In reply to David Roberson's message of Wed, 1 Jan 2014 14:47:04 -0500 (EST): Hi, [snip] >The main item of interest is how efficient is the conversion of heat energy >into sound and ultimately electricity. The high efficiency that they mention >likely is in response to them using the waste heat in its degraded form.
Based on the figures given (1-4 kW electric 15-30 kW thermal) I would say that the conversion efficiency is not very high, e.g. 4/34 = 11.8%. However it does provide a combined heat/power option for the home, something which is not exactly widely available. It could also be a good match for novel heat sources (LENR). Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html
