Methods used for evaluation of actual power generating thermal cycles and comparing them

AÇIKKALP E.

International Journal of Electrical Power and Energy Systems, vol.69, pp.85-89, 2015 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 69
  • Publication Date: 2015
  • Doi Number: 10.1016/j.ijepes.2015.01.003
  • Journal Name: International Journal of Electrical Power and Energy Systems
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.85-89
  • Keywords: Ecological coefficient of performance, Ecological function, Exergetic performance criteria, Irreversibility, Maximum available work
  • Bilecik Şeyh Edebali University Affiliated: Yes

Abstract

© 2015 Elsevier B.V. All rights reserved.In this study, thermodynamic optimization criteria used for assessing thermal engines are investigated and compared. The Purpose of this is to determine the most advantageous criteria. An irreversible Carnot cycle is analyzed by using five different methods and results are compared. According to calculations, the ecological function criterion (ECF) is defined as the most convenient optimization method. Although, its work output is less than the maximum work criteria and maximum available work (MAW), it has advantageous in terms of entropy generation and first law efficiency. In addition, ecological coefficient of performance (ECOP) and exergetic performance criteria (EPC) values provide minimum entropy generation and maximum efficiency at their maximum, however, their work output is very small. ECF obtains its maximum values at x = 0.488 (377.175 kW) for endoreversible cycle and at x = 0.477 (329.812 kW) for irreversible cycle. For these reasons, ECF is suggested as the best optimization criteria.