Matching design and optimization of thermoelectric generation system applied in range-extended electric vehicle
To enhance the fuel efficiency of range-extended electric vehicle,the matching design and optimization of thermoelectric generation(TEG)system were conducted for three different displacements of range-extended engines.A finite element numerical model of TEG system was established,and a three-dimensional structure optimization method in the longitudinal,transverse,and vertical directions was proposed.The optimal matching structures of TEG system were obtained for different displacements,maximizing the net output power of TEG system without exceeding the critical temperature for thermoelectric material.Simulation results indicate that the number of thermoelectric module(TEM)in the longitudinal direction,the number of TEM in the transverse direction,and the vertical height of the heat exchanger significantly affect the temperature distribution,pressure distribution,and voltage distribution of the TEG system to varying degrees.Increasing the number of longitudinal and transverse TEM raises the output voltage but also leads to an increase in parasitic losses,resulting in decreased net output power when excessive.Moreover,as the engine displacement increases,the optimal structure matches a greater number of longitudinal TEM and vertical height.
range-extended electric vehiclethermoelectric generationnumerical optimizationnet output powerfuel efficiency
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