Analysis of a Cascade Refrigeration System (CRS) by Using Different Refrigerant Couples Based on the Exergetic Performance Coefficient (EPC) Criterion

ÜST Y., KARAKURT A. S.

ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING, vol.39, no.11, pp.8147-8156, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 39 Issue: 11
  • Publication Date: 2014
  • Doi Number: 10.1007/s13369-014-1335-9
  • Journal Name: ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Communication Abstracts, Metadex, Pollution Abstracts, zbMATH, Civil Engineering Abstracts
  • Page Numbers: pp.8147-8156
  • Keywords: Cascade refrigeration system, Thermodynamic cycle, Optimization, Performance analysis, ALTERNATIVE REFRIGERANT, THERMODYNAMIC ANALYSIS, CYCLE PERFORMANCE, TEMPERATURE, MIXTURE
  • Yıldız Technical University Affiliated: Yes

Abstract

A theoretical performance analysis based on the exergetic performance coefficient (EPC) criterion has been carried out for a cascade refrigeration system for different refrigerant couples. The EPC criterion is defined as the ratio of exergy output to the total exergy destruction rate (or loss rate of availability). According to the results of the study, the refrigerant couples R23-R717 show the best performance in terms of EPC and coefficient of performance from among the other refrigerant couples (R23-R290, R23-R404A, R23-R507A and R23-R717). In the analysis, R23 was used for the lower temperature cycle and the other refrigerants are used for the higher temperature cycle. The effects of the temperature difference in the cascade condenser and the evaporator and condenser temperature on the EPC, coefficient of performance and exergy destructions have been thoroughly investigated for the refrigerant couple R23-R717.