Thermodynamic Comparison between Thermoelectric Refrigerator and Compression Ones

The thermodynamic properties were compared between thermoelectric refrigerator and compression ones. The irreversible losses of a thermoelectric refrigerating system represent the typical losses of general two-source refrigerating system. Its finite heat transfer, Joule heat and Fourier heat are respectively corresponding to the irreversible heat transfer, friction and heat leak of compressing refrigerating system. COPs varying with refrigerating capacity are qualitatively alike between a thermoelectric refrigerator and a compression one. The optimum working spot should be (εq)_max, namely, the product of refrigerating coefficient and capacity should be maximum.