Comparison of ORC and Kalina cycles for waste heat recovery in the steel industry

  • Jarosław Milewski Warsaw University of Technology, Institute of Heat Engineering
  • Janusz Krasucki CIM-mes Projekt Sp.z o.o.

Abstract

This paper presents the results of a comparative study of waste heat recovery systems based on the Organic Rankine Cycle(ORC) and Kalina Cycle (KC) that could be applied to the steel industry. The simulations were performed for an electricarc furnace (EAF) steel mill and waste heat recovery system with saturated steam as a heat carrier. Commercial softwareASPEN-HYSYS was used to calculate system performances under different loads for ORC with different working fluids(butylobenzene, n-hexane, n-pentane) and for KC. Each case was optimized for maximum system efficiency. In terms of netsystem electric efficiency and electric power output, under nominal operating conditions similar performances were obtainedfor ORC with n-pentane working fluid and KC based systems. The highest system efficiency was observed for ORC withbutylobenzene as working fluid, whereas the KC becomes competitive versus ORC for heat carrier temperatures of 200°Cand above.

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Published
2018-01-22
How to Cite
MILEWSKI, Jarosław; KRASUCKI, Janusz. Comparison of ORC and Kalina cycles for waste heat recovery in the steel industry. Journal of Power Technologies, [S.l.], v. 97, n. 4, p. 302--307, jan. 2018. ISSN 2083-4195. Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/1191>. Date accessed: 05 aug. 2021.
Section
Renewable and Sustainable Energy

Keywords

Waste heat recovery, EAF process, ORC system, Kalina Cycle system

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