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Fundamental Journal of Thermal Science and Engineering

ISSN: 2249-975X
Volume 1, Issue 2, 2011, Pages 73-105
 
A discussion of endoreversible engines at maximum output
Author(s): Gérard C. Nihous
Pages: 73-81
Received: October 26, 2011
 
Abstract
A well-known formula for the cycle efficiency of endoreversible (semi-ideal) engines at maximum power output was obtained by several authors using different approaches, but other results shown in these studies are not always in agreement. A brief review of this body of work suggests that the so-called finite-time thermodynamics approach, for which the value of maximum isentropic power remains indeterminate, is not consistent with engines operating at a constant mass flow rate of working fluid. Predictive formulas are further tested with a well documented and carefully instrumented experimental Ocean Thermal Energy Conversion (OTEC) plant. With small temperature differences, OTEC cycles can be well approximated as endoreversible engines. The accuracy and practicality of one set of formulas for working fluid temperatures and isentropic power is clearly demonstrated.



Keywords and phrases

endoreversible (semi-ideal) thermal engines, Ocean Thermal Energy Conversion (OTEC).

 
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