Research On Output Power And Conversion Efficiency Of Thermoelectric Generation For Vehicle Exhausts Waste Heat

For now, the process of electric car technology is gradually developing, electrical equipments covers more and more applications of vehicles. Because of which, the demand of electricity supply keep rising. However, the system that product electricity power by vehicles is inefficient, which makes a great waste of energy. Under the current situation, combine the thermoelectric power generation technology with the recovery of automobile exhaust waste heat, which convert the automobile exhaust waste heat to electricity power and store it is a reliable solution.Firstly, this article discuss the details of a few basic theory of thermoelectric power generation, describe the main components of the thermoelectric power generating device on the vehicle, compare the geometry and parameters of three kinds of thermoelectric typical automotive exhaust heat power generation units, briefly introduce the advantages and disadvantages of flatbed, cylindrical and finned thermoelectric power generator. In addition, by analyzing the efficient of the whole power system, obtain results that absorbs heat exchanger efficiency and conversion efficiency of a thermoelectric power generation units are the key points which affect the whole efficiency.Secondly, through the analysis of the thermocouple, deduced mathematical theory of generation components and the overall power output of thermoelectric conversion efficiency. Analyzing the generation component resistance, external load resistance, as well as thermoelectric power generation element cross-sectional area ratio of its length by using the MATLAB method. Besides, gives the conclusion of how they impact the main performance parameters of thermoelectric power generation module. Though the match analyzing of the main performance parameters of the output power and conversion efficiency of thermoelectric power generation components to obtain the best interval of resistance ratio and surface long ratio.Moreover, for getting a new structure size of thermoelectric power generation components, which achieve optimal output power and efficient thermoelectric conversion value under the situation that it runs reliable, it is necessary to stimulate temperature distribution and stress distribution as well as thermal, electrical, structural coupling of single. Besides, considering about the impact of change the physical properties and contact effect of thermoelectric elements either. Finally, carry out mechanism analysis of thermal technology for strengthening. In this section, setting calculation model and boundary conditions then modeling meshing and fluent fluid numerical analysis for five different the internal structure heat exchangers, which obtain five different results. Comparing with each other, reverse fishbone is chosen as the finally decision. For the overall structure of thermoelectric power generation units, which mounted on the vehicles, using both water-cooled and air-cooled systems is a creative structure, which more effectively improve the cooling capacity of the thermoelectric power generation component modules. That is a new design of automobile exhaust waste heat thermoelectric generator.