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Optimization of Irreversible Cogeneration Systems under Alternative Performance Criteria

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Abstract

In this study, an exergy optimization has been performed for a cogeneration plant consisting of an irreversible Carnot heat engine. In the analysis, different objective functions have been defined based on alternative performance criteria and the optimum values of the design parameters of a cogeneration cycle were determined for different criteria. In this context, the effects of irreversibilities on the exergetic performance are investigated, and the results are discussed.

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Abbreviations

\({\dot{E}}\) :

Exergy rate

\({\dot{Q}}\) :

Rate of heat transfer

I :

Irreversibility parameter

R :

Power to process heat ratio

S :

Entropy

T :

Temperature

\({\dot{W}}\) :

Power generated from the cogeneration system

α, β, γ :

Thermal conductances in the heat source heat sink and heat consumer sides, respectively

η :

Efficiency

\({\phi}\) :

Ratio of heat-source to heat-sink temperature

Ψ:

Ratio of heat-consumer to heat-sink temperature

H:

Heat source

L:

Heat sink

K:

Heat consumer

max:

Maximum

X:

Warm working fluid

Y:

Cold working fluid

Z:

Process working fluid

T:

Total

–:

Dimensionless

*:

Optimum

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Authors and Affiliations

  1. Department of Mechanical Education, Marmara University, Ziverbey, Istanbul, 34722, Turkey

    M. Atmaca, M. Gumus & A. T. Inan

  2. Department of Naval Architecture and Marine Engineering, Yildiz Technical University, Besiktas, Istanbul, 34349, Turkey

    T. Yilmaz

Authors
  1. M. Atmaca
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  2. M. Gumus
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  3. A. T. Inan
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  4. T. Yilmaz
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Correspondence to M. Atmaca.

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Atmaca, M., Gumus, M., Inan, A.T. et al. Optimization of Irreversible Cogeneration Systems under Alternative Performance Criteria. Int J Thermophys 30, 1724–1732 (2009). https://doi.org/10.1007/s10765-009-0621-3

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  • DOI: https://doi.org/10.1007/s10765-009-0621-3

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