchanger 50, first heat exchange channel 51, second heat exchange channel 52.
[0026] First safety valve 61, second safety valve 62, first redundant heat exchanger 63, second redundant heat exchanger 64, first drive pump 65, second drive pump 66, back pressure valve 67.
[0027] First monitoring element 71, second monitoring element 72, third monitoring element 73, fourth monitoring element 74, first flow meter 75, second flow meter 76, temperature monitoring element 77.
[0028] First flow path 81, second flow path 82, third flow path 83, fourth flow path 84, fifth flow path 85, sixth flow path 86.
[0029] Liquid seal tank 91, pressure relief flow path 92, breather valve 93, flame arrester 94. Detailed Implementation
[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0031] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0033] The following is for reference. Figure 1 Description of a low-temperature flammable liquid heat exchanger testing system 100 according to an embodiment of the present invention.
[0034] like Figure 1As shown, the low-temperature flammable liquid heat exchanger testing system 100 according to an embodiment of the present invention includes: a first storage tank 10, a cooler 30, a first drive pump 65, a heat exchanger 50, a heating flow path, and a monitoring component. The first storage tank 10 can store flammable liquids (such as fuel oil). The first storage tank 10 may have a first drain port 11 and a first return port 12. The cooler 30 can cool flammable liquids. The cooler 30 may have a cooling flow path 31. The first drive pump 65 can connect the first drain port 11 and one end of the cooling flow path 31. The first drive pump 65 can transport the flammable liquid in the first storage tank 10 to the cooling flow path 31 in the cooler 30 through the first drain port 11, thereby achieving the cooling of the flammable liquid.
[0035] For example, the cooler 30 can cool flammable liquids to -60°C to 50°C. On the one hand, it can simulate the low-temperature operating conditions of flammable liquids at high altitudes in aircraft. On the other hand, it can reduce the temperature of flammable liquids, prevent the temperature of flammable liquids from continuously rising after multiple cycles (such as near or above their flash point), reduce the risk of flammable liquids burning and exploding in the test system 100, reduce the safety hazards of the test system 100, and improve the reliability of the test system 100.
[0036] The heat exchanger 50 may have a first heat exchange channel 51 and a second heat exchange channel 52 that exchange heat with each other. One end of the first heat exchange channel 51 may be connected to the other end of the cooling channel 31, so that the cooled flammable liquid can flow into the first heat exchange channel 51, and the other end of the first heat exchange channel 51 may be connected to the first return port 12. The two ends of the heating channel may be connected to the two ends of the second heat exchange channel 52 respectively to form a heating circuit in which a heat exchange medium (such as supercritical carbon dioxide) flows. When the heat exchange medium flows through the second heat exchange channel 52, it can heat the flammable liquid through the heat exchange between the first heat exchange channel 51 and the second heat exchange channel 52. The heated flammable liquid can be returned to the first storage tank 10 through the first return port 12 to complete the circulation of the flammable liquid.
[0037] During this process, the flammable liquid in the first storage tank 10 needs to be cooled by the cooler 30 before it can be heated by the heat exchanger 50. This can simulate the flammable liquid under the high-altitude and low-temperature conditions of the aircraft, thereby simulating the fuel heat exchange conditions of the aircraft under high-altitude, low-temperature and high-pressure conditions. This can improve the performance test effect of the heat exchanger 50. In addition, the monitoring component can monitor the thermal parameters (such as temperature, pressure and flow rate) of the flammable liquid flowing through the first heat exchange channel 51 to calculate its heat exchange power, which can improve the accuracy of the performance test results of the heat exchanger 50.
[0038] According to the embodiment of the present invention, the low-temperature flammable liquid heat exchanger testing system 100, by setting a cooler 30 that can connect the first storage tank 10 and the heat exchanger 50, can cool the flammable liquid before it enters the heat exchanger 50, and can realize the simulation of the flammable liquid under the high-altitude low-temperature operating conditions of the aircraft. Thus, it can realize the simulation of the operating conditions of the aircraft fuel heat exchange under the high-altitude low-temperature and high-pressure conditions, which can improve the accuracy of the heat exchanger 50 performance test results and improve the performance test effect of the heat exchanger 50.
