Have spoken to the guy building the tesla turbines in Denver. They have made two turbines of 250 kwe. They expect to go into production with nothing smaller than 500kwe. They have built them to run on gaseous fuels only at present. They will have an idea of efficiency soon and within two months will no exactly. These are not machines that you build in your garage they are skid mounted and about 8 feet long. They are vast. (I thought tesla engines were meant to be small) He has promised to keep me updated I cant seem to find a website but they have their own email server. They are expecting the final 500 kwe models to come out at $650 / kwe. Not much cheaper than a reciprocating genset. Jonathan The Gasification List is sponsored by USDOE BioPower Program http://www.eren.doe.gov/biopower/ and PRM Energy Systems http://www.prmenergy.com Other Sponsors, Archives and Information http://www.crest.org/renewables/gasification-list-archive http://solstice.crest.org/renewables/biomass-info/gasref.shtml http://www.crest.org/renewables/biomass-info/ http://www.crest.org/renewables/biomass-info/carbon.shtml