A heat exchanger thermodynamic performance and alternating cycle test bench

Abstract

This utility model discloses a heat exchanger thermodynamic performance and alternating cycle test bench, belonging to the field of heat exchanger testing devices. It includes a platform with a support fixedly installed below it. A heat source mechanism is mounted on the platform, and a flow guiding mechanism is installed on the heat source mechanism. The heat source mechanism guides fluid into the heat exchanger under test through the flow guiding mechanism, which also changes the flow path direction of the fluid. Through the control components in the flow guiding mechanism, this test bench can quickly switch between co-current and counter-current states of high-temperature fluid in the heat exchanger under test according to testing requirements. Unlike traditional test benches, it eliminates the need for cumbersome joint disassembly and assembly, greatly saving test preparation time and significantly improving overall testing efficiency. It is particularly suitable for scenarios requiring extensive comparison of the performance of different types of heat exchangers under two flow states, effectively shortening the research and development cycle.

Description

Technical Field

[0001] This utility model relates to the technical field of heat exchanger testing devices, and in particular to a heat exchanger thermodynamic performance and alternating cycle test bench. Background Technology

[0002] In the research and development and performance testing of heat exchangers, accurately evaluating their thermodynamic performance and heat exchange efficiency under different flow paths is crucial. Traditional heat exchanger performance testing benches typically only allow testing under a single flow path (co-current or counter-current). When it is necessary to test the performance of the heat exchanger under another flow path, the joints connecting the heat exchanger and the test bench must be manually disassembled and reassembled to change the direction of fluid flow.

[0003] This manual disassembly and assembly method has many drawbacks. Firstly, frequent disassembly and assembly not only consumes a significant amount of time, extending the testing cycle and reducing overall testing efficiency, but this inefficiency is particularly pronounced in scenarios requiring comparisons of the performance of numerous different types of heat exchangers under co-current and counter-current conditions. Secondly, improper operation during manual disassembly and assembly can easily lead to inadequate joint sealing, causing fluid leaks. This not only affects the accuracy of test results but may also damage the test equipment, increasing maintenance costs and safety hazards.

[0004] Therefore, developing a heat exchanger thermodynamic performance and alternating cycle test bench that can quickly and conveniently switch between co-current and counter-current states of fluid within the heat exchanger without requiring reassembly and disassembly of joints has become a key issue that urgently needs to be addressed in the field of heat exchanger performance testing. Utility Model Content

[0005] The purpose of this invention is to address the problem that traditional heat exchanger performance testing benches in the prior art can typically only perform tests under a single flow path. When it is necessary to test the performance of the heat exchanger under another flow path, it is necessary to manually disassemble and reassemble the joints connecting the heat exchanger and the test bench pipeline to change the flow direction of the fluid. Therefore, this invention proposes a heat exchanger thermodynamic performance and alternating cycle testing bench.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A heat exchanger thermodynamic performance and alternating cycle test bench includes a platform, a support fixedly installed below the platform, a heat source mechanism on the platform, and a flow guiding mechanism installed on the heat source mechanism. The heat source mechanism guides fluid into the heat exchanger under test through the flow guiding mechanism, and the flow guiding mechanism is used to change the flow path direction of the fluid.

[0008] Preferably, the heat source mechanism includes a container fixedly installed on a platform, a heating element fixedly installed inside the container for heating the fluid inside the container, a suction pump fixedly installed on the container, the inlet pipe of the suction pump communicating with the inner cavity of the container, the outlet end of the suction pump communicating with and fixedly installed with a drain pipe, and a reflux port opened on the container communicating with the inner cavity of the container.

[0009] Preferably, the flow guiding mechanism includes a horizontal tube fixedly installed on the container, the middle section of the horizontal tube is sealed, both ends of the horizontal tube are connected and fixedly installed with flexible hoses, the ends of the flexible hoses are detachably connected to a connector, the connector is connected to the flexible hose, the connector is connected to the heat exchanger to be tested, a flow guiding pipe is fixedly installed on the horizontal tube, the flow guiding pipe is set in an "H" shape, the two upper ports of the flow guiding pipe are respectively connected to the two ends of the horizontal tube, the two lower ports of the flow guiding pipe extend into the return port, the drain pipe is connected to the flow guiding pipe, and the flow guiding mechanism also includes a control component for controlling the opening and closing of the flow guiding pipe.

