【摘要】 随着人们对日常生活水平的要求日益提高，对冷库需求量不断增加，传统的制冷系统已不能满足市场的要求，为了对冷库的制冷性能进一步提高，解决制冷性能低和能耗大等问题。本实验采用制冷剂R410A，搭建了冷冻系统实验台，探究如何选择合理的电子膨胀阀过热度，使整个系统的能效达到最大化。研究结果表明：库内外环境温度分别是-18℃、32℃，压缩机转速为4000 r/min，库内外侧的最大风量分别是4480 m~3/h和8415 m~3/h，主阀与补气阀最合理的过热度应为6 K和25 K，此时系统制冷量达到5.05 kW，系统的COP与EER分别为1.81和1.42，系统性能相对稳定。更多还原

【Abstract】 With the increasing requirements of people’s daily living standards and the increasing demand for cold storage, the traditional refrigeration system can not meet the requirements of the market. In order to further improve the refrigeration performance of cold storage and solve the problems of low refrigeration performance and high energy consumption. This experiment uses refrigerant R410A to build a refrigeration system test-bed to explore how to select a reasonable superheat of the electronic expansion valve to maximize the energy efficiency of the whole system. The research results show that the ambient temperature inside and outside the warehouse is-18 ℃ and 32 ℃ respectively, the compressor speed is 4000R/min, the maximum air volume outside the warehouse is 4480 m~3/h and 8415 m~3/h respectively, and the most reasonable superheat of the main valve and make-up valve should be 6K and 25K. At this time, the refrigeration capacity of the system reaches 5.05kw, and the cop and EER of the system are 1.81 and 1.42 respectively. The performance of the system is relatively stable.更多还原