Thanks for the response, I will check out those sites.
I heard about a Tesla turbine that sounds very simple.
Input would be 15psig going into pressure regulator, so the turbine would see maybe 8 psig, If I go over 15 psig I need to have a licensed operator.
Exhaust pressure would be as close to atmospheric pressure as possible. I'm thinking about doing combined heat and power, so an exhaust steam heat exchanger would use 120 deg F entering water temperature to cool the steam.
Would be trying to make 60 hz AC power, possibly synchronized to the grid. For economic reasons I have to stay under 40 kw output, (PURPA regulations to obtain a decent price for electricity).
The idea is to provide about 10 watt/ft^2 to light a 4000 ft^2 green house while utilizing the heat of rejection for cold climate heat loss. Design heat loss would be 450,000 btuh so if you subtract -40000*3.413=313480 btuh. If turbine was 20 % efficient I would get 546080 btuh rejected heat, a slight excess.
Because the greenhouse doesn't need to be lighted 24hr/day,
the opportunity exists to make electricty to sell to grid, sort of a by product of this hair brained scheme.
This all will require a government grant of course.