超临界二氧化碳制冷系统优化设计

Optimized Design of Supercritical Carbon Dioxide Refrigeration System

本文介绍了制冷系统常见的制冷剂,根据ODP\GWP等对比,结合蒙特利尔公约及船级社规范要求,最终确定长期有效的制冷剂为二氧化碳制冷剂;进一步介绍了二氧化碳制冷机组的工艺原理,在现有超临界二氧化碳工艺设计基础上,开展带膨胀机的超临界二氧化碳工艺仿真设计,最终带膨胀机的超临界二氧化碳系统较比传统二氧化碳系统能耗降低67 k W,制冷系统COP由1.13上升至2.13,制冷系统功耗减少约60%。

This paper introduces the common refrigerants in refrigeration system,according to the comparison of ODP\GWP and so on,combined with the requirements of Montreal Convention and Classification Society Code,the longterm effective refrigerant is finally determined as carbon dioxide refrigerant;it further introduces the process principle of carbon dioxide refrigeration unit,and carries out the simulation design of supercritical carbon dioxide process with an expander based on the existing supercritical carbon dioxide process design,and finally reduces energy consumption of 67kW compared with the traditional carbon dioxide system.Finally,the supercritical carbon dioxide system with expander reduces energy consumption by 67 kW compared with the traditional carbon dioxide system,the COP of the refrigeration system increases from 1.13 to 2.13,and the power consumption of the refrigeration system is reduced by about 60%.