Seaplane environmental control system heat and humidity characteristic test platform

Abstract

The application discloses a seaplane environmental control system heat exchanger heat and humidity characteristic test platform, and belongs to the technical field of experimental platforms. The outlet of a high-pressure gas source is communicated with a hot side inlet through a first pipeline. A heating device is arranged on the first pipeline, and the heating device is used for heating heat exchange working medium in the first pipeline which passes through the heating device. The outlet of a compressor is communicated with a cold side inlet through a second pipeline. A first nozzle is arranged at the inlet of the compressor and is used for spraying mist to the inlet of the compressor. A second nozzle is arranged at the outlet of the compressor and is used for spraying mist to the second pipeline. The compressor is used for conveying the heat exchange working medium to the heat exchanger through the second pipeline. The heat exchange working medium comprises air and mist. A working medium detection device is used for detecting the physical performance of the heat exchange working medium. The application can consider the high-wet-heat flight environment of a seaplane, simulate high-wet-heat inlet air of a cold side inlet of a heat exchanger by using the wet compression effect of a compressor, and carry out wet working condition testing of the heat exchanger under the high-wet-heat inlet air condition.

Description

Technical Field

[0001] This invention relates to the field of experimental platform technology, and in particular to a test platform for the thermal and humidity characteristics of a heat exchanger in a seaplane environmental control system. Background Technology

[0002] The Environmental Control System (ECS) of a seaplane is crucial for maintaining environmental parameters such as pressure, temperature / humidity, and air quality within the seaplane cabin, creating a normal and comfortable living environment for pilots and passengers. Modern seaplanes typically employ an Air Cycle Refrigeration System (ACS), which mainly consists of three parts: a heat exchanger (including a primary radiator, secondary radiator, regenerator, and condenser), an air circulator (including a compressor, fan, and turbine), and a water separator.

[0003] Compared to conventional high-altitude seaplanes, seaplanes face a high-humidity and high-temperature flight environment, meaning that both the ambient temperature and humidity are significantly higher than in high-altitude flight environments. Their environmental control systems need to operate under these conditions, specifically the high-humidity and high-temperature intake air at the cold side of the secondary radiator. Furthermore, the secondary radiator's cold side in the environmental control system typically requires water spraying at the inlet. Therefore, the heat exchanger operates primarily under hot and humid conditions with a mixed air-water working fluid.

[0004] However, in the current field of heat exchanger research, most studies focus on dry air as the medium, and there is no known design of a test platform for the thermal and humidity characteristics of heat exchangers in seaplane environmental control systems under high humidity and heat intake conditions. Therefore, it is impossible to conduct thermal and humidity characteristic studies on heat exchangers in seaplane environmental control systems under high humidity and heat intake conditions, and it is impossible to more realistically simulate the actual operating conditions of seaplane environmental control systems. Summary of the Invention

[0005] The purpose of this invention is to provide a test platform for the thermal and humidity characteristics of a heat exchanger in a seaplane environmental control system, which can simulate the high humidity and heat intake air at the cold side inlet of the heat exchanger and conduct wet operating condition tests on the heat exchanger.

[0006] This invention provides a test platform for the thermal and humidity characteristics of heat exchangers in the environmental control system of seaplanes.

[0007] Includes: a high-pressure gas source, a heating device, a compressor, a spray device, a working fluid detection device, and a heat exchanger, wherein the heat exchanger includes a hot-side inlet, a cold-side inlet, a hot-side outlet, and a cold-side outlet;

[0008] The spraying device includes a first nozzle and a second nozzle;

[0009] The outlet of the high-pressure gas source is connected to the hot edge inlet through a first pipe; the heating device is installed on the first pipe and is used to heat the heat exchange medium passing through the heating device in the first pipe.

[0010] The compressor outlet is connected to the cold side inlet via a second pipe; the first nozzle is located at the compressor inlet for spraying mist into the compressor inlet; the second nozzle is located at the compressor outlet for spraying mist into the second pipe; the compressor is used to transport the heat exchange medium to the heat exchanger via the second pipe.

[0011] The heat exchange medium includes air and spray, and the medium detection device is used to detect the physical properties of the heat exchange medium.