[0010] Preferably, flanges are fixedly installed on both the end of the hose and the connector, and the hose and connector are connected by screws.

[0011] Preferably, the control component includes a first sealing core and a second sealing core disposed in the middle section of the guide pipe. The first and second sealing cores are spaced apart on both sides of the drain pipe. Both the first and second sealing cores have through-holes. A first support plate is fixedly installed on the guide pipe. Vertical shafts are fixedly installed on both the first and second sealing cores. The two vertical shafts are rotatably mounted on the first support plate. Driven wheels are fixedly installed at the bottom of both vertical shafts. A second support plate is fixedly installed on the container. An electric telescopic rod is fixedly installed on the second support plate. A movable frame is fixedly installed at the output end of the electric telescopic rod. A rack portion is provided on both sides of the movable frame. The rack portion meshes with the driven wheel on the same side.

[0012] Preferably, the control component further includes a third sealing core and a fourth sealing core disposed at both ends below the flow guide pipe. Each of the third and fourth sealing cores has a through-hole drainage channel. A connecting shaft is rotatably mounted on the second support plate. Both ends of the connecting shaft are fixedly connected to the third and fourth sealing cores on both sides. A servo motor is fixedly mounted on the container. The output shaft of the servo motor is fixedly connected to the fourth sealing core. The output shaft of the servo motor and the connecting shaft are collinear.

[0013] Preferably, the container is equipped with a temperature measuring device for measuring the temperature of the fluid inside the container.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This test bench, through the control components in its flow guiding mechanism, can quickly switch between co-current and counter-current states of high-temperature fluid within the heat exchanger under test, according to testing requirements. Unlike traditional test benches, it eliminates the need for cumbersome joint disassembly and assembly, significantly saving test preparation time and substantially improving overall testing efficiency. It is particularly suitable for scenarios requiring extensive comparisons of the performance of different types of heat exchangers under two flow states, effectively shortening the research and development cycle. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a heat exchanger thermodynamic performance and alternating cycle test bench proposed in this utility model;

[0017] Figure 2 This invention provides an enlarged schematic diagram of a portion of the structure of the container in a heat exchanger thermodynamic performance and alternating cycle test rig. Figure 1 ;

[0018] Figure 3 This invention provides an enlarged schematic diagram of a portion of the structure of the container in a heat exchanger thermodynamic performance and alternating cycle test rig. Figure 2 ;

[0019] Figure 4 This utility model proposes a heat exchanger thermodynamic performance and alternating cycle test bench. Figure 2 Enlarged diagram of point A in the diagram;

[0020] Figure 5 This is an enlarged schematic diagram of a portion of the structure of the horizontal tube and the flow guide pipe in a heat exchanger thermodynamic performance and alternating cycle test bench proposed in this utility model.

[0021] Figure 6 This is an exploded view of the flow guide pipe and control components in the cut-out state of a heat exchanger thermodynamic performance and alternating cycle test bench proposed in this utility model.

[0022] In the diagram: 1. Platform; 2. Support; 3. Heat source mechanism; 4. Flow guiding mechanism; 5. Container; 6. Heating element; 7. Suction pump; 8. Drain pipe; 9. Return port; 10. Horizontal pipe; 11. Hose; 12. Connector; 13. Flow guiding pipeline; 14. First sealing core; 15. Second sealing core; 16. First support plate; 17. Vertical shaft; 18. Driven wheel; 19. Second support plate; 20. Electric telescopic rod; 21. Movable frame; 22. Rack section; 23. Third sealing core; 24. Fourth sealing core; 25. Connecting shaft; 26. Servo motor; 27. Heat exchanger. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] Reference Figure 1-6 A heat exchanger thermodynamic performance and alternating cycle test bench includes a platform 1, a support 2 fixedly installed below the platform 1, a heat source mechanism 3 set on the platform 1, and a flow guiding mechanism 4 installed on the heat source mechanism 3. The heat source mechanism 3 guides high-temperature fluid into the heat exchanger 27 under test through the flow guiding mechanism 4, and the flow guiding mechanism 4 is used to change the flow path direction of the fluid.

