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分析了在压缩蒸汽制冷循环中增加液体制冷剂的过冷度后,对循环制冷性能的影响;综述了机械式过冷、依靠自身冷量过冷、冰蓄冷式过冷和基于热电原理的过冷四种过冷方式的研究现状。通过对比发现,这些过冷方式一方面以牺牲一部分制冷量来获得过冷,另一方面则是增加了能量的消耗,对整个系统而言并不一定能达到节能的目的。然而对于基于热电原理的过冷技术而言,热电元件结构简单、运行稳定,在很小的温差下,具有很高的制冷效率;但是其热端散热不佳,是制约其制冷效率低的主要原因,文中提出采用热管为其散热,保证热电元件在高效率下运行,可以达到节能的目的。
The effects of increasing the subcooling degree of liquid refrigerant on the performance of the recirculation refrigeration system after the refrigerant refrigeration cycle is analyzed are summarized. The mechanical subcooling, the overcooling of the subcooling capacity, The research status of four cold subcooling methods. By comparison, it is found that these overcooling methods can not only achieve the purpose of energy saving but also increase the energy consumption by sacrificing a part of the cooling capacity on the one hand and the energy consumption on the other hand. However, for the supercooling technology based on the thermoelectric theory, the thermoelectric element has the advantages of simple structure and stable operation, and has very high cooling efficiency under a small temperature difference; however, the poor heat dissipation at the hot end restricts the low efficiency of the thermoelectric element Reason, the paper proposed the use of heat pipe for its heat to ensure that the thermoelectric elements operating at high efficiency, energy saving can be achieved.