[0039] like Figure 1 As shown, according to some embodiments of the present invention, the monitoring component may further include a first monitoring element 71, a second monitoring element 72, and a first flow meter 75. The first monitoring element 71 can monitor the temperature and pressure of the flammable liquid at one end of the first heat exchange channel 51, the second monitoring element 72 can monitor the temperature and pressure of the flammable liquid at the other end of the first heat exchange channel 51, and the first flow meter 75 can monitor the flow rate of the flammable liquid through the first heat exchange channel 51.
[0040] Therefore, the operator can calculate the working fluid specific enthalpy at both ends of the first heat exchange channel 51 based on the above monitoring results, and continue to introduce flow rate to calculate the heat absorption power of the flammable liquid in the first heat exchange channel 51. This is beneficial for estimating the heat exchange power of the heat exchanger 50, which can improve the accuracy of the heat exchanger 50 performance test results and improve the performance test effect of the heat exchanger 50.
[0041] The temperature of the flammable liquid at one end of the first heat exchange channel 51 can be t1, which can be limited to the range of -50℃ to -30℃, and the temperature of the flammable liquid at the other end of the first heat exchange channel 51 can be t2, which can be limited to the range of 200℃ to 220℃. The pressure of the flammable liquid at one end of the first heat exchange channel 51 can be p1, which can be limited to the range of 4MPa to 6MPa, and the pressure of the flammable liquid at the other end of the first heat exchange channel 51 can be p2, which can be limited to the range of 4MPa to 6MPa. The flow rate of the flammable liquid flowing through the first heat exchange channel 51 is f1.
[0042] Therefore, the specific enthalpy of the working fluid at one end of the first heat exchange channel 51 can be h1 = h(t1, p1), and the specific enthalpy of the working fluid at the other end of the first heat exchange channel 51 can be h2 = h(t2, p2). The heat absorption power of the flammable liquid in the first heat exchange channel 51 is Q1, Q1 = f1(h2 - h1).
[0043] like Figure 1As shown, in some embodiments, the low-temperature flammable liquid heat exchanger testing system 100 may further include: a first flow path 81, a second flow path 82, and a third flow path 83. One end of the first flow path 81 may be connected to the first drain port 11, and the other end of the first flow path 81 may be connected to one end of the cooling channel 31. The other end of the cooling channel 31 may be connected to one end of the second flow path 82, and the other end of the second flow path 82 may be connected to one end of the first heat exchange channel 51. The other end of the first heat exchange channel 51 may be connected to one end of the third flow path 83, and the other end of the third flow path 83 may be connected to the first return port 12.
[0044] The first drive pump 65 can be installed in the first flow path 81, so that the flammable liquid in the first storage tank 10 can flow back to the first storage tank 10 through the first flow path 81, the second flow path 82 and the third flow path 83 in sequence. The first monitoring element 71 and the first flow meter 75 can both be installed in the second flow path 82, and the first monitoring element 71 can be arranged near one end of the first heat exchange channel 51, so that the first monitoring element 71 can accurately monitor the temperature and pressure of the flammable liquid at one end of the first heat exchange channel 51.
[0045] The second monitoring element 72 can be set in the third flow path 83, and the second monitoring element 72 can be arranged near the other end of the first heat exchange flow channel 51, so that the second monitoring element 72 can accurately monitor the temperature and pressure of the flammable liquid at the other end of the first heat exchange flow channel 51, thereby enabling the monitoring of the thermal parameters of the flammable liquid to calculate the heat exchange power of the heat exchanger 50, which can improve the accuracy of the performance test results of the heat exchanger 50 and improve the effect of the performance test of the heat exchanger 50.
[0046] like Figure 1 As shown, in some embodiments, the low-temperature flammable liquid heat exchanger testing system 100 may further include a first safety valve 61. The first safety valve 61 may be connected to the first flow path 81. The first safety valve 61 may depressurize the first flow path 81 and may be located downstream of the first drive pump 65. This may prevent the pressure in the first flow path 81 from suddenly increasing or exceeding the maximum pressure that its pipe can withstand due to the operation of the first drive pump 65, thereby protecting the first flow path 81, preventing the pipe of the first flow path 81 from being damaged due to the increase in its internal pressure, improving the service life of the first flow path 81, and reducing maintenance costs.
