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Exergetic and environmental analysis of a pulverized coal power plant

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  • Restrepo, Álvaro
  • Miyake, Raphael
  • Kleveston, Fábio
  • Bazzo, Edson

Abstract

This paper presents the results of exergetic and environmental analysis of a typical pulverized coal power plant located in Brazil. The goal was to quantify both the exergy destruction and the environmental impact associated with a thermal power plant. The problem boundary consists of the entire coal delivery route, including mining and beneficiation, transport, pre-burning processes and the power plant. The used data were obtained mainly from field measurements taken in all system processes, from mining to the power plant. The study focused only on the operation period. Previous works have shown that the construction and decommissioning periods contribute less than 1% of the environmental impact. The exergetic analysis was based on the second law of thermodynamics while the environmental analysis was based on life cycle assessment (LCA) using SimaPro 7.2, focussing on the climate change and acidification impact categories. The CO2-eq emission was 1300 kg per MWh. The highest degree of environmental impact occurred during the combustion process. The exergetic and environmental analysis provides a tool to evaluate irreversibilities and the environmental impact, identifying the most significant stages and equipment of the entire power generation process.

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  • Restrepo, Álvaro & Miyake, Raphael & Kleveston, Fábio & Bazzo, Edson, 2012. "Exergetic and environmental analysis of a pulverized coal power plant," Energy, Elsevier, vol. 45(1), pages 195-202.
    • Handle: RePEc:eee:energy:v:45:y:2012:i:1:p:195-202
    DOI: 10.1016/j.energy.2012.01.080
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