Composite thermoelectric system testing device and testing method

Abstract

The invention discloses a composite thermoelectric system testing device and method. The device is divided into an upper testing unit and a lower testing unit through a sample table. The upper testing unit comprises a fixed pressing plate, a heat insulation block, a first simulation heat source, a vapor chamber and a supporting rod. Heat provided by the first simulation heat source is uniformly distributed to the surface of the hot end of the thermoelectric device through the vapor chamber to heat the tested electric device, and the cooling unit provides low temperature for the other end of the device to form a stable temperature gradient field, so that the device is suitable for testing the electrical performance of the thermoelectric device. The lower testing unit comprises a sample table, a filter fixing frame, a filter, a radiator and a second simulation heat source. The second simulation heat source provides heat radiation which is gathered and amplified by the radiator to form high-energy radiation, the high-energy radiation is selectively filtered by the filter and then projected to a tested device on the sample table, and the device is suitable for testing the performance of a thermophotovoltaic device. And a second simulation source is used, and a temperature gradient is self-built through a closed space, so that thermophotovoltaic-thermoelectric composite thermoelectric testing is realized.

Description

Technical Field

[0001] The invention belongs to the field of thermoelectric conversion technology testing, in particular to a composite thermoelectric system testing device and a testing method. Background Art

[0002] In recent years, with the increasingly severe energy crisis and environmental problems, how to efficiently utilize thermal energy resources has become a hot issue in the field of energy research. Among them, thermoelectric devices and thermophotovoltaic devices have gradually become an important direction for the development of new energy technologies due to their ability to directly achieve thermoelectric conversion.

[0003] The current research and development of thermoelectric devices and thermophotovoltaic devices faces many challenges, especially in device performance testing. Traditional test equipment is usually designed for a single device type, and lacks a comprehensive test platform suitable for a variety of energy conversion devices. In addition, due to the different working principles of thermoelectric devices and thermophotovoltaic devices, their requirements for test conditions are significantly different. For example, thermoelectric devices require accurate temperature difference control, while thermophotovoltaic devices require precise matching of radiation wavelength and power density. Existing testing methods often use separate equipment to test the two devices separately, which makes it difficult to achieve unified test standards and comprehensive evaluation of multi-level energy utilization. This separate testing method not only increases the cost and complexity of testing, but also makes it difficult to meet the needs of system integrated design and performance optimization.

[0004] In addition, multi-stage conversion of thermal energy utilization has gradually become one of the key technologies in energy research. In practical applications, thermophotovoltaic devices and thermoelectric devices can often be used in combination to achieve multi-stage energy recovery from high-temperature radiation to low-temperature thermal energy. However, existing test devices lack the ability to collaboratively evaluate the multi-stage energy utilization process, making it difficult to comprehensively analyze the energy transfer and conversion efficiency between different devices. This technical gap restricts the optimization and promotion of multi-stage energy utilization systems.

[0005] Therefore, developing a comprehensive testing device that can be used for both thermoelectric devices and thermophotovoltaic devices can not only meet the needs of independent testing of the two devices, but also realize joint testing and multi-level energy utilization evaluation, which has important scientific research value and practical application significance. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention provides a thermoelectric system testing device and a testing method capable of simultaneously testing thermoelectric devices and thermophotovoltaic devices.

[0007] The present invention is implemented as follows: a composite thermoelectric system testing device includes an upper testing unit for testing a thermoelectric device and a lower testing unit for testing a thermophotovoltaic device, the upper testing unit and the lower testing unit being arranged together in a sealed housing;

[0008] The sealed housing is composed of a detachable sealed upper cover, a sealed middle cylinder and a sealed lower cover. The sealed upper cover is provided with a gas replacement interface, and the sealed middle cylinder is provided with an observation window and fixed with an electrical connector.

[0009] The lower test unit includes a sample table, a filter fixing frame, a filter, a radiator, a second simulated heat source, and a heat source sealing shell. The heat source sealing shell is fixed on the sealed lower cover, the second simulated heat source is placed on the inner bottom plate of the heat source sealing shell, and the radiator is embedded in the top plate of the heat source sealing shell. The sample table is mounted above the radiator through a pair of second support rods and fits well with the filter fixing bracket. The sample table is a hollow structure and different hole positions are configured according to samples of different sizes. The filter is placed on the filter fixing frame and the distance between it and the radiator is adjusted by the second support rods.