[0047] like Figure 1As shown, according to some embodiments of the present invention, the low-temperature flammable liquid heat exchanger testing system 100 may further include a first redundant heat exchanger 63. The first redundant heat exchanger 63 may be connected between the other end of the first heat exchange channel 51 and the first return port 12. The first redundant heat exchanger 63 may cool the flammable liquid flowing out of the first heat exchange channel 51, so that the cooled flammable liquid flows back to the first storage tank 10. This may reduce the temperature of the flammable liquid when it flows back to the first storage tank 10 through the first return port 12, prevent the temperature of the flammable liquid from continuously rising (such as to be near or above its flash point) after multiple cycles, reduce the risk of flammable liquid burning and exploding in the testing system 100, reduce the safety hazards of the testing system 100, and improve the reliability of the testing system 100.
[0048] like Figure 1 As shown, in some embodiments, the cryogenic flammable liquid heat exchanger test system 100 may further include a back pressure valve 67. The back pressure valve 67 may be set in the third flow path 83, which can simulate the high pressure environment of the flammable liquid upstream of the third flow path 83 and in the first heat exchange channel 51. That is, by setting the back pressure valve 67, the simulation of the flammable liquid under high pressure conditions can be realized, thereby realizing the simulation of the fuel heat exchange condition of the aircraft under high altitude, low temperature and high pressure conditions, which can improve the accuracy of the heat exchanger 50 performance test results and improve the effect of the heat exchanger 50 performance test.
[0049] like Figure 1 As shown, according to some embodiments of the present invention, the monitoring component can also monitor the thermal parameters (such as temperature, pressure and flow rate) of the heat exchange medium flowing through the second heat exchange channel 52 to calculate its heat exchange power. Furthermore, by calculating the heat exchange power of the heat exchange medium flowing through the first heat exchange channel 51 and the second heat exchange channel 52 respectively, the accuracy of the performance test results of the heat exchanger 50 can be improved.
[0050] like Figure 1 As shown, in some embodiments, the monitoring component may further include a third monitoring element 73, a fourth monitoring element 74, and a second flow meter 76. The third monitoring element 73 can monitor the temperature and pressure of the heat exchange medium at one end of the second heat exchange channel 52, the fourth monitoring element 74 can monitor the temperature and pressure of the heat exchange medium at the other end of the second heat exchange channel 52, and the second flow meter 76 can monitor the flow rate of the heat exchange medium flowing through the second heat exchange channel 52.
[0051] Therefore, the operator can calculate the working fluid specific enthalpy at both ends of the second heat exchange channel 52 based on the above monitoring results, and continue to introduce flow rate to calculate the heat absorption power of the heat exchange medium in the second heat exchange channel 52. This is beneficial for estimating the heat exchange power of the heat exchanger 50, which can improve the accuracy of the heat exchanger 50 performance test results and improve the performance test effect of the heat exchanger 50.
[0052] As monitored by the monitoring component, the temperature of the heat exchange medium at one end of the second heat exchange channel 52 can be t3, which can be limited to the range of 35℃ to 40℃. The temperature of the heat exchange medium at the other end of the second heat exchange channel 52 can be t4, which can be limited to the range of 340℃ to 360℃. The pressure of the heat exchange medium at both ends of the second heat exchange channel 51 can be p3, which can be limited to the range of 8MPa to 10MPa. The pressure of the heat exchange medium at the other end of the second heat exchange channel 52 can be p4, which can be limited to the range of 8MPa to 10MPa. The flow rate of the heat exchange medium flowing through the second heat exchange channel 52 is f2.
[0053] Therefore, the specific enthalpy of the heat exchange medium at one end of the second heat exchange channel 52 can be h3 = h(t3, p3), and the specific enthalpy of the heat exchange medium at the other end of the second heat exchange channel 52 can be h4 = h(t4, p4). The heat absorption power of the heat exchange medium in the second heat exchange channel 52 is Q2, Q2 = f2(h4-h3).
