Solar and thermalDotcom

http://solarandthermal.com/index.htm

http://opensourceecology.org/wiki/Steam_Engine_Correspondence/SolarAndThermal.com

Gentlemen, I see you're looking for a low-cost steam engine technology. The S&T hot gas engine may be a superior solution than the Cyclone derived expander you're trying to achieve via open-source efforts. The S&T engine as currently executed is a hermetically sealed machine intended to contain anhydrous ammonia. A water-steam powered cycle is possible an could potentially be build with lower cost bronze bushings instead of the anti-friction bearings we currently specify. (Yes, I'm much more of an engineer than a sales / corporate type) Of course, since S&T is a commercial venture, our interest would be in the manufacturing of these engines in quantity for your intended distribution targets. We would also consider the licensing of the technology to other manufacturers. (But, without some business there would be no progress and civilization would collapse.) I too have a background in the software world. Back in the 80's-90's we developed tools and provided full commented source code. I just thought you might appreciate that tidbit. The S&T engine has a rather simple design, that's o say it's been called a "flat-forehead" idea... i.e. you'll knock your open palm against your forehead once you see the design and say: "I should have thought of that!". Perhaps our mutual interests are set to intersect at this moment in time... Regards, --Paul Solar & Thermal Paul Passarelli President Paul@SolarAndThermal.com (203)846-2500 The Light is Green! [edit]

throughs on roof with border
http://solarandthermal.com/51_quickly.htm

How much power for a 50,000 sq ft roof?

Because we provide a border away from the edge of the roof, you should be able to mount a 100kW system on a roof of this size. Again the space around and between the panels is important for maximizing the effectiveness of the system.