[0010] The upper test unit includes a fixed pressure plate, an insulation block, a first simulated heat source, a heat spreader, a first support rod, and a cooling unit. A pair of first support rods are supported on the sample table. The cooling unit is slidably arranged at the lower part of the pair of first support rods. The fixed pressure plate is slidably arranged at the upper part of the pair of first support rods. The insulation block, the first simulated heat source and the heat spreader are fixed in sequence below the fixed pressure plate.

[0011] The sealing upper cover, the sealing middle cylinder, the fixed pressing plate, the sample stage, the filter fixing frame, the heat source sealing shell, the sealing lower cover and the supporting rod are made of high-temperature alloy steel.

[0012] The observation window is made of quartz glass.

[0013] The heat insulation block, the first simulated heat source, and the heat spreader are fixed in sequence from top to bottom and parallel to each other under the fixed pressure plate.

[0014] The cooling unit is a cooling water jacket with circulating water inlet and outlet pipes, or a phase change heat storage device with corresponding temperature and volume is used according to the cold end temperature requirements and heat input conditions.

[0015] The gas replacement interface controls the gas environment in the device according to the test environment requirements.

[0016] The test method of the composite thermoelectric system test device is characterized in that:

[0017] When testing the thermoelectric device, turn on the first simulated heat source and set it to the specified test temperature, turn on the cooling unit and place the sample on it, press the fixed pressing plate down along the first supporting rod until the heat spreader and the sample are tightly attached and fixed with a fastening nut, and then the test can begin;

[0018] When testing the thermophotovoltaic device, turn on the second simulated heat source and set it to the specified test temperature. According to the wavelength range of light absorbed by the tested thermophotovoltaic device, select a suitable filter, place the sample on the sample table and turn on the cooling unit. Press the cooling unit down along the first support rod until it fits tightly against the sample and fix it with a tightening nut to start the test.

[0019] The advantages and technical effects of the present invention are as follows:

[0020] (1) Through modular design, a single high-temperature radiation source is used to control the simultaneous measurement of thermophotovoltaic and thermoelectric composite devices. Different simulation sources can also be selected according to actual needs to measure thermophotovoltaic cells or thermoelectric devices separately, greatly improving the test efficiency and the practicality and flexibility of the test device.

[0021] (2) The device is equipped with two independent simulated heat sources, which are used to heat different devices respectively; a single cooling unit can act on the test samples separately to achieve a stable temperature gradient field or temperature control. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the thermoelectric system testing device of the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as “upper”, “middle”, “lower”, “inside”, “outside”, and “both sides” are based on the orientations or positional relationships shown in the accompanying drawings, and are only simplified descriptions for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] like Figure 1As shown, the composite thermoelectric system testing device of the present invention comprises an upper testing unit for testing a thermoelectric device and a lower testing unit for testing a thermophotovoltaic device, and the upper testing unit and the lower testing unit are arranged together in a sealed housing;

[0027] The sealed housing is composed of a detachable sealed upper cover 2, a sealed middle cylinder 3 and a sealed lower cover 17. The sealed upper cover 2 is provided with a gas replacement interface 1, and the sealed middle cylinder 3 is provided with an observation window 6 and a fixed electrical connector 13.

[0028] The lower test unit includes a sample table 10, a filter fixing frame 11, a filter 12, a radiator 14, a second simulated heat source 16, and a heat source sealing shell 15. The heat source sealing shell 15 is fixed on the sealing lower cover 17, the second simulated heat source 16 is placed on the inner bottom plate of the heat source sealing shell 15, and the radiator 14 is embedded in the top plate of the heat source sealing shell 15. The sample table 10 is mounted above the radiator 14 through a pair of second support rods 28, and is fitted with the filter fixing bracket 11. The sample table 10 is a hollow structure, and different hole positions are configured according to samples of different sizes. The filter 12 is placed on the filter fixing frame 11, and the distance between the filter and the radiator is adjusted by the second support rods 28;

[0029] The upper test unit includes a fixed pressure plate 4, an insulation block 5, a first simulated heat source 7, a heat spreader 8, a first support rod 18, and a cooling unit 9. A pair of first support rods 18 are supported on a sample table 10. The cooling unit 9 is slidably disposed at the lower part of the pair of first support rods 18. The fixed pressure plate 4 is slidably disposed at the upper part of the pair of first support rods 18. The insulation block 5, the first simulated heat source 7 and the heat spreader 8 are fixed in sequence below the fixed pressure plate 4.