[0012] Preferably, the working fluid detection device includes a first detection device, a second detection device, a third detection device, a fourth detection device, and a humidity transmitter. The hot-side inlet, the cold-side inlet, the hot-side outlet, the cold-side outlet, and the compressor outlet are all equipped with a first detection device, which is used to detect the temperature and pressure of the heat exchange working fluid. One end of the second detection device is located at the cold-side inlet, and the other end is located at the cold-side outlet. The second detection device detects the pressure difference between the cold-side inlet and the cold-side outlet. The third detection device is located between the second nozzle and the cold-side inlet, and is used to detect the droplet size of the spray. The outlet of the high-pressure gas source and the cold-side outlet are each equipped with a fourth detection device, which is used to detect the mass flow rate of the heat exchange working fluid. The cold-side inlet, the cold-side outlet, and the compressor outlet are all equipped with a humidity transmitter, which is used to detect the humidity of the heat exchange working fluid.

[0013] Preferably, the first detection device is a pressure transmitter and a temperature transmitter.

[0014] Preferably, the second detection device is a differential pressure transmitter.

[0015] Preferably, the third detection device is a laser particle size analyzer, which is disposed between the second nozzle and the cold edge inlet, and is used to detect the particle size of water droplets in the spray ejected from the second nozzle.

[0016] Preferably, the device further includes a computer, which is communicatively connected to the laser particle size analyzer, and the computer is used to receive and process the measurement signals from the laser particle size analyzer.

[0017] Preferably, the fourth detection device includes a first mass flow meter and a second mass flow meter. The first mass flow meter is disposed at the outlet of the high-pressure gas source and is used to detect the mass flow rate of the heat exchange medium at the outlet of the high-pressure gas source. The second mass flow meter is disposed at the cold side outlet and is used to detect the mass flow rate of the heat exchange medium at the cold side outlet.

[0018] Preferably, the compressor also includes a frequency modulator, which is electrically connected to the compressor and is used to supply power to the compressor and control the flow rate delivered by the compressor.

[0019] Preferably, it also includes a pneumatic valve, which is disposed between the first mass flow meter and the high-pressure air source, and the pneumatic valve is used to adjust the flow rate of the compressor delivered by the high-pressure air source.

[0020] Preferably, the spraying device further includes an air compressor and a pressurized water tank. The pressurized water tank includes an air inlet and a water outlet. The outlet of the air compressor is connected to the air inlet of the first nozzle, the air inlet of the first nozzle, and the air inlet of the second nozzle. The water outlet of the pressurized water tank is connected to the water inlet of the first nozzle and the water inlet of the second nozzle.

[0021] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0022] This invention incorporates a spray device and a working fluid detection device into the environmental control system of a seaplane. The spray device sprays mist into the system, simulating the actual flight conditions of a seaplane under humid conditions. The working fluid detection device measures the physical properties of the heat exchange medium, including its temperature, humidity, pressure, pressure difference at different locations, and flow rate. Specific testing items and locations can be set according to the specific experiment. This allows for the use of a spray-infused heat exchange medium in heat exchanger research, enabling the testing and study of the heat transfer and flow characteristics of the heat exchanger under high humidity and heat intake conditions. The ability to consider wet-condition testing of the heat exchanger under high humidity and heat intake conditions provides a more realistic simulation of the operating state of the seaplane's environmental control system. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1A schematic diagram of the thermal and humidity characteristics test platform for the heat exchanger of the seaplane environmental control system provided by the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the environmental monitoring device provided by the present invention.

[0026] Wherein: 1-Control cabinet; 2-Electric heating furnace; 3-First mass flow meter; 4-Pneumatic valve; 5-High-pressure air source; 6-Differential pressure transmitter; 7-Laser particle size analyzer; 8-Second pipeline; 9-Second nozzle; 10-Humidity transmitter; 11-Electric compressor; 12-Frequency tuner; 13-First nozzle; 14-First water flow meter; 15-Conduit; 16-Second water flow meter; 17-Fourth valve; 18-Second valve; 19-First valve; 20-Pressure water tank; 21-Pressure transmitter; 22-Third valve; 23-Air compressor; 24-Fifth valve; 25-Observation window; 26-Computer; 27-Cold side inlet; 28-Hot side outlet; 29-Heat exchanger; 30-Cold side outlet; 31-First mass flow meter; 32-Hot side inlet; 33-Temperature transmitter; 34-First pipeline; 35-Probe. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0028] The purpose of this invention is to provide a test platform for the thermal and humidity characteristics of heat exchangers in the environmental control system of seaplanes, so as to solve the problems existing in the prior art. It can take into account the wet condition test of heat exchangers under high humidity and heat intake conditions, and more realistically simulate the actual operating state of the environmental control system of seaplanes.

