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Optimization of Irreversible Cogeneration Systems under Alternative Performance Criteria

  • M. Atmaca
  • M. Gumus
  • A. T. Inan
  • T. Yilmaz
Article

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.

Keywords

Cogeneration cycle Irreversible Carnot Performance criteria Performance optimization 

List of Symbols

\({\dot{E}}\)

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

Subscripts

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

Superscripts

Dimensionless

*

Optimum

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Department of Mechanical EducationMarmara UniversityIstanbulTurkey
  2. 2.Department of Naval Architecture and Marine EngineeringYildiz Technical UniversityIstanbulTurkey

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