[0030] The sealing upper cover 2, the sealing middle cylinder 3, the fixed pressure plate 4, the sample stage 10, the filter fixing frame 11, the heat source sealing shell 15, the sealing lower cover 17 and the support rod 18 are made of high temperature alloy steel.

[0031] The material of the observation window 6 is quartz glass.

[0032] The heat insulation block 5 , the first simulated heat source 7 , and the heat spreader 8 are fixed in sequence from top to bottom and parallel to each other below the fixed pressure plate 4 .

[0033] The cooling unit 9 is a cooling water jacket with circulating water inlet and outlet pipes, or a phase change heat storage device with corresponding temperature and volume is used according to the cold end temperature requirements and heat input conditions.

[0034] The gas replacement interface 1 controls the gas environment in the device according to the test environment requirements.

[0035] On the bottom plate of the heat source sealed shell 15, the sample stage 10 is set above the radiator 14 and fits with the filter fixing bracket 11. The sample stage 10 is a hollow structure and different holes are configured according to samples of different sizes. It is suitable for an area of ​​4cm 2 ~110cm 2 The filter 12 is placed on the filter fixing frame 11 and the distance between the filter and the radiator can be adjusted by the support rod 18, and the adjustment distance range is 5cm to 20cm.

[0036] The fixed pressure plate 4, the cooling unit 9 and the support rod 18, and the fixed pressure plate 4 / insulation block 5 / first heat source 7 / heat spreader 8 and the support rods 18 and 28 can be adjusted and connected by moving up and down to accommodate samples to be tested of different heights. The sample to be tested can also be integrated and coupled with the cooling unit first, and then the test sample can be installed on the sample table 10.

[0037] The test method of the composite thermoelectric system test device comprises:

[0038] When testing the thermoelectric device, turn on the first simulated heat source 7 and set it to the specified test temperature, turn on the cooling unit 9 and place the sample on it, press the fixed pressing plate 4 along the first supporting rod 18 until the heat plate 8 is tightly attached to the sample and fix it with a fastening nut, and then start the test;

[0039] When testing the thermophotovoltaic device, turn on the second simulated heat source 16 and set it to the specified test temperature. According to the wavelength range of light absorbed by the tested thermophotovoltaic device, select a suitable filter 12, place the sample on the sample table 10 and turn on the cooling unit 9, press the cooling unit 9 down along the first support rod 18 until it fits tightly against the sample and fix it with a tightening nut, and then start the test.

[0040] The device can perform performance tests on a single thermoelectric device by controlling any single simulation source alone, and can also realize composite tests on thermoelectric devices and thermophotovoltaic devices by controlling a second simulation source and self-building a temperature gradient field under the condition that the device is sealed.

[0041] The composite thermoelectric system test device of the present invention can test thermoelectric devices and thermophotovoltaic devices at the same time. The device includes an upper test unit and a lower test unit. The upper test unit is a thermoelectric device test unit, and the lower test unit is a thermophotovoltaic device test unit. The test process of the composite thermoelectric system test device of the present invention is as follows:

[0042] When testing the thermoelectric device, the upper test unit is used, the first simulated heat source 7 is turned on and set to the specified test temperature, the cooling unit 9 is turned on and the sample is placed on it, the fixed pressure plate 4 is pressed down along the support rod 18 until the heat plate 8 is tightly attached to the sample and fixed with a fastening nut, and the gas environment in the gas displacement interface 1 device is controlled according to the requirements of the test environment. The heat provided by the first simulated heat source 7 is evenly distributed to the upper surface of the thermoelectric device through the heat plate, heating the test thermoelectric device, and the cooling unit provides a low temperature at the other end to form a stable temperature difference field, and the test can begin.

[0043] When testing the thermophotovoltaic device, the lower test unit is used, the second simulated heat source 16 is turned on and set to the specified test temperature, and the appropriate filter 12 is selected according to the wavelength range of light absorbed by the test thermophotovoltaic device, the sample is placed on the sample stage 10 and the cooling unit 9 is turned on, the cooling unit 9 is pressed down along the support rod 18 until it fits tightly with the sample and is fixed with a fastening nut, and the gas environment in the gas replacement interface 1 device is controlled according to the requirements of the test environment. The high-energy radiation formed by the heat radiation provided by the second simulated heat source 16 and gathered and amplified by the radiator 14 is selectively filtered by the filter 12, and will pass through the filter 12 and be projected onto the thermophotovoltaic device placed on the sample stage 10, and finally the conversion efficiency of the thermophotovoltaic device is tested.

