An experimental tester for thermovoltaic power generation

Abstract

The present invention discloses an experimental tester for thermovoltaic power generation, comprising: a power generation device, the power generation device comprising: a hot-end heat sink, a cold-end heat sink, a thermoelectric module arranged between the hot-end heat sink and the cold-end heat sink, wherein the thermoelectric module comprises a ceramic plate sandwiched between two sides of a thermoelectric material; a heat source device connected to the hot-end heat sink; a cold source device connected to the cold-end heat sink; a pressure measuring device connected to the pressure measuring holes at the inlet and outlet of the hot-end heat sink or the cold-end heat sink; a temperature measuring device connected to the ceramic plate; the electrical test device connected to the power output end of the power generation device; the centralized control device for displaying, setting, and analyzing experimental parameters; and a power supply device. The experimental tester for thermovoltaic power generation described in the present invention can simulate the power generation of geothermal water in a thermovoltaic generator.

Description

Technical Field

[0001] The invention relates to the field of power generation testing, and in particular to an experimental tester for thermovoltaic power generation. Background Art

[0002] The earth's geothermal energy reserves are huge, 170 million times that of coal resources (Wang Zhujin. Rethinking geothermal resources [J]. Earth, 2013(1):62-65.). Waste heat from high-temperature heat sources such as power plant boilers and automobile exhaust is directly discharged into the atmosphere, resulting in energy waste. The above heat energy can be developed and recovered through thermovoltaic power generation (Zhao Fuzhou, Wang Xiumin, Liang Rong, et al. Current status and key technology analysis of automobile thermoelectric waste heat recovery [J]. Small internal combustion engines and motorcycles, 2013, 42(2):93-96.).

[0003] The efficiency of thermovoltaic power generation mainly depends on the ZT value of the thermoelectric material. The current ZT value of room temperature thermoelectric materials is about 1.2, and the thermoelectric conversion efficiency is only about 3.6% (DK Aswal et al. / Energy Conversion and Management 114(2016) 50-67). In order to improve the thermoelectric conversion efficiency, it is necessary to improve the power generation device composed of the heat sink structure and conduct a large number of experimental tests on different thermoelectric materials in the laboratory.

[0004] However, there is currently no experimental test device for thermovoltaic power generation that can realize centralized display and precise control functions, intelligent cold and hot water source functions, and automatic real-time measurement functions.

[0005] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide an experimental tester for thermovoltaic power generation, aiming to solve the problem that the experimental test device for thermovoltaic power generation in the prior art does not have centralized display and control function, intelligent cold and hot water source function, and automatic real-time measurement function.

[0007] An experimental tester for thermovoltaic power generation, comprising:

[0008] A power generation device, the power generation device comprising: a hot end heat sink, a cold end heat sink, a thermoelectric module arranged between the hot end heat sink and the cold end heat sink, and ceramic plates arranged between the hot end heat sink and the thermoelectric module and between the cold end heat sink and the thermoelectric module;

[0009] A power generation device, the power generation device comprising: a hot end heat sink, a cold end heat sink, a thermoelectric module disposed between the hot end heat sink and the cold end heat sink, wherein the thermoelectric module comprises a ceramic plate sandwiched between two sides of a thermoelectric material; a heat source device connected to the hot end heat sink;

[0010] A cold source device connected to the cold end heat sink;

[0011] A pressure measuring device connected to the pressure measuring holes at the inlet and outlet of the hot end heat sink or the cold end heat sink;

[0012] a temperature measuring device connected to the ceramic plate;

[0013] an electrical testing device connected to the power output terminal of the power generating device;

[0014] A centralized control device connected to the heat source device, the cold source device, the pressure measuring device, the temperature measuring device, and the electrical testing device for displaying, setting, and analyzing experimental parameters;

[0015] A power supply device connected to the heat source device, the cold source device, the pressure measuring device, the electrical testing device, and the centralized control device respectively.

[0016] In the experimental tester for thermovoltaic power generation, the hot-end heat sink and the cold-end heat sink are both a metal plate with a flow channel inside.

