Research On Characteristics Of Thermoelectric Energy Collection And Conversion System Based On Seebeck Effect

With the increasing consumption of energy,energy issues have become a common problem hindering the development of all countries in the world.Under the above background,the thermoelectric energy collection and conversion technology in the field of energy conversion has become a research hotspot.This paper studies the Seebeck effect-based thermoelectric energy collection and conversion model and system under multiple cooling modes,and lays the foundation for the design and optimization of the thermoelectric energy collection and conversion system under multiple cooling modes.The above research has a positive impact on reducing the internal thermal energy loss in the energy harvesting and conversion system,and improving the thermoelectric conversion efficiency and output power.The research content and results of this article are as follows:1.This paper studies the Seebeck effect-based thermoelectric energy collection and conversion model in multiple cooling modes.This model studies the effects of input heat source surface temperature,heat dissipation end surface temperature,and load ratio on the output voltage,power,and internal thermal energy loss of the system under the air-cooling and water-cooling heat dissipation methods.2.The output characteristics of the thermoelectric energy acquisition and conversion model under multiple cooling modes are analyzed.Through air-cooled and water-cooled heat dissipation,the output voltage,power and input heat source surface temperature,heat dissipation end surface temperature and load ratio of the thermoelectric energy harvesting and conversion system are studied,and the output characteristics of the system under different heat sources and heat dissipation methods are obtained.3.Designed the thermoelectric energy collection and conversion system.Through the design of air-cooled and water-cooled heat dissipation structures,the heat dissipation performance of the system is improved.Two heat sources,photothermal and electric heating,are used to conduct experiments on thermoelectric energy collection and conversion systems with different heat dissipation,so as to realize the effective collection and conversion of thermoelectric energy under different heat sources and heat dissipation conditions.4.Test the air-cooled and liquid-cooled thermoelectric energy collection and conversion system under the conditions of two heat sources: photothermal and electric heating,and analyze the stability and output characteristics of the system.After testing,the peak output voltage and power of the thermoelectric converter with a large channel water-cooled heat conduction radiator,a small channel water-cooled heat conduction radiator,an aluminum fish-scale short-piece air-cooled heat conduction radiator and an air-air-cooled heat conduction radiator are 370.4,337.9,270.2 and 183.1m V and 137.2,114.2,73.0 and 33.5 m W.5.For water-cooled heat dissipation,in terms of output power and voltage,the thermoelectric converters of large-channel water-cooled heat-conducting radiators have increased by 20.14% and9.62% compared to small-channel water-cooled heat-conducting radiators;for air-cooled heat dissipation,aluminum fish-scale short pieces of air-cooled heat conduction heat dissipation Compared with the air-cooled heat conduction radiator,the output power of the thermoelectric converter of the air-cooled heat transfer radiator is increased by 117.91%,and the output voltage is increased by 47.57%.6.The internal thermal energy recovery and utilization of the system in the process of thermoelectric energy acquisition and conversion is realized,providing a new strategy for energy recycling.The heat energy recovery device reduces the heat energy loss while recycling the heat energy to improve the thermoelectric conversion efficiency of the system.The effectiveness of the thermal energy recovery device is verified by comparing the test of the system with and without the thermal energy recovery device.7.When the voltage across the Thermal Electric Cooler(TEC)is 5 V,the output voltage and current of the system including the heat recovery device are increased by 37.49% and 33.52%,respectively,compared with the system without the heat recovery device;when the voltage across the TEC is 4 V,the heat energy is included The output voltage and current of the system with the recuperator are increased by 49.15% and 43.26%,respectively,compared with the system without the thermal energy recuperator.