Exergoeconomic analysis of a combined solar-waste driven power plant

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26 Citations (Scopus)

Abstract

In this work, a thorough exergoeconomic analysis of a hybrid solar-waste driven power plant is presented. The objective is to give a clearer picture of the main irreversibilities, their corresponding costs and to find some effective yet feasible solutions to improve the efficiency and cost-effectiveness of the power plant. For this, the power plant is exergetically modeled, the exergoeconomic assessment is accomplished, the exergy losses are weighted, the cost of these losses are estimated and finally, the solutions are given. The cost of electricity was improved from 0.202 US$/MJ to 0.137 US$/MJ, after the application of the recommendations. Results show that electricity cost decreases in daily hours from a maximum of 10% in winter to the maximum of 26% in summer. Furthermore, the results of sensitivity analysis on the plant indicates that a hybrid cycle with turbine isentropic efficiency of 0.85, steam extraction ratio of 0.36 and inlet turbine temperature of 400 °C offers a 32% lower electricity cost compared to a cycle with a turbine isentropic efficiency of 0.75, steam extraction ratio of 0.16 and inlet turbine temperature of 500 °C.
Original languageEnglish
JournalRenewable Energy
Volume141
Pages (from-to)883-893
Number of pages11
ISSN0960-1481
DOIs
Publication statusPublished - Oct 2019

Keywords

  • Solar thermal power
  • MSW incineration
  • Parabolic trough collector
  • Exergoeconomic analysis
  • Exergy cost

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