[0017] The experimental tester for thermovoltaic power generation, wherein the heat source device includes: a high-temperature variable frequency pump, a heat source water tank connected to one end of the high-temperature variable frequency pump by a pipeline, a first high-temperature electric valve and a second high-temperature electric valve connected to the other end of the high-temperature variable frequency pump by pipelines, and a variable frequency heater connected to the first high-temperature electric valve by a pipeline; the variable frequency heater is connected to the heat source water tank by a pipeline; the second high-temperature electric valve is connected to the hot end heat sink by a pipeline, and the hot end heat sink is connected to the heat source water tank by a pipeline.

[0018] The experimental tester for thermovoltaic power generation, wherein the cold source device includes: a low-temperature variable frequency pump, a cold source water tank connected to one end of the low-temperature variable frequency pump, a first low-temperature electric valve and a second low-temperature electric valve respectively connected to the other end of the low-temperature variable frequency pump through pipelines, and a variable frequency refrigerator connected to the first low-temperature electric valve through a pipeline; the variable frequency refrigerator is connected to the cold source water tank through a pipeline; the second low-temperature electric valve is connected to the cold end heat sink through a pipeline, and the cold end heat sink is connected to the cold source water tank through a pipeline.

[0019] The experimental tester for thermovoltaic power generation, wherein the temperature measuring device comprises: a plurality of thermocouples, a hub connected to the thermocouples;

[0020] The thermocouple is connected to the temperature measuring points distributed on the ceramic plate.

[0021] The experimental tester for thermovoltaic power generation, wherein the electrical testing device comprises: a power meter connected to the power output end of the power generation device.

[0022] The experimental tester for thermovoltaic power generation, wherein the pressure measuring device comprises: a differential pressure transmitter connected to the pressure measuring holes at the inlet and outlet of the hot end heat sink.

[0023] The experimental tester for thermovoltaic power generation, wherein the centralized control device includes a NI data collector and a display.

[0024] The experimental tester for thermovoltaic power generation, wherein the power supply device includes a main distribution cabinet and a DC power supply.

[0025] The experimental tester for thermovoltaic power generation, wherein the number of the thermocouples is 2-50.

[0026] Beneficial effects: The experimental tester for thermovoltaic power generation described in the present invention can simulate the power generation of geothermal water in a thermovoltaic generator, obtain thermodynamic parameters such as the temperature at various positions on both sides of the thermoelectric module, the pressure difference at the inlet and outlet of the heat sink, and the electrical parameters of the generator output, and can uniformly display and regulate the above parameters in a centralized control device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram showing the relationship between various devices in the experimental tester for thermovoltaic power generation described in the present invention.

[0028] Figure 2 It is a schematic diagram of the structure of the experimental tester for thermovoltaic power generation according to the present invention.

[0029] Figure 3 The figure is a schematic diagram of the structure of the heat source device in the experimental tester for thermovoltaic power generation according to the present invention.

[0030] Figure 4 The figure is a schematic diagram of the structure of the cold source device in the experimental tester for thermovoltaic power generation according to the present invention.

[0031] Figure 5 The present invention is a schematic diagram of the structure of the power generation device, pressure measurement device, temperature measurement device and electrical test device in the experimental tester for thermovoltaic power generation described in the present invention.

[0032] Figure 6 It is a three-dimensional stereogram of the experimental tester for thermovoltaic power generation.

[0033] In the figure: 1-heat source device, 11-heat source water tank, 12-high temperature variable frequency pump, 13-first high temperature electric valve, 14-variable frequency heater, 1.-second high temperature electric valve, 16-heat source flow meter, 17-heat source thermometer, 18-heat source distribution box, 19-heat source controller;

[0034] 2-cold source device, 21-cold source water tank, 22-low temperature variable frequency pump, 23-first low temperature electric valve, 241-evaporator, 242-variable frequency compressor, 243-condenser, 244-throttle valve, 25-second high temperature electric valve, 26-heat source flow meter, 27-heat source thermometer, 28-heat source distribution box, 29-heat source controller;

[0035] 3-power generation device, 31-hot end heat sink, 311 / 312-pressure measuring hole, 32-cold end heat sink, 331-thermoelectric material, 332 ceramic plate;

