Study on the Performance of Carbon Dioxide Trans-Critical Refrigeration Cycle with Vortex Tube Expansion

DOI

10.2991/iceep-18.2018.217How to use a DOI?

Keywords

Carbon dioxide; Trans-critical cycle; Vortex tube; COP

Abstract

In this paper, one carbon dioxide trans-critical refrigeration cycle with vortex tube expansion is proposed to replace traditional expansion valve in order to reduce the irreversible loss of the refrigeration system and improve its COP. The thermodynamic model of carbon dioxide trans-critical refrigeration system is built to simulate the effect of the vortex tube performance on the COP. The results show that the gas cooler outlet temperature and the discharge pressure have significant effects on the COP improvement of the vortex tube system. COP increases with the increase of the gas cooler outlet temperature and the decrease of the discharge pressure. When the gas cooler outlet temperature is 45℃ and evaporation temperature is 0℃, the COP increases 28% compared to traditional system with expansion valve. In addition, increasing the isentropic efficiency and the cold mass fraction of the vortex tube can also increase the COP by about 10%.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yefeng Liu
AU  - Ying Sun
PY  - 2018/09
DA  - 2018/09
TI  - Study on the Performance of Carbon Dioxide Trans-Critical Refrigeration Cycle with Vortex Tube Expansion
BT  - Proceedings of the 2018 7th International Conference on Energy and Environmental Protection (ICEEP 2018)
PB  - Atlantis Press
SP  - 1230
EP  - 1235
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceep-18.2018.217
DO  - 10.2991/iceep-18.2018.217
ID  - Liu2018/09
ER  -