Small Scale Expander for Geothermal.

[cmcgonag]

I am designing a third world heat engine. My team is looking at retrofitting a turbine or possibly a scroll compressor into a scroll expander. Has anyone on here had hands on experience with those retrofits? I can't find a manufacture that sells scroll/screw expanders for the size I need. I would rather purchase one or make one myself then hack one together, reliability is important and this is a time critical project.

Also, I am trying to find a pump that will work with pressurized liquid r134a. Any ideas on that?

Thanks

Colin

 

[EdStainless]

There are commercial scroll units (P&W) and screw (Electrotherm) on the market.
For contact info look at the geothermal.org web site.

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Plymouth Tube

 

[ilan7]

Stop at Ormat.com see the list of projects there. Do not do retrofits but designing the exact unit that produce the maximum power from the given heatsource.
R-134 is a Freon right? do not think you want to use it or base a unit on it