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, Y. Kim, Y. S. Chang, L. Nam

    Research output: Contribution to journalArticlepeer-review

    21 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

    Bibliographical note

    Funding Information:
    The authors would like to thank the Ministry of Science and Technology, South Korea, for the financial support by a grant from the Critical Technology 21 Project.

    Keywords

    • Drop-in
    • Measurement
    • Performance
    • R22
    • R407C
    • Refrigerant
    • Screw compressor
    • Substitute
    • Water chiller

    ASJC Scopus subject areas

    • Building and Construction
    • Mechanical Engineering

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