[0044] The temperature of the first simulated heat source 7 can be adjusted in the range of 1170K to 1770K, the temperature of the second simulated heat source 16 can be adjusted in the range of 300K to 980K, and the temperature of the cooling unit can be adjusted in the range of 183K to 323K. The filter 12 can adjust the wavelength range of 300nm to 2000nm. The gas replacement interface 1 is controlled to adjust the gas environment in the device according to the requirements of the test environment.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite thermoelectric system testing device, characterized in that: It comprises an upper test unit for testing a thermoelectric device and a lower test unit for testing a thermophotovoltaic device, wherein the upper test unit and the lower test unit are arranged together in a sealed housing; The sealed housing is composed of a detachable sealed upper cover (2), a sealed middle cylinder (3) and a sealed lower cover (17); the sealed upper cover (2) is provided with a gas replacement interface (1), and the sealed middle cylinder (3) is provided with an observation window (6) and an electrical connector (13) fixed thereto; The lower test unit comprises a sample table (10), a filter fixing frame (11), a filter (12), a radiator (14), a second simulated heat source (16), and a heat source sealing shell (15). The heat source sealing shell (15) is fixed on the sealing lower cover (17). The second simulated heat source (16) is placed on the inner bottom plate of the heat source sealing shell (15). The radiator (14) is embedded in the top plate of the heat source sealing shell (15). The sample table (10) is mounted above the radiator (14) through a pair of second support rods (28) and is fitted with the filter fixing frame (11). The sample table (10) is a hollow structure and is configured with different hole positions according to samples of different sizes. The filter (12) is placed on the filter fixing frame (11) and the distance between the filter and the radiator is adjusted by the second support rods (28). The upper test unit comprises a fixed pressure plate (4), a heat insulation block (5), a first simulated heat source (7), a heat spreader (8), a first support rod (18), and a cooling unit (9); a pair of first support rods (18) are supported on a sample table (10); the cooling unit (9) is slidably arranged at the lower part of the pair of first support rods (18); the fixed pressure plate (4) is slidably arranged at the upper part of the pair of first support rods (18); and the heat insulation block (5), the first simulated heat source (7), and the heat spreader (8) are fixed in sequence below the fixed pressure plate (4).

2. The composite thermoelectric system testing device according to claim 1, characterized in that: The sealing upper cover (2), the sealing middle cylinder (3), the fixed pressure plate (4), the sample stage (10), the filter fixing frame (11), the heat source sealing shell (15), the sealing lower cover (17), and the support rod (18) are made of high-temperature alloy steel.

3. The composite thermoelectric system testing device according to claim 1, characterized in that: The material of the observation window (6) is quartz glass.

4. The composite thermoelectric system testing device according to claim 1, characterized in that: The heat insulation block (5), the first simulated heat source (7), and the heat diffusion plate (8) are fixed in order from top to bottom in parallel to each other below the fixed pressure plate (4).

5. The composite thermoelectric system testing device according to claim 1, characterized in that: The cooling unit (9) is a cooling water jacket with circulating water inlet and outlet pipes, or a phase change heat storage device with corresponding temperature and volume is used according to the cold end temperature requirements and heat input conditions.

6. The composite thermoelectric system testing device according to claim 1, characterized in that: The gas replacement interface (1) controls the gas environment in the device according to the test environment requirements.

7. The testing method of the composite thermoelectric system testing device according to any one of claims 1 to 3, characterized in that: When testing the thermoelectric device, the first simulated heat source (7) is turned on and set to the specified test temperature, the cooling unit (9) is turned on and the sample is placed thereon, the fixed pressing plate (4) is pressed down along the first supporting rod (18) until the heat spreader (8) and the sample are tightly attached and fixed with a tightening nut, and then the test can be started; When testing a thermophotovoltaic device, the second simulated heat source (16) is turned on and set to a specified test temperature. According to the wavelength range of light absorbed by the tested thermophotovoltaic device, a suitable filter (12) is selected. The sample is placed on the sample table (10) and the cooling unit (9) is turned on. The cooling unit (9) is pressed down along the first support rod (18) until it is tightly attached to the sample and fixed with a tightening nut, and then the test can be started.

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