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Dr. Jerryrigger I agree with you about using the engine cooling system for pre heating the water. It will really help get the water closer to boiling before it enters the boiler.
I think that the pressure washer pump is probably overkill, they can provide 2000psi and up, I wouldn't suggest anyone build a DIY steam system at that pressure unless you do the engineering. one good thing is the pressure washer is already built for water. I was thinking a small power steering pump or oil pump might work for a cheap pump but they might not be vary eff.
That slotted turbine is cool I would like to build one some day, but why go with the DIY turbine when theirs lots of positive displacement engines and pumps that could be adapted? I just can't see the turbine being vary eff and it would be hard to size it right for the system.
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