Construction And Measurement Of Property Testing System For Flat-plate Thermoelectric Generators

With the driving force of the demand for thermoelectric generators in various fields and industries,related research practices have become a hot spot and further developed.So far,the testing devices and methods available on the market have been limited to the physical and chemical property testing of thermoelectric materials,while the thermoelectric property testing of thermoelectric generators faces many challenges.Given the diverse configurations of thermoelectric generators in practical applications,this thesis chooses the most widelyused flat-plate thermoelectric generator as the research object,and constructs a thermoelectric generator property testing system for comprehensive measurement.The test results can evaluate the property of thermoelectric generators and provide effective guidance for property optimization.The main research work of this thesis is as follows:1.The basic effect,structural characteristics,working mechanism,and calculation of property parameters of thermoelectric generators were studied.This thesis compared different property parameter testing methods and selected the Seebeck effect testing method as the research method for this system.2.Designed and constructed a thermoelectric generator property testing device,and provided a detailed introduction to the selection of various hardware devices and the design of the testing device hardware circuit.Among them,the test bench structure adopted a stacked architecture,which is convenient for fixing the thermoelectric generator samples and integrating the property parameters testing.In addition,the testing device was set in a relatively independent vacuum environment,and the maximum temperature control of the sample’s hot end heating was 300℃,and samples of different sizes could be tested for property in this device.3.Designed thermoelectric generator property testing software,which could set the experimental temperature and monitor the experimental process in real-time.When the system reaches thermal stability,automatic testing and storage of property parameters such as Seebeck voltage,internal resistance,Seebeck coefficient,maximum output power,and maximum conversion efficiency could be achieved.4.Used the same batch of TEHP1-12370 H high-temperature-resistant flat-plate thermoelectric generators for testing experiments.The results showed that the property parameters measured by this system conformed to the reference value range of the factory property parameters,verifying that the constructed testing device had strong repeatability.Finally,the experimental data was analyzed for errors,and corresponding research methods for reducing testing errors are proposed.