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] This embodiment provides a test platform for the thermal and humidity characteristics of the heat exchanger 29 in the environmental control system of a seaplane, such as... Figure 1As shown, the system includes: a high-pressure gas source 5, a heating device, a compressor, a spraying device, a working fluid testing device, and a heat exchanger 29. The heat exchanger 29 includes a hot-side inlet 32, a cold-side inlet 27, a hot-side outlet 28, and a cold-side outlet 30. The spraying device includes a first nozzle 13 and a second nozzle 9. The outlet of the high-pressure gas source 5 is connected to the hot-side inlet 32 ​​through a first pipe 34. The heating device is installed on the first pipe 34 and is used to heat the heat exchange working fluid passing through the heating device in the first pipe 34. The outlet of the compressor is connected to the cold-side inlet 27 through a second pipe 8. The first nozzle 13 is installed at the inlet of the compressor and is used to spray mist into the inlet of the compressor. The second nozzle 9 is installed at the outlet of the compressor and is used to spray mist into the second pipe 8. The compressor is used to transport the heat exchange working fluid to the heat exchanger 29 through the second pipe 8. The heat exchange working fluid includes air and mist. The working fluid testing device is used to test the physical properties of the heat exchange working fluid. By incorporating a spray device and a working fluid detection device into the seaplane environmental control system, the spray device can spray mist into the system, simulating the actual flight conditions of a seaplane under high humidity and heat intake conditions. Furthermore, the working fluid detection device can detect the physical properties of the heat exchange medium, including its temperature, humidity, pressure, pressure difference at different locations, and flow rate. Specific detection items and locations can be set according to the specific experiment. This allows for the use of a spray-infused heat exchange medium in the study of heat exchanger 29, enabling the testing and research of its heat transfer and flow characteristics under high humidity and heat intake conditions. Considering the wet operating conditions of heat exchanger 29 under high humidity and heat intake conditions allows for a more realistic simulation of the seaplane's environmental control system's operation.

[0032] In this embodiment, the heating device is preferably an electric heating furnace 2, which is installed on the first pipe 34. The electric heating furnace 2 also has a control cabinet 1, which is electrically connected to the electric heating furnace 2 via a power transmission line. The control cabinet 1 is used to supply power to the electric heating furnace 2 and adjust the heating power, thereby adjusting the temperature of the heat exchange medium.

[0033] In this embodiment, the working fluid detection device includes a first detection device, a second detection device, a third detection device, a fourth detection device, and a humidity transmitter 10. The hot-side inlet 32, cold-side inlet 27, hot-side outlet 28, cold-side outlet 30, and compressor outlet are all equipped with a first detection device, which is used to detect the temperature and pressure of the heat exchange working fluid. One end of the second detection device is located at the cold-side inlet 27, and the other end is located at the cold-side outlet 30. The second detection device detects the pressure difference between the cold-side inlet 27 and the cold-side outlet 30. The third detection device is located between the second nozzle 9 and the cold-side inlet 27, and is used to detect the droplet size of the spray. A fourth detection device is installed at both the outlet of the high-pressure gas source 5 and the cold-side outlet 30, and is used to detect the mass flow rate of the heat exchange working fluid. A humidity transmitter 10 is installed at the cold-side inlet 27, cold-side outlet 30, and compressor outlet, and is used to detect the humidity of the heat exchange working fluid. According to the experimental requirements, detection devices are installed at the locations where working fluid detection devices are needed to detect the physical properties of the working fluid, providing basic data for the experiment and facilitating its conduct and analysis.

[0034] In this embodiment, the first detection device preferably includes a pressure transmitter 21 for detecting pressure and a temperature transmitter 33 for detecting temperature.

[0035] In this embodiment, the second detection device preferably uses a differential pressure transmitter 6 to detect the differential pressure. In this embodiment, the pressure transmitter 21, temperature transmitter 33, humidity transmitter 10 and differential pressure transmitter 6 are all installed by inserting the probe 35 into the pipeline through which the heat exchange medium flows and fixing it in place.

