热管式半导体热电冷水机参数影响分析与性能优化

Analysis on Parameters and Performance Optimization of Heat Pipe-Cooled Thermoelectric Water-Chiller

利用热管具有高效的导热能力,而半导体制冷具有无噪音、环保、制冷迅速等独特的优点,提出了一种基于热管散热的半导体热电冷水机结构。基于有限时间热力学理论,考虑包括汤姆逊效应在内的各种内部效应,建立了详细的计算模型。分析了关键运行参数和设计参数对装置最优电流和最优性能的影响,并给出了协调最大制冷率和最大制冷系数的最优参数区间。优化结果表明:当温差为20K、电流为2.5A时,最大制冷率和最大制冷系数分别可达29.49W和1.47,相比于优化前,分别提升了55.3%和47.0%。

For the high-efficiency thermal conductivity of heat pipes and the unique advantages of thermoelectric cooling,such as noiselessness,environmental protection,and rapid cooling,a new structure of heat pipe-cooled thermoelectric water-chiller is proposed.Based on the finite-time thermodynamics theory and considering various thermoelectric effects including the Thomson effect,a detailed calculation model is established.The influence of key operating parameters and design parameters on the optimal current and optimal performance of the device is analyzed.And the optimal interval of the input current and the optimal interval for coordinating the maximum cooling load and the maximum coefficient of performance(COP)are given.The optimization results show that when the temperature difference is 20 K and the current is 2.5 A,the maximum cooling load and maximum COP are improved by 55.3%and 47.0%after optimization,reaching 29.49 W and 1.47,respectively.