[0036] 4-pressure measuring device, 41-differential pressure transmitter;

[0037] 5-temperature measuring device, 51-thermocouple, 52-hub;

[0038] 6-Electrical test device, 61-Power meter;

[0039] 7-centralized control device, 71-NI data acquisition device, 72-display;

[0040] 8-power supply device, 81-main distribution cabinet, 82-DC power supply. DETAILED DESCRIPTION

[0041] The present invention provides an experimental tester for thermovoltaic power generation. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] like Figure 1-6 As shown, the present invention provides an experimental tester for thermovoltaic power generation, which includes:

[0043] A power generation device 3, the power generation device 3 comprising: a hot end heat sink 31, a cold end heat sink 32, and a thermoelectric module disposed between the hot end heat sink 31 and the cold end heat sink 32, wherein the thermoelectric module comprises a ceramic plate 332 sandwiched between two sides of a thermoelectric material 331, and the power generation device 3 is used to generate electricity using a temperature difference at both ends of the power generation module 33;

[0044] A heat source device 1, the heat source device 1 is connected to the hot end heat sink 31, and is used to adjust the temperature of the hot end heat sink 31;

[0045] A cold source device 2, the cold source device 2 is connected to the cold end heat sink 32, and is used to adjust the temperature of the cold end heat sink 32;

[0046] A pressure measuring device 4 connected to the pressure measuring holes at the inlet and outlet of the hot end heat sink 31 or the cold end heat sink 32;

[0047] A temperature measuring device 5, which is connected to the ceramic plate 332 and is used to measure the temperature on both sides of the thermoelectric material;

[0048] An electrical testing device 6, the electrical testing device 6 is connected to the power output terminal of the power generation device 3, and is used to measure electrical parameters of the power generation device 3;

[0049] A centralized control device 7 for displaying, setting and analyzing experimental parameters is connected to the heat source device 1, the cold source device 2, the pressure measuring device 4, the temperature measuring device 5 and the electrical testing device 6 respectively;

[0050] A power supply device 8 connected to the heat source device 1, the cold source device 2, the pressure measuring device 4, the electrical testing device 5, and the centralized control device 7 respectively.

[0051] Preferably, the experimental parameters include: the temperature and flow rate of the heat source device 1 and the cold source device 2 , and the thermodynamic parameters and electrical parameters of the power generation device 3 .

[0052] The experimental tester for thermovoltaic power generation of the present invention comprises a heat source device 1, a cold source device 2, a power generation device 3, a temperature measuring device 5, an electrical testing device 6, a centralized control device 7 and a power supply device 8. The heat source device 1 and the cold source device 2 are heat sources and cold sources that can provide accurate temperature and flow for the power generation device 3. The power generation device 3 converts thermal energy into electrical energy by using the temperature difference between the heat source and the cold source. The pressure measuring device 4 and the temperature measuring device 5 respectively measure thermodynamic parameters such as pressure and temperature in the power generation device. The electrical measuring device 6 measures electrical parameters such as voltage, current, power output by the power generation device 3. The centralized control device 7 is respectively connected to the heat source device 1, the cold source device 2, the pressure measuring device 4, the temperature measuring device 5 and the electrical measuring device 6, and can centrally display and regulate the temperature and flow of the heat source and the cold source, and can also display the thermodynamic parameters and electrical parameters of the power generation device. The power supply device 8 can provide an AC power supply and a DC power supply of corresponding voltages for the entire device. The experimental tester for thermovoltaic power generation described in the present invention can simulate the power generation of 70~100℃ geothermal water in a thermovoltaic generator, and obtain thermodynamic parameters such as the temperature at various positions on both sides of the thermoelectric module, the pressure difference between the heat sink inlet and outlet, and the electrical parameters of the generator output, and uniformly display and control them in the centralized control device 7.

