Research On Thermoelectric Technology Of Thermoelectric Generation For Automobile Engine Waste Heat

Combustion engine as the car the traditional sources of power, thermal efficiency is always low, up to about40%of the heat taken away by the exhaust thermal energy is a potential exhaust heat energy recovery and utilization technologies.This paper focuses on the automotive engine exhaust waste heat thermoelectric power generation devices to carry out related work, the thermoelectric performance thermoelectric power generation device simulation of the hot end and the temperature field simulation, thermal stress analysis, model analysis and structural optimization of the formation of the following results:(1)A thermoelectric power generation is development. On the basis of numerical simulation of fluid-solid conjugate heat transfer on the hot side gas tank of the thermoelectric power generation device, an evaluation of flat-plate thermal energy device surface temperature uniformity index-temperature uniformity coefficient is proposed. With this evaluation target, the uniformity of the gas tank on the hot end temperature field can provide a theoretical basis for topological structure of the thermoelectric modular. The unmatch of the thermoelectric power generation and topological structure of the thermoelectric modular can be solved, the efficiency of the thermoelectric power generation is improved too.(2)With the simulation software of GT-Power and Matlab, in the establishment of an integrated model of the one-dimensional equivalent model of the gas tank of the hot side of thermoelectric power generation device and the engine, the model of one-dimensional equivalent of the cold-side water tank and the engine cooling system and an integrated model, computational model of the power generation performance and vehicle on the basis of the integrated model. And the influence on dynamics and economics of the engine that brought by the introduction of the cold-side water tank is well solved.(3)Finite element software systems analysis of thermal stress and the mode of thermoelectric power generation device as a whole, the hot end of the air box and cold side tanks. Aiming at the large deformation, vibration and noise, the structure improvement is done with the result of the simulation. In some extent, the problem of the deformation, vibration and noise is solved. And with the good contact of the modular of the generation, the efficiency of the thermoelectric power generation is improved.(4)Establishment of the hot end of the test platform of the thermoelectric power generation device, and the hot end of the trial design, combined with experimental data for verification, simulation and test results on the uniformity coefficient and the average temperature of the surface temperature of the hot end of the gas tank, indicating that the numerical simulation of the hot gas box correctness.