AVOIDABLE AND UNAVOIDABLE EXERGY DESTRUCTION AND EXERGOECONOMIC EVALUATION OF THE THERMAL PROCESSES IN A REAL INDUSTRIAL PLANT

Abstract

Exergy analysis is a universal method for evaluating the rational use of energy. It an be applied to any kind of energy conversion system or chemical process. An xergy analysis identifies the location, the magnitude and the causes of hermodynamic inefficiencies and enhances understanding of the energy onversion processes in complex systems. Conventional exergy analyses pinpoint omponents and processes with high irreversibility. To overcome the limitations f the conventional analyses and to increase our knowledge about a plant, dvanced exergy-based analyses are developed. These analyses provide dditional information about component interactions and reveal the real otential for improvement of each component constituting a system, as well as of he overall system. In this paper, a real industrial plant is analyzed using both onventional and advanced exergy analyses, and exergoeconomic evaluation. ome of the exergy destruction in the plant components is unavoidable and onstrained by technological, physical and economic limitations. Calculations elated to the total avoidable exergy destruction caused by each component of the lant supplement the outcome of the conventional exergy analysis. Based on the ll-reaching analysis, by improving the boiler operation (elimination of pproximately 1 MW of avoidable exergy destruction in the steam boiler) the reatest improvement in the efficiency of the overall system can be achieved.

Keywords

Dates

  • Submission Date2012-05-03
  • Revision Date2012-09-14
  • Acceptance Date2012-09-20

DOI Reference

10.2298/TSCI120503181V

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