Optimization at different loads by minimization of irreversibilities

Kau Fui V. Wong, Zhongsheng Niu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations


The irreversibility of the power cycle was chosen as the objective function as this function can successfully measure both the quality and quantity of energy flow in the cycle. Minimization of the irreversibility ensures that the power cycle will operate more efficiently. One feature of the present work is that the boiler, turbine, condenser and heaters are treated as one system for, the purpose of optimization. In the optimization model, nine regression formulae are used, which are obtained from the measured test data. From the results of the present work, it can be seen that the optimization model developed can represent the effect of operational parameters on the power plant first and second law efficiency. Some of the results can be used to provide guidance for the optimal operation of the power plant. When the power cycle works at full load, the main steam temperature and pressure should be at the upper limit for minimal irreversibility of the system. If the load is less than 65% of its design capacity, the steam temperature and pressure should be decreased for a lower irreversibility of the system.

Original languageEnglish (US)
Title of host publicationSecond Law Analysis - Industrial and Environmental Applications
PublisherPubl by ASME
Number of pages5
ISBN (Print)0791808688
StatePublished - Dec 1 1991
EventWinter Annual Meeting of the American Society of Mechanical Engineers - Atlanta, GA, USA
Duration: Dec 1 1991Dec 6 1991

Publication series

NameAmerican Society of Mechanical Engineers, Advanced Energy Systems Division (Publication) AES


ConferenceWinter Annual Meeting of the American Society of Mechanical Engineers
CityAtlanta, GA, USA

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Mechanical Engineering


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