[0053] Preferably, the thermoelectric module includes: a P-type semiconductor, an N-type semiconductor and a ceramic plate 332, that is, the thermoelectric material 331 includes: a P-type semiconductor and an N-type semiconductor. The P-type semiconductor and the N-type semiconductor are connected according to a certain rule (such as the P-type semiconductor and the N-type semiconductor are arranged alternately), and the two sides of the P-type semiconductor and the N-type semiconductor are clamped by the ceramic plate 332. The experimental tester for thermovoltaic power generation of the present invention realizes the thermoelectric performance experimental test of different thermoelectric materials 331 by replacing the thermoelectric material 331 in the thermoelectric module.

[0054] The heat sink (hot end heat sink 31 and cold end heat sink 32) of the present invention is a small heat exchanger. Preferably, the hot end heat sink 31 and the cold end heat sink 32 are both a metal plate with a flow channel inside. Furthermore, the inlet and outlet (inlet and outlet of the heat sink) of the hot end heat sink 31 and the cold end heat sink 32 are respectively arranged at the two ends of the metal plate, and the inlet and outlet realize the conduction of the flow channel in the metal plate with the outside.

[0055] Preferably, the ceramic plate 332 is made of a heat-conducting material, such as an alumina ceramic material or an aluminum nitride ceramic material. The power generation module 33 can be placed with different thermoelectric materials, so as to test the thermoelectric performance of the thermoelectric materials.

[0056] The temperature measuring device 4 of the present invention is used to measure the pressure parameters of the pressure measuring holes 311 / 312 at the inlet and outlet of the hot-end heat sink 31 or the cold-end heat sink 32. The pressure measuring device 4 measures the pressure at the inlet and outlet of the hot-end heat sink 31 or the cold-end heat sink, thereby obtaining the pressure difference at the inlet and outlet of the hot-end heat sink 31 or the cold-end heat sink 32. The heat sink inlet and outlet pressure difference characterizes the magnitude of the flow resistance loss inside the heat sink, and is one of the important indicators for judging the performance of the heat sink. The experimental tester of the present invention improves the efficiency of the power generation device by improving the heat sink, so the heat sink inlet and outlet pressure difference is an important measurement parameter of this test device.

[0057] Preferably, the pressure measuring device 4 is connected to the pressure measuring holes 311 / 312 at the inlet and outlet of the hot end heat sink 31. The reason why only the inlet and outlet pressure difference of the hot end heat sink 31 needs to be measured is that the structure and flow rate of the cold end heat sink 32 and the hot end heat sink 31 are basically the same, and the pressure loss is basically the same in theory. However, for the power generation device 3 whose structure or flow rate of the cold end heat sink 32 and the hot end heat sink 31 are inconsistent, it is necessary to measure the inlet and outlet pressure difference of both the cold end heat sink 32 and the hot end heat sink 31.

[0058] Specifically, the pressure measuring device 4 includes: a differential pressure transmitter 41, and the differential pressure transmitter 41 is connected to the pressure measuring holes 311 / 312 at the inlet and outlet of the hot end heat sink 31. That is to say, the differential pressure transmitter 41 in the pressure measuring device 4 is connected to the pressure measuring holes 311 / 312 at the inlet and outlet of the hot end heat sink 31, and can measure the pressure difference at the inlet and outlet of the hot end heat sink 31, and transmit the pressure difference signal to the centralized control device 7. The number of differential pressure transmitters 41 required for the pressure measuring device 4 depends on the number of positions where the pressure difference needs to be measured. For example, at multiple (such as 4) positions where pressure measurement is required at the inlet and outlet of the hot end heat sink 31, multiple (such as 4) pressure measuring holes 311 / 312 can be opened, and multiple (such as 4) differential pressure transmitters can be set accordingly. Preferably, the pressure measuring device only needs one differential pressure transmitter 41 to measure the pressure difference between the inlet and outlet of the hot end heat sink 31.

[0059] Preferably, the heat source device 1 includes: a high-temperature variable frequency pump 12, a heat source water tank 11 connected to one end of the high-temperature variable frequency pump 12, a first high-temperature electric valve 13 and a second high-temperature electric valve 15 respectively connected to the other end of the high-temperature variable frequency pump 12 through pipelines, and a variable frequency heater 14 connected to the first high-temperature electric valve 13 through a pipeline; the variable frequency heater 12 is connected to the heat source water tank 11 through a pipeline; the second high-temperature electric valve 15 is connected to the hot end heat sink 31 through a pipeline, and the hot end heat sink 31 is connected to the heat source water tank 11 through a pipeline.

