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Jack,
ReGen Power Systems is developing a line of engines to condense low pressure steam and generate power at 13% efficiency. A higher temperature engine will convert gaseous industrial exhaust or thermal energy provided by solar collectors to power.

Justin,
BMW has been studying this approach for some time. Don't know where they are on it, but it will take some imaginative engineering as suggested above.

Dick Meloy

We think it is a very creative idea and believe it can be done, though perhaps in a slightly different manner. You have to keep the hot side operating temp below 600C to be able to avoid creep stress and premature failure of the hot heat exchanger.

<t>Incidentally, the problem with geothermal energy is not converting it to power, but simply getting it out of the ground. Drilling for heat is a lot like drilling for oil- you know it's there, but you aren't going to be successful on every well. Hence, the cost of developing a reliable stream of h...

<t>Geoff- Re: Shit-to-cake. One of the largest sources of "free" energy avaiable to us is the methane gas in what we delicately call human waste. It will not be long before we begin to convert our waste water treatment plants into power plants. I believe this source of energy may, in fact, be "infin...

<t>Lee- What you hope to do is beyond the scope of anyone other than a handful of very experienced Stirling engine experts. It sounds simple, but is, in fact, very difficult. You know the old saying- if it were simple, everyone would have done it by now. You might be interested in our company's webs...

<t>ReGen Power has analyzed a commercial glass furnace and believes its engine will produce alot of power from the exhaust. As was mentioned, one needs to know the actual volume of heat per unit of time. If you can provide me with that, we could give you an answer. (The designer of our engine former...

<t>ReGen Power Systems has designed a Stirling to operate as a steam condensing engine, utilizing the latent heat of condensation to drive the engine. The design is novel, overcoming the issue of unswept volume, and cannot be disclosed at the present time. We expect to have a bench model operating w...

<r>Stirling Advantage has changed its name to ReGen Power Systems at <URL url="http://www.rgpsystems.com">www.rgpsystems.com</URL>. It continues to improve its designs and continues to experience ignorance from capital providers. We now contemplate maximum engine sizes in the 1-2 MW range, using low...

<t>Automotive Stirling applications are non-starters for one important reason: engines are bought on a cost/kW basis, and no commercial Stirling will ever be cheaper than a gasoline engine on that basis. Further, to make a Stirling utilize waste heat from an exhaust efficiently, the engine must be t...