Thermoeconomic isolation and essergy analysis

Robert B. Evans

Energy, 1980, vol. 5, issue 8, 804-821

Abstract: Any thermal system component may be regarded as “thermoeconomically isolated” from other system compondnts when its economic interactions are completely described by a set of single numerical values of stable Lagrange multipliers for each interaction. Thermoeconomic isolation in this sense is a necessary and sufficient condition in optimizing a component by itself, without determining the resulting economic impact on the rest of the system yet still allowing overall optimization of the system as a whole. For any multicomponent system with variable energy values, it appears that thermoeconomic isolation of each component can be achieved only by expressing interactions in terms of the quantity “essergy”, or essential, useful energy. Abbreviated examples of essergy analysis and optimization are given for feedwater heaters and condensers in power plants and evaporators and condensers in refrigeration systems.

Date: 1980
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Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:5:y:1980:i:8:p:804-821

DOI: 10.1016/0360-5442(80)90098-5

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