[0026] The heat source mechanism 3 includes a container 5 fixedly installed on the platform 1. A heating element 6 is fixedly installed inside the container 5. The heating element 6 is used to heat the fluid inside the container 5. A suction pump 7 is fixedly installed on the container 5. The inlet pipe of the suction pump 7 is connected to the inner cavity of the container 5. The outlet end of the suction pump 7 is connected to and fixedly installed with a drain pipe 8. A return port 9 is opened on the container 5 and is connected to the inner cavity of the container 5.

[0027] The flow guiding mechanism 4 includes a horizontal pipe 10 fixedly installed on the container 5. The middle section of the horizontal pipe 10 is sealed. Both ends of the horizontal pipe 10 are connected and fixedly installed with hoses 11. The ends of the hoses 11 are detachably connected to connectors 12. Connectors 12 are connected to hoses 11 and heat exchangers 27 under test. A flow guiding pipe 13 is fixedly installed on the horizontal pipe 10. The flow guiding pipe 13 is set in an "H" shape. The two upper ports of the flow guiding pipe 13 are connected to both ends of the horizontal pipe 10, and the two lower ports of the flow guiding pipe 13 extend into the return port 9. The drain pipe 8 is connected to the flow guiding pipe 13. The flow guiding mechanism 4 also includes a control component for controlling the opening and closing of the flow guiding pipe 13.

[0028] The control assembly includes a first sealing core 14 and a second sealing core 15 disposed in the middle section of the guide pipe 13. The first sealing core 14 and the second sealing core 15 are spaced apart on both sides of the drain pipe 8. Both the first sealing core 14 and the second sealing core 15 have through-hole drainage channels. A first support plate 16 is fixedly installed on the guide pipe 13. Vertical shafts 17 are fixedly installed on both the first sealing core 14 and the second sealing core 15. The two vertical shafts 17 are rotatably mounted on the first support plate 16. Driven wheels 18 are fixedly installed at the bottom of both vertical shafts 17. A second support plate 19 is fixedly installed on the container 5. An electric telescopic rod 20 is fixedly installed on the second support plate 19. A movable frame 21 is fixedly installed at the output end of the electric telescopic rod 20. A rack portion 22 is provided on both sides of the movable frame 21. The rack portion 22 meshes with the driven wheel 18 on the same side.

[0029] The control assembly also includes a third sealing core 23 and a fourth sealing core 24 located at both ends below the flow guide pipe 13. Both the third sealing core 23 and the fourth sealing core 24 have through-hole drainage channels. A connecting shaft 25 is rotatably mounted on the second support plate 19. Both ends of the connecting shaft 25 are fixedly connected to the third sealing core 23 and the fourth sealing core 24 on both sides. A servo motor 26 is fixedly mounted on the container 5. The output shaft of the servo motor 26 is fixedly connected to the fourth sealing core 24. The output shaft of the servo motor 26 and the connecting shaft 25 are collinear.

[0030] Fluid is injected into container 5, and the fluid inside container 5 is heated by heating element 6 fixedly installed inside container 5, making it a high-temperature fluid.

[0031] The suction pump 7, which is fixedly installed on the container 5, starts, and its inlet pipe draws the heated high-temperature fluid from the inner cavity of the container 5. Then, the high-temperature fluid is discharged through the drain pipe 8 and introduced into the guide pipe 13.

[0032] Fluid flow direction is controlled by the control component to achieve switching between co-current and counter-current flow. By controlling the opening and closing of different parts of the guide pipe 13 by the control component, the path of the high-temperature fluid entering the heat exchanger 27 under test can be changed, thereby achieving rapid switching between co-current and counter-current flow states.