[0054] like Figure 1 As shown, according to some embodiments of the present invention, the heating flow path may include a second storage tank 20, a heater 40, and a second drive pump 66. The second storage tank 20 may store a heat exchange medium (such as supercritical carbon dioxide). The second storage tank 20 may have a second drain port 21 and a second return port 22. The second return port 22 may be connected to one end of the second heat exchange channel 52. The heater 40 may heat the heat exchange medium. The heater 40 may have a heating channel 41. One end of the heating channel 41 may be connected to the other end of the second heat exchange channel 52.
[0055] The second drive pump 66 can be connected between the second drain port 21 and the other end of the heating channel 41. The second drive pump 66 can transport the heat exchange medium in the second storage tank 20 to the heating channel 41 in the heater 40 through the second drain port 21, thereby heating the heat exchange medium. As a result, when the heat exchange medium flows through the second heat exchange channel 52, it can heat the flammable liquid through the heat exchange between the first heat exchange channel 51 and the second heat exchange channel 52, and can perform performance testing on the heat exchanger 50.
[0056] like Figure 1As shown, in some embodiments, the heating flow path may further include: a fourth flow path 84, a fifth flow path 85, and a sixth flow path 86. One end of the fourth flow path 84 may be connected to the second return port 22, and the other end of the fourth flow path 84 may be connected to one end of the second heat exchange channel 52. One end of the fifth flow path 85 may be connected to one end of the heating channel 41, and the other end of the fifth flow path 85 may be connected to the other end of the second heat exchange channel 52. One end of the sixth flow path 86 may be connected to the other end of the heating channel 41, and the other end of the sixth flow path 86 may be connected to the second drain port 21.
[0057] The second drive pump 66 can be installed in the sixth flow path 86, so that the heat exchange medium in the second storage tank 20 can flow back to the second storage tank 20 through the sixth flow path 86, the fifth flow path 85 and the fourth flow path 84 in sequence. The third monitoring element 73 can be installed in the fourth flow path 84 and can be arranged near one end of the second heat exchange channel 52, so that the third monitoring element 73 can accurately monitor the temperature and pressure of the flammable liquid at one end of the second heat exchange channel 52.
[0058] The fourth monitoring element 74 can be set in the fifth flow path 85, and the fourth monitoring element 74 can be arranged near the other end of the second heat exchange channel 52, so that the fourth monitoring element 74 can accurately monitor the temperature and pressure of the flammable liquid at the other end of the second heat exchange channel 52. The second flow meter 76 can be set in the sixth flow path 86, and the second flow meter 76 can be arranged near the second heat exchange channel 52, thereby enabling the monitoring of the thermal parameters of the heat exchange medium to calculate the heat exchange power of the heat exchanger 50, which can improve the accuracy of the heat exchanger 50 performance test results and improve the effect of the heat exchanger 50 performance test.
[0059] like Figure 1 As shown, in some embodiments, the low-temperature flammable liquid heat exchanger test system 100 may further include a second safety valve 62. The second safety valve 62 may be connected to the sixth flow path 86. The second safety valve 62 may depressurize the sixth flow path 86 and may be located downstream of the second drive pump 66. This may prevent the pressure in the sixth flow path 86 from suddenly increasing or exceeding the maximum pressure that its pipeline can withstand due to the operation of the second drive pump 66, thereby protecting the sixth flow path 86, preventing the pipeline of the sixth flow path 86 from being damaged due to the increase in its internal pressure, improving the service life of the sixth flow path 86, and reducing maintenance costs.
[0060] like Figure 1As shown, in some embodiments, the low-temperature flammable liquid heat exchanger testing system 100 may further include: a second redundant heat exchanger 64, which can be connected between one end of the second heat exchange channel 52 and the second return port 22. The second redundant heat exchanger 64 can cool the heat exchange medium flowing out of the second heat exchange channel 52, so that the cooled heat exchange medium flows back to the second storage tank 20. This can reduce the temperature of the heat exchange medium when it flows back to the second storage tank 20 through the second return port 22, prevent the temperature of the heat exchange medium from continuously rising after multiple cycles, reduce the safety hazards of the testing system 100, and improve the reliability of the testing system 100.