[0036] In this embodiment, the third detection device is a laser particle size analyzer 7, which is positioned between the second nozzle 9 and the cold edge inlet 27 to detect the particle size of water droplets in the spray emitted from the second nozzle 9. Specifically, in this embodiment, a transparent observation window 25 is provided on the second pipe 8 between the cold edge inlet 27 and the second nozzle 9, and the laser particle size analyzer 7 is positioned outside the observation window 25 to detect the particle size of water droplets in the spray of the second pipe 8.

[0037] In this embodiment, the thermal and humidity characteristic test platform for the seaplane environmental control system heat exchanger 29 also includes a computer 26, which is communicatively connected to the laser particle size analyzer 7. The computer 26 is used to receive and process the measurement signals from the laser particle size analyzer 7.

[0038] In this embodiment, the fourth detection device includes a first mass flow meter 3 and a second mass flow meter 31. The first mass flow meter 3 is installed at the outlet of the high-pressure gas source 5 and is used to detect the mass flow rate of the heat exchange medium at the outlet of the high-pressure gas source 5. The second mass flow meter 31 is installed at the cold edge outlet 30 and is used to detect the mass flow rate of the heat exchange medium at the cold edge outlet 30.

[0039] In this embodiment, the thermal and humidity characteristic test platform for the seaplane environmental control system heat exchanger 29 also includes a frequency modulator 12. The frequency modulator 12 is electrically connected to the compressor and is used to supply power to the compressor and control the flow rate delivered by the compressor. In this embodiment, the compressor is preferably an electric compressor 11.

[0040] In this embodiment, the thermal and humidity characteristic test platform of the seaplane environmental control system heat exchanger 29 also includes a pneumatic valve 4. The pneumatic valve 4 is located between the first mass flow meter 3 and the high-pressure air source 5. The pneumatic valve 4 is used to adjust the flow rate of the compressor output from the high-pressure air source 5.

[0041] In this embodiment, the spraying device further includes an air compressor 23 and a pressure water tank 20. The pressure water tank 20 includes an air inlet and a water outlet. The outlet of the air compressor 23 is connected to the air inlet of the first nozzle 13, the air inlet of the second nozzle 9, and the water outlet of the pressure water tank 20 is connected to the water inlet of the first nozzle 13 and the water inlet of the second nozzle 9.

[0042] In this embodiment, the medium is classified according to its flow path in the heat exchanger, cold edge, and spray device, including hot path, cold path, and spray pipeline.

[0043] The thermal circuit starts from the high-pressure gas source 5 and connects sequentially to the pneumatic valve 4, the first mass flow meter 3, and the electric heating furnace 2 via flanges. In this embodiment, the first pipe 34 is a stainless steel pipe. The control cabinet 1 is connected to the electric heating furnace 2 via power lines. Then, the stainless steel pipe is connected to the hot edge inlet 32 ​​of the heat exchanger 29 via flanges. The hot edge outlet 28 of the heat exchanger 29 is connected to the stainless steel pipe via flanges. There are pressure transmitters 21 and temperature transmitters 33 near the hot edge inlet and outlet 28 of the heat exchanger 29. The probes of the pressure transmitters 21 and temperature transmitters 33 are inserted into the pipes and fixedly installed.

[0044] The cold circuit begins with the electric compressor 11. A larger cross-section stainless steel reducing duct 15 is installed at the compressor inlet for gas and spray introduction. A frequency modulator 12 is connected to the electric compressor 11 via a power line. The outlet of the electric compressor 11 is connected to a stainless steel pipe via a flange. The other end of the stainless steel pipe is connected to the cold-side inlet 27 of the heat exchanger 29 via a flange. A transparent observation window 25 is machined in the middle of the stainless steel pipe. The cold-side outlet 30 of the heat exchanger 29 is connected to the stainless steel pipe via a flange. The stainless steel pipe is connected to a second mass flow meter 31 via a flange. The probes of the pressure transmitter 21, differential pressure transmitter 6, temperature transmitter 33, and humidity transmitter 10 are inserted into the pipe and fixedly installed. Furthermore, a laser particle size analyzer 7 is placed on both sides of the observation window 25 and connected to a computer 26 via a data cable.