[0060] The heat source device 1 described in the present invention includes two branch pipes, namely a high-temperature internal branch pipe and a high-temperature external branch pipe, wherein the high-temperature internal branch pipe is connected to the heat source water tank 11 by the high-temperature variable frequency pump 12 in sequence through the first high-temperature electric valve 13 and the variable frequency heater 14, and the high-temperature internal branch pipe can heat the liquid flowing through it through the variable frequency heater 14; the high-temperature external branch pipe is connected to the heat source water tank 11 by the high-temperature variable frequency pump 12 in sequence through the second high-temperature electric valve 15 and the hot end heat sink 31, and the high-temperature external branch pipe can control the temperature, flow rate and other parameters of the liquid flowing through the hot end heat sink 31.

[0061] Preferably, corresponding to the heat source device 1, the cold source device 2 includes: a low-temperature variable frequency pump 22, a cold source water tank 21 connected to one end of the low-temperature variable frequency pump 22, a first low-temperature electric valve 23 and a second low-temperature electric valve respectively connected to the other end of the low-temperature variable frequency pump 22 through pipelines, and a variable frequency refrigerator connected to the first low-temperature electric valve 23 through a pipeline; the variable frequency refrigerator is connected to the cold source water tank 21 through a pipeline; the second low-temperature electric valve 25 is connected to the cold end heat sink 32 through a pipeline, and the cold end heat sink 32 is connected to the cold source water tank 21 through a pipeline.

[0062] The cold source device 2 of the present invention includes two branch pipes, namely, a low-temperature internal branch pipe and a low-temperature external branch pipe, wherein the low-temperature internal branch pipe is connected to the cold source water tank 21 by the low-temperature variable frequency pump 22 in sequence through the first low-temperature electric valve 23 and the variable frequency refrigerator, and the low-temperature internal branch pipe can refrigerate the liquid flowing through the variable frequency refrigerator; the low-temperature external branch pipe is connected to the cold source water tank 21 by the low-temperature variable frequency pump 22 in sequence through the second low-temperature electric valve 25 and the variable frequency refrigerator, and the low-temperature external branch pipe can control the temperature, flow rate and other parameters of the liquid flowing through the cold end heat sink 32. The variable frequency refrigerator includes an evaporator 241, a variable frequency compressor 242, a condenser 243, and a throttle valve 244.

[0063] In the present invention, the heat source device 1 is connected to the hot end heat sink 31 of the power generation device 3 at its inlet and outlet to form a hot water circuit, and the cold source device 2 is connected to the cold end heat sink 32 of the power generation device 3 at its inlet and outlet to form a cold water circuit. The thermoelectric module in the power generation device 3 converts thermal energy into electrical energy by using the temperature difference between the hot end heat sink 31 and the cold end heat sink 32. Figure 3 As shown in the figure, the thick solid line represents two circuits, which are divided into a water circuit (lower) and a heating circuit (upper). Figure 4 The thick solid line forms two circuits, which are divided into a water circuit (lower) and a refrigeration circuit (upper). For the cold source device 2, Figure 4 As shown, the solid lines in the figure represent two circuits, which are divided into a water circuit (lower) and a refrigeration circuit (upper).

[0064] The heat source device 1 of the present invention is used to accurately control the heat source water supply temperature and flow rate, and regulate the temperature of the hot end heat sink 31; correspondingly, the cold source device 2 is used to accurately control the cold source water supply temperature and flow rate, and regulate the temperature of the cold end heat sink 32.

[0065] In the cold source device 2, the refrigeration circuit is the same as the refrigeration principle of the household variable frequency air conditioner, except that the cold is transferred into water instead of air in this patent. Specifically, the organic working medium absorbs the heat in the water in the evaporator 241 and evaporates for cooling, and the steam coming out is compressed into high-pressure steam by the variable frequency compressor 242. The high-pressure steam releases the heat to the outdoor air in the condenser 243 and condenses, and the liquid coming out is depressurized by the throttle valve 244 and returns to the evaporator 241. The organic working medium is a household variable frequency air conditioner refrigerant, such as R410A, R134A, etc.

