Experimental Investigation of Cooling Coefficient of Performance and Cooling Capacity in a Refrigerant System with Carbon Dioxide

Makoto Igarashi, Shogo Tamaki, Yuuko Fujii, Yohsuke Matsushita, Hideyuki Aoki, Takatoshi Miura, Koichiro Take, Hidemitsu Hamano

Research output: Contribution to journalArticle

Abstract

The performance of a refrigeration cycle with carbon dioxide was experimentally investigated. The effects of mass flow rate of carbon dioxide, higher side pressure and refrigerant mass on the cooling coefficient of performance, cooling capacity and compressor work were examined. Then cooling coefficient of performance decreased and cooling capacity increased with an increase in mass flow rate of carbon dioxide. The cooling coefficient of performance had maximum value at a gas cooler outlet pressure of around 8.3 MPa regardless of compressor speed. A higher cooling coefficient of performance will be obtained by controlling gas cooler outlet pressure. Furthermore, compressor work increased with an increase in gas cooler outlet pressure regardless of refrigerant mass. The cooling coefficient of performance and cooling capacity increased with an increase in refrigerant mass.

Original languageEnglish
Pages (from-to)566-570
Number of pages5
Journalkagaku kogaku ronbunshu
Volume34
Issue number6
DOIs
Publication statusPublished - 2008 Dec 1

Keywords

  • CO Refrigerant
  • Coefficient of Performance
  • Cooling Capacity
  • Refrigeration Cycle

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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