In the water electrolyzer unit operation all the heat goes to the oxygen stream, see below picture. Due to this the hydrogen stream is colder and less saturated with water than expected. Meaning that additional unit operations has to be used to correct this.

I think the water electrolyzer unit could be improved and make it more usable by splitting the heat between the streams so that the outlet temperature is the same for both streams.

Another nice to have thing could be being able to specify impurities of O2 and H2 in the outlet streams (f.ex. %mol).