[0066] The throttle valve 244 is an electronic expansion valve, which is used for reducing the pressure and regulating the flow of the organic working fluid and is controlled by the cold source controller 29 without manual control.

[0067] Preferably, the temperature measuring device 5 comprises: a plurality of thermocouples 51 and a hub 52 connected to the thermocouples 51; the thermocouples 51 are arranged at the temperature measuring points reserved for the ceramic plate 332. The temperature measuring device 5 is used to measure the temperature distribution at both ends of the thermoelectric module and transmit the temperature parameter signal to the centralized control device 7.

[0068] Specifically, the ceramic plate 332 is provided with a plurality of temperature measuring points, and the temperature measuring device 5 includes a plurality of thermocouples 51 correspondingly, which measure the temperature of each temperature measuring point on the ceramic plate 332. The number of the thermocouples is related to the experimental design requirements, and preferably, the number of the thermocouples is 2-50.

[0069] Preferably, the electrical testing device 6 includes: a power meter connected to the power output terminal of the power generation device 3. The electrical testing device 6 is used to measure the electrical output characteristics of the power generation device 3 under different loads, including voltage, current and power. Specifically, the electrical testing device 6 is connected to the power output terminal of the power generation device 3 through a wire, measures electrical parameters such as voltage, current and power, and transmits the electrical parameter signal to the centralized control device 7.

[0070] Preferably, the centralized control device 7 includes a NI data collector 71 and a display 72. The centralized control device 7 is used to control and display the temperature and flow of the heat source and the cold source, calculate (analyze) and display the heat transfer and power generation efficiency, and display the temperature pressure and output voltage, current and power of the power generation device 3. The NI data collector 71 is a server with data collection and output functions.

[0071] The power supply device 8 of the present invention supplies power to the heat source device 1, the cold source device 2, the pressure measuring device 4 and the centralized control device 7. Specifically, the power supply device 8 includes a main distribution cabinet 81 and a DC power supply 82. Preferably, the main distribution cabinet 81 supplies power to the DC power supply 82, and the DC power supply 82 supplies power to the differential pressure transmitter 41. The main distribution cabinet 81 supplies power to the heat source distribution box 18 and the cold source distribution box 28, and the heat source distribution box 18 and the cold source distribution box 28 supply power to other devices in the heat source device 1 and the cold source device 2, respectively. The main distribution cabinet 81 supplies power to the NI data collector 71 and the display 72.

[0072] Example 1

[0073] An experimental tester for thermovoltaic power generation includes a heat source device 1, a cold source device 2, a power generation device 3, a pressure measuring device 4, a temperature measuring device 5, an electrical testing device 6, a centralized control device 7 and a power supply device 8. The heat source device 1 is connected to the inlet and outlet of the hot end heat sink 31 of the power generation device 3 to form a hot water circuit, and the cold source device 2 is connected to the inlet and outlet of the cold end heat sink 32 of the power generation device 3 to form a cold water circuit. The thermoelectric module in the power generation device 3 converts thermal energy into electrical energy by using the temperature difference between the hot end heat sink 31 and the cold end heat sink 32. The differential pressure transmitter 41 in the pressure measuring device 4 is connected to the pressure measuring holes 311 / 312 at the inlet and outlet of the hot end heat sink 31, and can measure the pressure difference between the inlet and outlet of the hot end heat sink 31, and transmit the pressure difference signal to the centralized control device 7. The temperature measuring device 5 includes 20 thermocouples 51, and the temperature measuring points of the thermocouples 51 are distributed on the ceramic plates 332 at both ends of the thermoelectric module, and transmit the temperature signal to the centralized control device 7. The electrical testing device 6 is connected to the power output terminal of the power generation device 3, measures electrical parameters such as voltage, current and power, and transmits the electrical parameter signal to the centralized control device 7. The power supply device 8 supplies power to the heat source device 1, the cold source device 2, the pressure measuring device 4 and the centralized control device 7.