[0033] Downstream:

[0034] like Figure 6As shown, the first sealing core 14 blocks the flow guide pipe 13, and the flow guide pipe 13 is blocked at this point. The drainage channel on the second sealing core 15 is connected to the flow guide pipe 13, and the flow guide pipe 13 is open at this point. The drainage channel on the third sealing core 23 is connected to the flow guide pipe 13, and the lower port of the flow guide pipe 13 is open at this point. The fourth sealing core 24 blocks the flow guide pipe 13, and the flow guide pipe 13 is blocked at this point. The high-temperature fluid entering the guide pipe 13 through the drain pipe 8 flows through the drain hole on the second sealing core 15, and then flows into the inner cavity of one end of the horizontal pipe 10 through the guide pipe 13. After that, it enters the inlet of the heat exchanger 27 through the hose 11 on one side. The high-temperature fluid flowing through the heat exchanger 27 is discharged to the hose 11 on the other side through the drain port on the heat exchanger 27, and then enters the guide pipe 13 through the inner cavity of the other end of the horizontal pipe 10. After that, it flows through the drain hole on the third sealing core 23, and then flows back to the return port 9 from the lower port of the guide pipe 13, thus returning to the container 5, forming a circulation of high-temperature fluid.

[0035] In reverse flow state:

[0036] The electric telescopic rod 20 drives the movable frame 21 to move, and the rack and pinion section 22 drives the driven wheel 18 to rotate, thereby causing the vertical shafts 17 on both sides to rotate synchronously but in opposite directions, driving the first sealing core 14 and the second sealing core 15 to rotate 90 degrees in opposite directions. By controlling the orientation of the drain channels on the first sealing core 14 and the second sealing core 15, the direction of the high-temperature fluid discharged from the drain pipe 8 can be controlled to be controlled to enter the left or right side of the guide pipe 13. Specifically, the drain channel on the first sealing core 14 is connected to the guide pipe 13, while the second sealing core 15 blocks the guide pipe 13.

[0037] The servo motor 26 is then restarted, driving the fourth sealing core 24 to rotate, and simultaneously driving the third sealing core 23 to rotate via the connecting shaft 25. By controlling the orientation of the drain channels on the third sealing core 23 and the fourth sealing core 24, the left or right port of the lower part of the guide pipe 13 can be controlled to connect with the return port 9, allowing the fluid flowing out of the heat exchanger under test 27 to return to the container 5 through the corresponding port. Specifically, the third sealing core 23 blocks the lower port of the guide pipe 13, and the drain channel on the fourth sealing core 24 connects to the guide pipe 13.

[0038] By controlling the opening and closing of different parts of the flow guide pipe 13, the high-temperature fluid is drawn from the container 5, enters the flow guide pipe 13 through the drain pipe 8, then enters the heat exchanger under test 27 through the horizontal pipe 10 and the flexible hose 11, and then flows out of the heat exchanger under test 27, returning to the container 5 through the corresponding port below the flow guide pipe 13 and the return port 9, forming a circulation. Furthermore, the co-current and counter-current states of the high-temperature fluid in the heat exchanger under test 27 can be quickly switched as needed to verify the impact of different flow paths on heat exchange efficiency. There is no need to reassemble or disassemble the connector 12, effectively improving testing efficiency.

[0039] After the high-temperature fluid flows inside the heat exchanger 27 under test, the temperature of the heat exchanger 27 is measured by a temperature measuring device.

[0040] Based on Example 1, Example 2:

[0041] Flanges are fixedly installed on both the end of the hose 11 and the connector 12, and the hose 11 and the connector 12 are connected by screws. The device is equipped with connectors 12 of different specifications, and the various specifications of connectors 12 can be adapted to heat exchangers 27 of different specifications, thereby improving the applicability of the device.

[0042] A temperature measuring device is installed on container 5 to measure the temperature of the fluid inside container 5. By installing the temperature measuring device, the test personnel can monitor the temperature of the fluid inside container 5 in real time and accurately, providing an important basis for the smooth conduct of the test and data analysis.

[0043] It also includes a multi-channel data acquisition card, control software, and actuators; the data acquisition card is used to synchronously acquire temperature, pressure, flow rate, and vibration data of heat exchanger 27; the control software presets alternating cycle parameters, generates temperature pulse curves and pressure pulse curves, and controls fluid switching and parameter adjustment through the actuators.