[0045] The spray pipeline starts from the air compressor 23, and connects to the second valve 18, the third valve 22, and the fifth valve 24 via a PU hose and hose connector. After the second valve 18, it connects to the first nozzle 13. After the third valve 22, it connects to the air inlet of the pressure water tank 20. A pressure transmitter 21 for detecting the pressure in the pressure water tank 20 is installed at the air inlet of the pressure water tank 20. After the fifth valve 24, it connects to the second nozzle 9. The bottom of the pressure water tank 20 is provided with a water outlet for discharging water. The water outlet connects to the first valve 19 and the fourth valve 19 via a PU hose and hose connector. Then, it connects to the first water flow meter 14 and the second water flow meter 16, and then to the first nozzle 13 and the second nozzle 9, respectively. The first nozzle 13 and the second nozzle 9 are both fixedly installed by brackets.

[0046] This embodiment also includes pressure, temperature, and humidity monitoring equipment for environmental physical performance testing of the seaplane environmental control system heat exchanger 29 thermal and humidity characteristic test platform. This equipment is used to monitor the physical properties of the environment in which the seaplane environmental control system heat exchanger 29 thermal and humidity characteristic test platform is located, providing environmental parameters for its operation. In this embodiment, when the seaplane environmental control system heat exchanger 29 thermal and humidity characteristic test platform is indoors, environmental monitoring devices for detecting environmental physical performance, such as… Figure 2 The pressure transmitter 21, temperature transmitter 33, and humidity transmitter 10 are directly exposed to the indoor environment.

[0047] In this embodiment, atomizing nozzles are used to spray humidified air onto the cold side of heat exchanger 29, simulating water spraying at the cold side inlet 27 of the secondary radiator in the environmental control system, thereby conducting experimental research on the thermal and humidity characteristics of heat exchanger 29.

[0048] In this embodiment, the compression and heating effect of the electric compressor 11 is utilized to spray water at the inlet of the electric compressor 11. The water droplets and dry air are compressed and heated together in the electric compressor 11. The water droplets evaporate and form high-temperature humid air at the outlet of the electric compressor 11, simulating the high-humidity and heat intake air of the cold side of the secondary radiator in the environmental control system of a seaplane.

[0049] In this embodiment, two-stage spray humidification is implemented, namely at the inlet and outlet of the electric compressor 11. The electric compressor 11 supplies air to the cold side of the heat exchanger 29, and water is sprayed at the compressor inlet. The compressed, humid air serves as the working fluid at the cold side inlet 27 of the heat exchanger 29, where it is further humidified by water spraying before entering the cold side of the heat exchanger 29 for heat exchange. This scheme can simulate the water spray humidification of the seaplane's environmental control system under the high humidity and heat of the secondary radiator's cold side intake air conditions during seaplane flight.

[0050] In this embodiment, a high-pressure air source 5 and an electric heating furnace 2 are used to provide high-temperature and high-pressure air, which facilitates the adjustment of temperature and pressure and can simulate the engine bleed air of the environmental control system.

[0051] Furthermore, mass flow meters can be placed anywhere in the pipeline, not just at the pipeline outlet.

[0052] This embodiment employs a two-stage spray humidification system. Utilizing the compression and heating effect of the electric compressor 11, water is sprayed at the compressor inlet to obtain high-humidity, hot air, simulating the high-humidity, hot air environment of seaplanes. This high-humidity, hot air is then used as the intake air for the cold-side inlet 27 of the heat exchanger 29, where further water humidification continues, simulating the cold-side water humidification of the secondary radiator in the environmental control system. This provides technical support for experimental research on the thermal and humidity characteristics of the heat exchanger 29 in the seaplane environmental control system.

[0053] Example 2

[0054] In this embodiment, the heat transfer and flow characteristics of heat exchanger 29 under high humidity and heat intake conditions are tested and studied using the apparatus described in Embodiment 1. The specific test method is as follows:

[0055] High-pressure air is supplied by high-pressure air source 5. The gas flow rate is regulated by pneumatic valve 4. The mass flow rate of the air in the first pipeline 34 is measured by first mass flow meter 3. The high-pressure air is heated in electric heating furnace 2 to increase its temperature, forming high-temperature, high-pressure air, simulating the bleed air of the seaplane's environmental control system engine. Electric heating furnace 2 adjusts the heating power and heating temperature through control cabinet 1. The high-temperature, high-pressure air is introduced into the hot-side inlet 32 ​​of heat exchanger 29 to exchange heat with the cold-side air, and then discharged from the hot-side outlet 28. Pressure transmitter 21 and temperature transmitter 33 are used at the hot-side inlet and outlet 28 of heat exchanger 29 to collect pressure and temperature signals, obtaining the pressure and temperature data of the air at the hot-side inlet and outlet.