[0061] like Figure 1 As shown, in some embodiments, the low-temperature flammable liquid heat exchanger test system 100 may further include: a temperature monitoring element 77, which can monitor the temperature of the flammable liquid between the first return port 12 and the first heat exchange channel 51. The temperature monitoring element 77 can be interlocked with the power supply of the first drive pump 65 and the heater 40 respectively. When the temperature monitoring element 77 detects that the temperature of the flammable liquid (flammable liquid returning to the first storage tank 10) between the first return port 12 and the first heat exchange channel 51 is greater than or equal to T1-10℃, the test system 100 can control the first drive pump 65 and the heater 40 to stop working, which can ensure that the temperature of the flammable liquid is constant when it returns to the first storage tank 10.
[0062] Wherein, T1 can be the flash point of the flammable liquid, which can maintain the temperature of the flammable liquid at a level far below its flash point when it flows back to the first storage tank 10. This can prevent the temperature of the flammable liquid from continuously rising (such as to be near or above its flash point) after multiple cycles, reduce the risk of flammable liquid burning and exploding in the test system 100, reduce the safety hazards of the test system 100, and improve the reliability of the test system 100.
[0063] like Figure 1 As shown, according to some embodiments of the present invention, the first storage tank 10 may also have a pressure relief port 13, and the low-temperature flammable liquid heat exchanger testing system 100 may also include a liquid seal tank 91, a pressure relief flow path 92, a breather valve 93, and a flame arrester 94. The liquid seal tank 91 may be connected to the pressure relief port 13. The liquid seal tank 91 may contain a portion of flammable liquid and may achieve a liquid seal on the pressure relief port 13. This may ensure that the gas in the first storage tank 10 is discharged through the pressure relief port 13 to maintain a constant pressure in the first storage tank 10, and may prevent outside air from entering through the pressure relief port 13 to prevent the formation of a dangerous mixture of flammable liquid and air. This may reduce the safety hazards of the testing system 100 and improve the reliability of the testing system 100.
[0064] One end of the pressure relief flow path 92 can be connected to the liquid seal tank 91, and the other end of the pressure relief flow path 92 can be connected to the outside, so that the gas in the first storage tank 10 can be discharged through the pressure relief port 13 to maintain the constant pressure of the first storage tank 10. The flame arrester 94 can be installed on the pressure relief flow path 92 to prevent the external flame from spreading to the first storage tank 10 along the pressure relief flow path 92. The breather valve 93 can be installed on the pressure relief flow path 92 and located downstream of the flame arrester 94, so that the breather valve 93 and the pressure relief flow path 92 cooperate to discharge the excess gas in the first storage tank 10 to maintain its constant pressure, which can reduce the safety hazards of the test system 100 and improve the reliability of the test system 100.
[0065] Other configurations and operations of the low-temperature flammable liquid heat exchanger testing system 100 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here. In the description of the present invention, "first feature" and "second feature" may include one or more of the aforementioned features. The vertical, horizontal, and front-back directions are defined as shown in the figures.
[0066] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features not in direct contact but through another feature between them. Moreover, "above," "over," and "on top" of the second feature include the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.
[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0068] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A testing system for a low-temperature flammable liquid heat exchanger, characterized in that, include: The first storage tank is used to store flammable liquids, and the first storage tank has a first drain port and a first return port; A cooler for cooling flammable liquids, the cooler having cooling channels; A first drive pump, which connects the first drain port and one end of the cooling channel, is used to deliver flammable liquid from the first storage tank to the cooler. A heat exchanger having a first heat exchange channel and a second heat exchange channel that exchange heat with each other, one end of the first heat exchange channel being connected to the other end of the cooling channel, and the other end being connected to the first return port. A heating flow path, wherein the two ends of the heating flow path are connected to the two ends of the second heat exchange channel to form a heating circuit in which a heat exchange medium flows, for heating flammable liquid flowing through the first heat exchange channel; The monitoring component is used to monitor the thermal parameters of the flammable liquid flowing through the first heat exchange channel in order to calculate the heat exchange power.
2. The low-temperature flammable liquid heat exchanger testing system according to claim 1, characterized in that, The monitoring component also includes: The first monitoring element is used to monitor the temperature and pressure of the flammable liquid at one end of the first heat exchange channel; The second monitoring element is used to monitor the temperature and pressure of the flammable liquid at the other end of the first heat exchange channel; The first flow meter is used to monitor the flow rate of flammable liquid through the first heat exchange channel.
