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

authors

  • LARA, YOLANDA
  • PETRAKOPOULOU, FOTEINI KONSTANTINA
  • MOROSUK, TATIANA
  • BOYANO, ALICIA
  • TSATSARONIS, GEORGE

published in

publication date

  • November 2017

start page

  • 920

end page

  • 928

volume

  • 138

international standard serial number (ISSN)

  • 0360-5442

electronic international standard serial number (EISSN)

  • 1873-6785

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. (C) 2017 Elsevier Ltd. All rights reserved.

keywords

  • exergy analysis; exergoeconomic analysis; exergoenvironmental analysis