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Performance degradation of an air-conditioner caused by cyclic operations

Author

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  • Bahel, V.
  • Bakhsh, H.
  • Zubair, S.

Abstract

We have illustrated the effect of degradation in the seasonal coefficient of performance (COP) of an air-conditioner caused by cyclic operations. This degradation is demonstrated for a 100 m2 residence in Dhahran equipped with a 17.6 kW capacity central unit. A computer model simulates cooling loads and transient (start-up) losses. Simulations show that cyclic losses can be as high as 22% during months of low cooling. The system experienced little degradation during the peak cooling period. The annual steady-state energy consumption is 17,900 kWh; transient start-stop penalties required an additional 2100 kWh, which agrees within 5% with the annual metered consumption. Cyclic losses are significantly reduced with design changes that prevent refrigerant migration during the off-cycle period. The seasonal steady-state and cyclic COP values were found to be 2.11 and 1.88, respectively.

Suggested Citation

  • Bahel, V. & Bakhsh, H. & Zubair, S., 1988. "Performance degradation of an air-conditioner caused by cyclic operations," Energy, Elsevier, vol. 13(2), pages 191-195.
    • Handle: RePEc:eee:energy:v:13:y:1988:i:2:p:191-195
    DOI: 10.1016/0360-5442(88)90045-X
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