Frank,
Direct combustion options include steam, Stirling engines, and organic Rankine cycle (ORC) turbines. The challenge we have with these options is cost, especially at the small scale. We did a recent comparison of the feasibility at the 2 MWe scale and found that steam was the most cost effective compared with ORC or Stirling. Tom From: Stoves [mailto:[email protected]] On Behalf Of Frank Shields Sent: Monday, May 13, 2013 10:55 AM To: 'Discussion of biomass cooking stoves' Subject: [Stoves] Using all the energy when char making Stovers, Seems there is often a lot of wasted energy that could be used when making char that is just flared off. I'm thinking the reason is that to convert to electricity one needs 1) a very clean syngas 2) an expensive motor and 3) costly up-keep. The generator is a onetime purchase with low maintenance. So why not use a steam engine to convert the flame to electricity? Perhaps not as efficient but all you are doing is heating water so the gas need not be as clean as when drawn into an internal combustion engine. Thanks Frank Thanks Frank Shields BioChar Division Control Laboratories, Inc. 42 Hangar Way Watsonville, CE 95076 (831) 724-5422 tel (81) 724-3188 fax [email protected] www.controllabs.com
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