Title: Exergetic efficiency of a PEM electrolyser at various operating temperatures and pressures

Authors: Ayoub M. Kazim

Addresses: United Arab Emirates University, Department of Mechanical Engineering, PO Box 17555, Al-Ain, UAE

Abstract: This paper presents a comprehensive exergy analysis on a large scale 12,900kW PEM electrolyser at various operating temperatures and pressures. Calculations of physical exergy, mass flow rates and exergetic efficiency are performed at temperatures (T/T_o) and pressures (P/P_o) ranging from 1 to 1.4 and 1 to 10, respectively. The results showed that at 1 atm (P/P_o=1), the exergetic efficiency of an electrolyser decreases from 84% at 298K (T/T_o=1) to 62% at 417K (T/T_o=1.4).

Keywords: exergy; hydrogen energy; PEM electrolyser.

DOI: 10.1504/IJEX.2004.004733

International Journal of Exergy, 2004 Vol.1 No.1, pp.47 - 59

Published online: 07 Jul 2004 *

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