[0074] In the heat source device: one end of the high-temperature variable frequency pump 12 is connected to the heat source water tank 11 to provide power for the entire hot water cycle, and the other end is divided into a high-temperature internal branch and a high-temperature external branch. The high-temperature internal branch is connected to the first high-temperature electric valve 13 and the variable frequency heater 14 in sequence and then returns to the heat source water tank 11. The high-temperature external branch is connected to the second high-temperature electric valve 15, the heat source flow meter 16 and the heat source thermometer 17 in sequence and then enters the hot end heat sink 31. The heat source controller (Siemens PLC CPU kit 6AV6651-7HA01-3AA4 type) 19 receives the flow measurement value of the heat source flow meter 16, runs the built-in program, controls the speed of the high-temperature variable frequency pump 12 and the opening of the first high-temperature electric valve 13 and the second high-temperature electric valve 15, so that the heat source water supply flow is close to the flow setting value of the user centralized control device 7. The heat source controller 19 receives the temperature measurement value of the heat source thermometer 17 , runs the built-in program, and controls the heating power of the variable frequency heater 14 so that the heat source water supply temperature is close to the temperature setting value of the user centralized control device 7 .

[0075] In the cold source device 2: one end of the low-temperature variable frequency pump 22 is connected to the cold source water tank 21 to provide power for the entire cold water cycle, and the other end is divided into a low-temperature internal branch and a low-temperature external branch. The low-temperature internal branch is connected to the first low-temperature electric valve 23 and the evaporator 241 in sequence and then returns to the cold source water tank 21, and the low-temperature external branch is connected to the second low-temperature electric valve 25, the cold source flow meter 16 and the cold source thermometer 27 in sequence and then enters the cold end heat sink 32. The cold source controller 29 receives the flow measurement value of the cold source flow meter 16, runs the built-in program, controls the speed of the low-temperature variable frequency pump 22 and the opening of the first low-temperature electric valve 23 and the second low-temperature electric valve 25, so that the cold source water supply flow is close to the flow setting value of the user centralized control device 7. The variable frequency refrigerator includes an evaporator 241, a variable frequency compressor 242, a condenser 243 and a throttle valve 244. The organic working fluid (R410A) absorbs heat from the water from the evaporator 241 through a refrigeration cycle. The cold source controller 29 receives the temperature measurement value of the cold source thermometer 27 , runs the built-in program, and controls the cooling capacity of the variable frequency refrigerator to make the cold source water supply temperature close to the temperature setting value of the user centralized control device 7 .

[0076] The power generation device 3 comprises a hot end heat sink 31, a cold end heat sink 32, a thermoelectric module and a fixing device 34. Pressure measuring holes 311 / 312 are reserved at the inlet and outlet of the hot end heat sink 31, and temperature measuring points are arranged on the ceramic plate 332 of the thermoelectric module.

[0077] The pressure measuring device 4 is composed of a differential pressure transmitter 41. The differential pressure transmitter 41 is connected to the pressure measuring holes 311 / 312 at the inlet and outlet of the hot end heat sink 31, and transmits the measured pressure to the centralized control device 7 for display through an electrical signal.

[0078] The temperature measuring device 5 includes 20 thermocouples 51 and a concentrator 52. The thermocouples 51 are distributed on the temperature measuring points reserved on the ceramic plate 332 of the thermoelectric module, and the electrical signal is transmitted to the centralized control device 7 for display after passing through the concentrator 52.

[0079] The electrical testing device 6 is composed of a power meter 61. The power meter 61 is connected to the power output terminal of the power generation device 3. By changing the internal resistance of the power meter 61, the voltage, current and power output by the power generation device 3 under different loads can be measured, and the measured parameters are transmitted to the centralized control device 7 for display.

[0080] The centralized control device 7 includes a NI data collector 71 and a display 72. The NI data collector 71 is connected to the heat source controller 19 and the cold source controller 29, and the heat source controller 19 and the cold source controller 29 respectively control the water supply temperature and flow rate of the heat source device 1 and the cold source device 2. The NI data collector 71 can also receive the following signals: the water supply temperature and flow rate of the heat source device 1 and the cold source device 2, the pressure and pressure difference of the inlet and outlet of the hot end heat sink 31, the temperature at the temperature measuring points at both ends of the thermoelectric module, and the voltage, current and power measured by the power meter 61. The NI data collector 71 uses the above information to calculate the heat exchange and thermoelectric conversion efficiency of the hot end heat sink 31 and the cold end heat sink 32 and displays all the above measured and calculated parameters in the display 723.

