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An exergy-based study on the relationship between costs and environmental impacts in power plants

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  • Lara, Yolanda
  • Petrakopoulou, Fontina
  • Morosuk, Tatiana
  • Boyano, Alicia
  • Tsatsaronis, George

Abstract

Exergy-based (exergetic, exergoeconomic and exergoenvironmental) analyses, are used for designing, assessing and improving energy conversion systems. In an exergoeconomic analysis, thermodynamic inefficiencies – represented by exergy destruction – are used in combination with investment costs to calculate the “cost-optimal” layout of a plant. Analogously, in an exergoenvironmental analysis, the aim is to minimize the total environmental impact of a plant. Until today exergoeconomic and exergoenvironmental analyses have been used as separate and distinct tools and the improvement of a plant has been considered in terms of the reduction of either costs or environmental impact. To simultaneously decrease the investment costs and the component-related (manufacturing or construction-related) environmental impacts, their relationship with exergy destruction must be studied in parallel. This paper examines the relationship between exergoeconomic and exergoenvironmental data under various plant operating conditions. A combined-cycle power plant is analyzed and options for a simultaneous improvement from the thermodynamic, economic and environmental viewpoints are discussed.

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  • Lara, Yolanda & Petrakopoulou, Fontina & Morosuk, Tatiana & Boyano, Alicia & Tsatsaronis, George, 2017. "An exergy-based study on the relationship between costs and environmental impacts in power plants," Energy, Elsevier, vol. 138(C), pages 920-928.
    • Handle: RePEc:eee:energy:v:138:y:2017:i:c:p:920-928
    DOI: 10.1016/j.energy.2017.07.087
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    References listed on IDEAS

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