Experimental investigation on the drop-in performance of R407C as a substitute for R22 in a screw chiller with shell-and-tube heat exchangers

D. Y. Lee, Y. Ahn, Y. Kim, Yong Chan Kim, Y. S. Chang, L. Nam

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

A drop-in test of a mixed refrigerant R407C is performed in a commercial screw chiller with shell-and-tube heat exchangers originally designed for R22. The test results show a severe performance reduction when substituting the refrigerant from R22 to R407C. The reason for the performance reduction is analyzed comprehensively, and the influence of thermodynamic properties, compressor efficiency, and heat transfer is evaluated quantitatively. The major factor causing the performance reduction is assessed as the degradation of the heat transfer in using the mixed refrigerant, R407C. The heat transfer degradation in the evaporator is found to be larger and influences more on the chiller performance reduction. The performance reduction caused by the evaporator is approximately two times compared with that of the condenser.

Original languageEnglish
Pages (from-to)575-585
Number of pages11
JournalInternational Journal of Refrigeration
Volume25
Issue number5
DOIs
Publication statusPublished - 2002 Aug 1

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heat exchangers
Tubes (components)
screws
heat transfer
evaporators
Hot Temperature
Refrigerants
condensers
compressors
Evaporators
Heat transfer
degradation
thermodynamics
Degradation
Thermodynamics
testing
Compressors
Thermodynamic properties

ASJC Scopus subject areas

  • Food Science
  • Mechanical Engineering

Cite this

Experimental investigation on the drop-in performance of R407C as a substitute for R22 in a screw chiller with shell-and-tube heat exchangers. / Lee, D. Y.; Ahn, Y.; Kim, Y.; Kim, Yong Chan; Chang, Y. S.; Nam, L.

In: International Journal of Refrigeration, Vol. 25, No. 5, 01.08.2002, p. 575-585.

Research output: Contribution to journalArticle

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