3. The low-temperature flammable liquid heat exchanger testing system according to claim 2, characterized in that, Also includes: The system comprises a first flow path, a second flow path, and a third flow path. One end of the first flow path is connected to the first drain port, and the other end of the first flow path is connected to one end of the cooling channel. The other end of the cooling channel is connected to one end of the second flow path, and the other end of the second flow path is connected to one end of the first heat exchange channel. The other end of the first heat exchange channel is connected to one end of the third flow path, and the other end of the third flow path is connected to the first return port. The first drive pump is located in the first flow path, the first monitoring element and the first flow meter are located in the second flow path, and the first monitoring element is located near one end of the first heat exchange channel, while the second monitoring element is located in the third flow path and near the other end of the first heat exchange channel.
4. The low-temperature flammable liquid heat exchanger testing system according to claim 1, characterized in that, Also includes: A first redundant heat exchanger is connected between the other end of the first heat exchange channel and the first return port for cooling flammable liquid flowing out of the first heat exchange channel.
5. The low-temperature flammable liquid heat exchanger testing system according to claim 1, characterized in that, The monitoring component is also used to monitor the thermal parameters of the heat exchange medium flowing through the second heat exchange channel in order to calculate the heat exchange power.
6. The low-temperature flammable liquid heat exchanger testing system according to claim 5, characterized in that, The monitoring component also includes: The third monitoring element is used to monitor the temperature and pressure of the heat exchange medium at one end of the second heat exchange channel; The fourth monitoring element is used to monitor the temperature and pressure of the heat exchange medium at the other end of the second heat exchange channel; The second flow meter is used to monitor the flow rate of the heat exchange medium through the second heat exchange channel.
7. The low-temperature flammable liquid heat exchanger testing system according to claim 1, characterized in that, The heating flow path includes: The second storage tank is used to store the heat exchange medium. The second storage tank has a second drain port and a second return port. The second return port is connected to one end of the second heat exchange channel. A heater for heating a heat exchange medium, the heater having a heating channel, one end of the heating channel being connected to the other end of a second heat exchange channel; The second drive pump, which is connected between the second drain port and the other end of the heating channel, is used to deliver the heat exchange medium in the second storage tank to the heater.
8. The low-temperature flammable liquid heat exchanger testing system according to claim 7, characterized in that, The heating flow path further includes: a fourth flow path, a fifth flow path, and a sixth flow path. One end of the fourth flow path is connected to the second return port, and the other end of the fourth flow path is connected to one end of the second heat exchange channel. One end of the fifth flow path is connected to one end of the heating channel, and the other end of the fifth flow path is connected to the other end of the second heat exchange channel. One end of the sixth flow path is connected to the other end of the heating channel, and the other end of the sixth flow path is connected to the second drain port. The second drive pump is located in the sixth flow path. The monitoring component further includes: The third monitoring element is located in the fourth flow path and is used to monitor the temperature and pressure of the heat exchange medium at one end of the second heat exchange channel. The fourth monitoring element is located in the fifth flow path and is used to monitor the temperature and pressure of the heat exchange medium at the other end of the second heat exchange channel. The second flow meter is located in the sixth flow path and adjacent to the second heat exchange channel, and is used to monitor the flow rate of the heat exchange medium through the second heat exchange channel.
9. The low-temperature flammable liquid heat exchanger testing system according to claim 7, characterized in that, Also includes: A temperature monitoring device, wherein the temperature monitoring device is used to monitor the temperature of the flammable liquid between the first return port and the first heat exchange channel; The temperature monitoring device is interlocked with the power supplies of the first drive pump and the heater. When the temperature monitoring device detects that the temperature of the flammable liquid between the first return port and the first heat exchange channel is greater than or equal to T1-10℃, the test system controls the first drive pump and the heater to stop working, where T1 is the flash point of the flammable liquid.
10. The low-temperature flammable liquid heat exchanger testing system according to any one of claims 1-9, characterized in that, The first storage tank also has a pressure relief port; Also includes: A liquid-sealed container, which is connected to the pressure relief port, is used to contain a portion of flammable liquid to seal the pressure relief port; A pressure relief flow path, one end of which is connected to the liquid seal tank, and the other end is connected to the outside. A breather valve and a flame arrester are provided on the pressure relief flow path.