[0056] The cooling system is supplied with air by an electric compressor 11. The air flow rate of the electric compressor 11 is adjusted by a frequency converter 12. Air enters through the inlet of the electric compressor 11 by suction. A first nozzle 13 is installed at the inlet of the electric compressor 11. The first nozzle 13 is connected to the air compressor 23 via a hose and a second valve 18, and to the pressure water tank 20 via a hose and a first valve 19. The air compressor 23 provides high-pressure air, which is divided into two paths. One path goes directly into the first nozzle 13, and the air flow rate is adjusted by the second valve 18. The other path goes into the pressure water tank 20 to pressurize the water tank and increase the water pressure. The water flow rate is adjusted by the first valve 19. A first water flow meter 14 measures the water flow rate. High-pressure air and high-pressure water are mixed and sprayed out through the first nozzle 13, achieving atomization and providing a spray at the inlet of the electric compressor 11. The inlet air and spray enter the compressor together for compression, pressure increase and temperature rise, and the spray water droplets evaporate, forming high-temperature humid air at the compressor outlet, which is then introduced into the cold circuit pipe, simulating the high-humidity and heat intake air of the secondary radiator cold side in the seaplane environmental control system. A pressure transmitter 21, a temperature transmitter 33, and a humidity transmitter 10 are installed at the pipe inlet, i.e., the compressor outlet, to measure the air pressure, temperature, and humidity data at the pipe inlet.

[0057] A second nozzle 9 is installed in the middle of the cold circuit pipeline. The second nozzle 9 is connected to an air compressor 23 outside the pipeline via a hose and a fifth valve 24. It is also connected to a pressure water tank 20 outside the pipeline via a hose and a fourth valve 17. The air compressor 23 provides high-pressure air, which is divided into two paths. One path goes directly into the second nozzle 9, and the air supply flow rate is adjusted by the fifth valve 24. The other path goes into the pressure water tank 20 to pressurize the water tank and increase the water pressure. The water supply flow rate is adjusted by the fourth valve 17. A second water flow meter 16 measures the water supply flow rate. The high-pressure air and high-pressure water are mixed in the second nozzle 9 and sprayed out to achieve atomization, providing a spray of humid air for the cold circuit pipeline, simulating the water spray at the cold side inlet 27 of the secondary radiator of the environmental control system.

[0058] The spray from the cold-circuit pipe mixes with humid air to form an air-water two-phase working fluid. This fluid flows through the pipe observation window 25 and enters the cold-side inlet 27 of the heat exchanger 29. Laser particle size analyzers 7 are arranged on both sides of the pipe observation window 25 to measure the spray particle size. The particle size analyzers collect the spray particle size data and import it into the computer 26 for display. The humid air containing liquid water droplets exchanges heat with the high-temperature, high-pressure air at the cold and hot sides of the heat exchanger 29, absorbing heat and increasing in temperature. It then exits from the cold-side outlet 30 of the heat exchanger 29. A second mass flow meter 31 measures the air flow rate at the outlet. Pressure transmitters 21, temperature transmitters 33, and humidity transmitters 10 measure the pressure, temperature, and humidity of the humid air at both the inlet and outlet of the cold side of the heat exchanger 29. Simultaneously, a differential pressure transmitter 6 measures the inlet and outlet pressure difference.

