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应用有限时间热力学理论,基于熵产最小法,对热电制冷系统随有限温度的变化、由外部热源与内部工质之间的温差而形成的热漏及内部耗散所产生的传热不可逆性进行了最优化研究,建立了不可逆热电制冷循环模型。研究结果表明,不同的参数对热电制冷系统的影响有着显著的区别。本文推导出熵产率最小时对应的优化性能特性关系和重要设计参数的最佳值;绘出了相关优化性能曲线并说明了这些参数在总体和优化性能中的作用。计算结果对实际热电制冷系统优化条件的确定具有一定参考价值。
Based on the theory of finite-time thermodynamics, based on the entropy generation minimization method, the heat leakage caused by the temperature difference between the external heat source and the internal working fluid and the heat transfer irreversibility caused by the internal dissipation of the thermoelectric cooling system with the finite temperature change The optimization research, established a non-reversible thermoelectric refrigeration cycle model. The results show that different parameters have significant differences on the thermoelectric refrigeration system. In this paper, we derive the relationship between the optimal performance characteristics and the optimal design parameters when the entropy yield is the minimum, plot the related optimization performance curves and illustrate the function of these parameters in overall and optimization performance. The calculation results have certain reference value for the determination of optimization conditions of the actual thermoelectric cooling system.