Research on carbon dioxide transcritical refrigeration cycle with vortex tube

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Liu, Yefeng^1 ; Sun, Ying^1 ; Wang, Dongliang^1

University of Shanghai for Science AndTechnology, School of Energy and Power Engineering, Shanghai

200093, China^1

关键词: Discharge pressures;    Expansion valves;    Gas cooler outlets;    Irreversible loss;    Isentropic efficiency;    Outlet temperature;    Refrigeration system;    Transcritical refrigeration cycle;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/2/022010/pdf
DOI  :  10.1088/1755-1315/267/2/022010

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

A kind of carbon dioxide transcritical refrigeration cycle with vortex tube is proposed to replace traditional expansion valve to reduce the irreversible loss of the refrigeration system and improve its COP. The mathematic model of carbon dioxide transcritical refrigeration system is built to simulate the effect of the vortex tube performance on the COP. The results show that outlet temperature of gas cooler, the discharge pressure, cold mass fraction and isentropic efficiency of the vortex tube have significant effects on the COP improvement of the proposed system. COP increases with the increase of cold mass fraction, isentropic efficiency of the vortex tube and the gas cooler outlet temperature. However, COP decreases with the increase of the discharge pressure. When the cold mass fraction is 0.8, the COP improvement increases by 12%.