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Long-term thermodynamic performance of solar heat and power systems

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  • Wijeysundera, N.E.
  • Ho, J.C.

Abstract

This paper describes a long-term simulation study of solar thermal systems incorporating second-law considerations. Both open-loop and closed-loop heat collecting configurations are simulated using hourly meteorological data. The entropy generation in each subcomponent is calculated on an hourly basis to obtain the yearly mean second-law efficiency. The effects of load temperature, mode of operation, collector type, collector area and storage tank size are investigated. Some results are presented for a solar-Rankine power plant using R-12 and R-22 as the working fluids. The use of the plate temperature as the [`]source' temperature gives an optimal collector size which maximizes the second-law efficiency. When the equivalent [`]sun' temperature is used, the second-law efficiency decreases with collector area for both types of heating system.

Suggested Citation

  • Wijeysundera, N.E. & Ho, J.C., 1986. "Long-term thermodynamic performance of solar heat and power systems," Applied Energy, Elsevier, vol. 24(1), pages 43-63.
    • Handle: RePEc:eee:appene:v:24:y:1986:i:1:p:43-63
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