Hello everyone, I've been taking an interest in steam engines lately so I experimented with what I could do in TPT. I think that the WTRV mechanics could be tweaked to make it more realistic.
First, I noticed that WTRV creates pressure exponentially until the pressure becomes so great that the WTRV condenses. To fix this, have the pressure only be generated when WTRV is first created.
Second, if WTRV condenses then it should create a vacum. This would make low-pressure engines possible.
Please give feedback on this idea, I hope to hear it soon!