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On optimum disposal of waste heat

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  • Pau-Chang, Lu

Abstract

The irreversibility associated with waste heat disposal across an exchanger represents an inherent trade-off point in the design of power plants. On the one hand, a large degree of irreversibility from a large temperature drop across the heat-transfer surface is detrimental to the thermodynamic efficiency of a cycle that produces waste heat. On the other hand, reduction of irreversibility can be achieved only by employing a larger heat transfer area. Therefore, one expects that there must be an optimum design that maximizes the work output per unit of heat transfer area for a given cycle. The efficiency at this optimum condition should be much closer to efficiencies in comparable cases of “good” design, and it must serve as a much more reasonable yardstick in assesing engineering merit.

Suggested Citation

  • Pau-Chang, Lu, 1980. "On optimum disposal of waste heat," Energy, Elsevier, vol. 5(8), pages 993-998.
    • Handle: RePEc:eee:energy:v:5:y:1980:i:8:p:993-998
    DOI: 10.1016/0360-5442(80)90116-4
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