[0059] The collected thermal data include the air mass flow rate at the hot and cold sides, the water spray volume at the cold side twice, the spray particle size, the inlet and outlet pressure and temperature at the hot side, and the inlet and outlet pressure, pressure difference, temperature, and humidity at the cold side. Under different air mass flow rates at the hot and cold sides, different spray particle sizes at the cold side inlet of the heat exchanger, and two different water spray volumes, the heat exchange efficiency is obtained through the inlet and outlet temperature, the flow resistance of the heat exchanger 29 is obtained through the inlet and outlet pressure difference, and the water evaporation rate is obtained through the inlet and outlet humidity. Finally, the heat transfer and flow resistance characteristics of the heat exchanger 29 are obtained, revealing the thermal and humidity characteristics of the heat exchanger 29. This provides a theoretical basis and experimental support for water spraying at the cold side inlet 27 of the radiator in the environmental control system under high humidity and heat intake conditions.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A test platform for the thermal and humidity characteristics of a heat exchanger in a seaplane environmental control system, characterized in that, include: The system includes a high-pressure gas source, a heating device, a compressor, a spray device, a working fluid detection device, and a heat exchanger, wherein the heat exchanger includes a hot-side inlet, a cold-side inlet, a hot-side outlet, and a cold-side outlet. The spraying device includes a first nozzle and a second nozzle; The outlet of the high-pressure gas source is connected to the hot edge inlet through a first pipe; the heating device is installed on the first pipe and is used to heat the heat exchange medium passing through the heating device in the first pipe. The compressor outlet is connected to the cold side inlet via a second pipe; the first nozzle is located at the compressor inlet for spraying mist into the compressor inlet; the second nozzle is located at the compressor outlet for spraying mist into the second pipe; the compressor is used to transport the heat exchange medium to the heat exchanger via the second pipe. The heat exchange medium includes air and spray, and the working medium detection device is used to detect the physical properties of the heat exchange medium; The working fluid detection device includes a first detection device, a second detection device, a third detection device, a fourth detection device, and a humidity transmitter. The hot-side inlet, the cold-side inlet, the hot-side outlet, the cold-side outlet, and the compressor outlet are all equipped with a first detection device. The first detection device is used to detect the temperature and pressure of the heat exchange working fluid. One end of the second detection device is located at the cold-side inlet, and the other end is located at the cold-side outlet. The second detection device detects the pressure difference between the cold-side inlet and the cold-side outlet. The third detection device is disposed between the second nozzle and the cold edge inlet. The third detection device is used to detect the droplet size of the spray. The outlet of the high-pressure gas source and the cold edge outlet are each provided with a fourth detection device. The fourth detection device is used to detect the mass flow rate of the heat exchange medium. The cold edge inlet, the cold edge outlet and the compressor outlet are each provided with a humidity transmitter. The humidity transmitter is used to detect the humidity of the heat exchange medium. The third detection device is a laser particle size analyzer, which is installed between the second nozzle and the cold edge inlet to detect the size of water droplets in the spray emitted from the second nozzle.

2. The seaplane environmental control system heat exchanger thermal and humidity characteristic test platform according to claim 1, characterized in that, The first detection device is a pressure transmitter and a temperature transmitter.

3. The seaplane environmental control system heat exchanger thermal and humidity characteristic test platform according to claim 1, characterized in that, The second detection device is a differential pressure transmitter.

4. The seaplane environmental control system heat exchanger thermal and humidity characteristic test platform according to claim 3, characterized in that, It also includes a computer, which is communicatively connected to the laser particle size analyzer, and the computer is used to receive and process the measurement signals from the laser particle size analyzer.

5. The seaplane environmental control system heat exchanger thermal and humidity characteristic test platform according to claim 1, characterized in that, The fourth detection device includes a first mass flow meter and a second mass flow meter. The first mass flow meter is installed at the outlet of the high-pressure gas source and is used to detect the mass flow rate of the heat exchange medium at the outlet of the high-pressure gas source. The second mass flow meter is installed at the cold side outlet and is used to detect the mass flow rate of the heat exchange medium at the cold side outlet.

6. The seaplane environmental control system heat exchanger thermal and humidity characteristic test platform according to claim 5, characterized in that, It also includes a frequency modulator, which is electrically connected to the compressor and is used to supply power to the compressor and control the flow rate delivered by the compressor.

7. The seaplane environmental control system heat exchanger thermal and humidity characteristic test platform according to claim 6, characterized in that, It also includes a pneumatic valve, which is disposed between the first mass flow meter and the high-pressure air source, and is used to regulate the flow rate of the compressor delivered by the high-pressure air source.

8. The seaplane environmental control system heat exchanger thermal and humidity characteristic test platform according to claim 1, characterized in that, The spraying device further includes an air compressor and a pressurized water tank. The pressurized water tank includes an air inlet and a water outlet. The outlet of the air compressor is connected to the air inlet of the first nozzle, the air inlet of the first nozzle, and the air inlet of the second nozzle. The water outlet of the pressurized water tank is connected to the water inlet of the first nozzle and the water inlet of the second nozzle.

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