[0044] Start the data acquisition system and record initial parameters. Switch between high-temperature and low-temperature fluids according to the preset program, or adjust the pressure / flow rate; monitor the inlet and outlet temperatures, pressures, flow rates, and vibration data of heat exchanger 27 in real time; record key parameters for each cycle (such as peak temperature, trough pressure, and cycle time). After completing the set number of cycles, gradually reduce the temperature / pressure to a safe range; shut down all power equipment and save the test data.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A heat exchanger thermodynamic performance and alternating cycle test bench, comprising a platform (1), wherein a support (2) is fixedly installed below the platform (1), characterized in that, The platform (1) is provided with a heat source mechanism (3), and a flow guiding mechanism (4) is installed on the heat source mechanism (3). The heat source mechanism (3) guides the fluid into the heat exchanger to be tested through the flow guiding mechanism (4), and the flow guiding mechanism (4) is used to change the flow path direction of the fluid.

2. The heat exchanger thermodynamic performance and alternating cycle test bench according to claim 1, characterized in that, The heat source mechanism (3) includes a container (5) fixedly installed on the platform (1). A heating element (6) is fixedly installed inside the container (5). The heating element (6) is used to heat the fluid inside the container (5). A suction pump (7) is fixedly installed on the container (5). The inlet pipe of the suction pump (7) is connected to the inner cavity of the container (5). The outlet of the suction pump (7) is connected to and fixedly installed with a drain pipe (8). A return port (9) is opened on the container (5). The return port (9) is connected to the inner cavity of the container (5).

3. The heat exchanger thermodynamic performance and alternating cycle test bench according to claim 2, characterized in that, The flow guiding mechanism (4) includes a horizontal tube (10) fixedly installed on the container (5). The middle section of the horizontal tube (10) is sealed. Both ends of the horizontal tube (10) are connected and fixedly installed with hoses (11). The ends of the hoses (11) are detachably connected to connectors (12). The connectors (12) are connected to the hoses (11) and to the heat exchanger to be tested. A flow guiding pipe (13) is fixedly installed on the horizontal tube (10). The flow guiding pipe (13) is set in an "H" shape. The two upper ports of the flow guiding pipe (13) are connected to both ends of the horizontal tube (10) respectively. The two lower ports of the flow guiding pipe (13) extend into the return port (9). The drain pipe (8) is connected to the flow guiding pipe (13). The flow guiding mechanism (4) also includes a control component for controlling the opening and closing of the flow guiding pipe (13).

4. The heat exchanger thermodynamic performance and alternating cycle test bench according to claim 3, characterized in that, Flanges are fixedly installed on both the end of the hose (11) and the connector (12), and the hose (11) and the connector (12) are connected by screws.

5. The heat exchanger thermodynamic performance and alternating cycle test bench according to claim 3, characterized in that, The control assembly includes a first sealing core (14) and a second sealing core (15) disposed in the middle section of the guide pipe (13). The first sealing core (14) and the second sealing core (15) are spaced apart on both sides of the drain pipe (8). Both the first sealing core (14) and the second sealing core (15) have through-hole drainage channels. A first support plate (16) is fixedly installed on the guide pipe (13). Vertical shafts (17) are fixedly installed on both the first sealing core (14) and the second sealing core (15). The vertical shaft (17) is rotatably mounted on the first support plate (16). Both vertical shafts (17) are fixedly mounted with driven wheels (18) at their bottoms. The container (5) is fixedly mounted with a second support plate (19). An electric telescopic rod (20) is fixedly mounted on the second support plate (19). A movable frame (21) is fixedly mounted at the output end of the electric telescopic rod (20). Both sides of the movable frame (21) are provided with racks (22), and the racks (22) mesh with the driven wheels (18) on the same side.

6. The heat exchanger thermodynamic performance and alternating cycle test bench according to claim 5, characterized in that, The control component also includes a third sealing core (23) and a fourth sealing core (24) located at both ends below the flow guide pipe (13). Both the third sealing core (23) and the fourth sealing core (24) have through-hole drainage channels. A connecting shaft (25) is rotatably mounted on the second support plate (19). Both ends of the connecting shaft (25) are fixedly connected to the third sealing core (23) and the fourth sealing core (24) on both sides. A servo motor (26) is fixedly mounted on the container (5). The output shaft of the servo motor (26) is fixedly connected to the fourth sealing core (24). The output shaft of the servo motor (26) and the connecting shaft (25) are collinear.

7. The heat exchanger thermodynamic performance and alternating cycle test bench according to claim 2, characterized in that, The container (5) is equipped with a temperature measuring device for measuring the temperature of the fluid inside the container (5).

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