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B5: Energy system design and optimization
Based on Computational Fluid Dynamics, this paper presents a numerical model to analyse the inside flow field distribution in the heat exchanger applied for Automotive Thermoelectric Generator (ATEG). The model simulates the influence of relevant factors to the heat exchanger, including automotive waste heat mass flow rate, temperture, internal fin distribution and back pressure. It was concluded that heat mass flow rate played a major role in back pressure growth and proper fin structure was conducive to heat transfer and temperture uniformity.The result was in good agreement (within 5%) with the experimental test data. Finally, attempted at inner flow field improvements, a more rational structure was obtained with better temperature uniformity and back pressure.
