The Electrolyzer System: Balance of Plant and Minimum Load

Why watch it?

What does a PEM electrolyzer plant consume beyond its stack? Lesson 5 of the Green Hydrogen Fundamentals series, presented by Prof. Hani Muhsen of Hasim Software, works through the balance of plant of a 10 MW example plant: water loop and pump, separators, heat exchanger and dry cooler, ion exchanger, deoxo unit, dryer and gas analyzer. According to the presenter, stack consumption of 50.6 kWh/kg rises to 54.7 kWh/kg at plant level once power electronics and auxiliaries are included. The lesson also shows how hydrogen crossover sets the hydrogen-in-oxygen level and the minimum load. The example is built in the publisher's own simulation software, and all figures rest on model assumptions rather than measured plant data.

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