Entropy generation minimization: A practical approach for performance evaluation of temperature cascaded co-generation plants

Aung Myat, Kyaw Thu, Young Deuk Kim, Bidyut Baran Saha, Kim Choon Ng

    Research output: Contribution to journalArticlepeer-review

    25 Citations (Scopus)


    We present a practical tool that employs entropy generation minimization (EGM) approach for an in-depth performance evaluation of a co-generation plant with a temperature-cascaded concept. Co-generation plant produces useful effect production sequentially, i.e., (i) electricity from the micro-turbines, (ii) low pressure steam at 250 °C or about 8-10 bars, (iii) cooling capacity of 4 refrigeration tones (Rtons) and (iv) dehumidification of outdoor air for air conditioned space. The main objective is to configure the most efficient configuration of producing power and heat. We employed entropy generation minimization (EGM) which reflects to minimize the dissipative losses and maximize the cycle efficiency of the individual thermally activated systems. The minimization of dissipative losses or EGM is performed in two steps namely, (i) adjusting heat source temperatures for the heat-fired cycles and (ii) the use of Genetic Algorithm (GA), to seek out the sensitivity of heat transfer areas, flow rates of working fluids, inlet temperatures of heat sources and coolant, etc., over the anticipated range of operation to achieve maximum efficiency. With EGM equipped with GA, we verified that the local minimization of entropy generation individually at each of the heat-activated processes would lead to the maximum efficiency of the system.

    Original languageEnglish
    Pages (from-to)493-521
    Number of pages29
    Issue number1
    Publication statusPublished - Oct 2012

    All Science Journal Classification (ASJC) codes

    • General Energy
    • Mechanical Engineering
    • Pollution
    • Energy Engineering and Power Technology
    • Electrical and Electronic Engineering
    • Industrial and Manufacturing Engineering
    • Management, Monitoring, Policy and Law
    • Building and Construction
    • Fuel Technology
    • Renewable Energy, Sustainability and the Environment
    • Civil and Structural Engineering
    • Modelling and Simulation


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