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Investigating the effect of several thermodynamic parameters on exergy destruction in components of a tri-generation cycle

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  • Salehzadeh, A.
  • Khoshbakhti Saray, R.
  • JalaliVahid, D.

Abstract

Multiple energy generating cycles such as tri-generation cycles, which produce heat and cold in addition to power through burning of a primary fuel, have increasingly been used in recent decades. On the other hand, advanced exergy analysis of thermodynamic systems by splitting exergy destruction into endogenous and exogenous parts identifies internal irreversibilities of each of the components and the effect of these irreversibilities on the performance of other components. Therefore, main sources of exergy destruction in cycles can be highlighted and useful recommendations in order to improve the performance of thermodynamic cycles can be presented. In the present work, a tri-generation cycle with 100 MW power production, 70 MW heat and 9 MW cooling capacity is considered. For this tri-generation cycle, effects of various thermodynamic parameters on the amount of endogenous and exogenous exergy destructions, exergy loss and the amount of fuel consumption, are investigated. The results indicate that, increasing compressor pressure ratio, pre-heater outlet temperature and excess air leads to better combustion and lower exergy loss and fuel consumption. Increasing the mass flow rate of steam generator, while keeping the cycle outlet temperature constant and considering cooling capacity variable, lead to increase the first- and second-law efficiencies of the cycle.

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  • Salehzadeh, A. & Khoshbakhti Saray, R. & JalaliVahid, D., 2013. "Investigating the effect of several thermodynamic parameters on exergy destruction in components of a tri-generation cycle," Energy, Elsevier, vol. 52(C), pages 96-109.
  • Handle: RePEc:eee:energy:v:52:y:2013:i:c:p:96-109
    DOI: 10.1016/j.energy.2013.01.007
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    References listed on IDEAS

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    Cited by:

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    4. Caliskan, Hakan & Açıkkalp, Emin & Rostamnejad Takleh, H. & Zare, V., 2023. "Advanced, extended and combined extended-advanced exergy analyses of a novel geothermal powered combined cooling, heating and power (CCHP) system," Renewable Energy, Elsevier, vol. 206(C), pages 125-134.
    5. Usón, Sergio & Kostowski, Wojciech J. & Stanek, Wojciech & Gazda, Wiesław, 2015. "Thermoecological cost of electricity, heat and cold generated in a trigeneration module fuelled with selected fossil and renewable fuels," Energy, Elsevier, vol. 92(P3), pages 308-319.
    6. Anvari, Simin & Khoshbakhti Saray, Rahim & Bahlouli, Keyvan, 2015. "Conventional and advanced exergetic and exergoeconomic analyses applied to a tri-generation cycle for heat, cold and power production," Energy, Elsevier, vol. 91(C), pages 925-939.
    7. Cheng, XueTao, 2013. "Entropy resistance minimization: An alternative method for heat exchanger analyses," Energy, Elsevier, vol. 58(C), pages 672-678.
    8. Janghorban Esfahani, I. & Yoo, C.K., 2013. "Exergy analysis and parametric optimization of three power and fresh water cogeneration systems using refrigeration chillers," Energy, Elsevier, vol. 59(C), pages 340-355.

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