[0081] The power supply device 8 includes a main distribution cabinet 81 and a DC power supply 82. The main distribution cabinet 81 supplies power to the DC power supply 82, and the DC power supply 82 supplies power to the differential pressure transmitter 41. The main distribution cabinet 81 supplies power to the heat source distribution box 18 and the cold source distribution box 28, and the heat source distribution box 18 and the cold source distribution box 28 supply power to other devices in the heat source device 1 and the cold source device 2, respectively. The main distribution cabinet 81 supplies power to the NI data collector 71 and the display 72.

[0082] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. An experimental tester for thermovoltaic power generation, characterized in that: include: A power generation device, the power generation device comprising: a hot end heat sink, a cold end heat sink, and a thermoelectric module disposed between the hot end heat sink and the cold end heat sink, wherein the thermoelectric module comprises a ceramic plate sandwiched between two sides of a thermoelectric material; A heat source device connected to the hot end heat sink; the heat source device comprises: a high temperature variable frequency pump, a heat source water tank connected to one end of the high temperature variable frequency pump through a pipeline, a first high temperature electric valve and a second high temperature electric valve connected to the other end of the high temperature variable frequency pump through pipelines, and a variable frequency heater connected to the first high temperature electric valve through a pipeline; the variable frequency heater is connected to the heat source water tank through a pipeline; the second high temperature electric valve is connected to the hot end heat sink through a pipeline, and the hot end heat sink is connected to the heat source water tank through a pipeline; A cold source device connected to the cold end heat sink; the cold source device comprises: a low temperature variable frequency pump, a cold source water tank connected to one end of the low temperature variable frequency pump, a first low temperature electric valve and a second low temperature electric valve respectively connected to the other end of the low temperature variable frequency pump through pipelines, and a variable frequency refrigerator connected to the first low temperature electric valve through a pipeline; the variable frequency refrigerator is connected to the cold source water tank through a pipeline; the second low temperature electric valve is connected to the cold end heat sink through a pipeline, and the cold end heat sink is connected to the cold source water tank through a pipeline; A pressure measuring device connected to the pressure measuring holes at the inlet and outlet of the hot end heat sink or the cold end heat sink; a temperature measuring device connected to the ceramic plate; an electrical testing device connected to the power output terminal of the power generating device; A centralized control device connected to the heat source device, the cold source device, the pressure measuring device, the temperature measuring device, and the electrical testing device for displaying, setting, and analyzing experimental parameters; A power supply device connected to the heat source device, the cold source device, the pressure measuring device, the electrical testing device, and the centralized control device respectively.

2. The experimental tester for thermovoltaic power generation according to claim 1, characterized in that: The hot end heat sink and the cold end heat sink are both a metal plate with a flow channel inside.

3. The experimental tester for thermovoltaic power generation according to claim 1, characterized in that: The temperature measuring device comprises: a plurality of thermocouples and a hub connected to the thermocouples; The thermocouple is connected to the temperature measuring points distributed on the ceramic plate.

4. The experimental tester for thermovoltaic power generation according to claim 1, characterized in that: The electrical testing device comprises: a power meter connected to the power output terminal of the power generation device.

5. The experimental tester for thermovoltaic power generation according to claim 1, characterized in that: The pressure measuring device comprises: a differential pressure transmitter connected to the pressure measuring holes at the inlet and outlet of the hot end heat sink.

6. The experimental tester for thermovoltaic power generation according to claim 1, characterized in that: The centralized control device includes a NI data collector and a display.

7. The experimental tester for thermovoltaic power generation according to claim 1, characterized in that: The power supply device includes a main distribution cabinet and a DC power supply.

8. The experimental tester for thermovoltaic power generation according to claim 3, characterized in that: The number of the thermocouples is 2-50.

Images