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Exergetic efficiency of a PEM electrolyser at various operating temperatures and pressures
Courtesy of Inderscience Publishers
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/To) and pressures (P/Po) ranging from 1 to 1.4 and 1 to 10, respectively. The results showed that at 1 atm (P/Po=1), the exergetic efficiency of an electrolyser decreases from 84% at 298K (T/To=1) to 62% at 417K (T/To=1.4).
Keywords: exergy, hydrogen energy, PEM electrolyser
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