If you talking about "closing the loop", then the Stirling engine is a good choice. Here is one he could use.
http://www.whispergen.com/main/PRODUCTS/ If I am correct about the cascade, then a Stirling can provide about 15% conversion of heat to electricity (due to the low Carnot spread) but 15% of a megawatt is overkill, except for the nefarious few who may be snooping around on this demo ... and who love that word 'overkill' (literally). As any fool can see, this kind of device would be ideal for the military - tank, submarine, drone airplane that stays aloft for months . Maybe some observers thought we were joking about a threat from Russian interests (or Chinese, Arabs, Israel etc) . With this kind of gain, the threat to Rossi or his family is no joke. Jones From: Jed Rothwell I think Cravens meant Rossi should use the heat to generate electricity and make the device self-sustaining.
