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Thermodynamic analyses of the CFC-12 and HFC-134a refrigeration cycles

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  • Khan, Shamsul Hoda
  • Zubair, Syed M.

Abstract

Dichlorodifluoromethane (CFC-12) is the major contributor to ozone depletion. The new refrigerant tetrafluorethane (HFC-134a), which is a leading candidate to replace CFC-12 in refrigeration and air-conditioning applications, has been investigated from the standpoint of thermodynamic performance. For this purpose, a computer program is written to calculate the thermodynamic properties of HFC-134a, which can be used as a reference for analyses. A comparison has also been made for CFC-12 and HFC-134a refrigerants, which indicates that CFC-12 may be replaced by HFC-134a without a significant loss in overall thermal performance. It is found that the volumetric refrigerating effect of HFC-134a is less than that of CFC-12 for the same operating conditions. Thus, a larger compressor will be required for the same refrigeration capacity with HFC-134a.

Suggested Citation

  • Khan, Shamsul Hoda & Zubair, Syed M., 1993. "Thermodynamic analyses of the CFC-12 and HFC-134a refrigeration cycles," Energy, Elsevier, vol. 18(7), pages 717-726.
    • Handle: RePEc:eee:energy:v:18:y:1993:i:7:p:717-726
    DOI: 10.1016/0360-5442(93)90031-8
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    Cited by:

    1. Mendoza-Miranda, J.M. & Mota-Babiloni, A. & Ramírez-Minguela, J.J. & Muñoz-Carpio, V.D. & Carrera-Rodríguez, M. & Navarro-Esbrí, J. & Salazar-Hernández, C., 2016. "Comparative evaluation of R1234yf, R1234ze(E) and R450A as alternatives to R134a in a variable speed reciprocating compressor," Energy, Elsevier, vol. 114(C), pages 753-766.
    2. Yaqub, M & M. Zubair, Syed & Khan, Jameel-ur-Rehman, 2000. "Performance evaluation of hot-gas by-pass capacity control schemes for refrigeration and air-conditioning systems," Energy, Elsevier, vol. 25(6), pages 543-561.

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