All of which in practice leads to about 1.4 kg wood/kWh or about 700 kWh per tonne (or solid cubic meter). (Of course there will be 10,000 exceptions. :-)) Tom Miles ----- Original Message ----- From: "AJH" <andrew.heggie@dtn.ntl.com> To: <stoves@crest.org> Cc: <gasification@crest.org> Sent: Saturday, October 26, 2002 1:43 AM Subject: Re: 100KW size? (was Re: GAS-L: Great persons in gasification - Gus Johansson) > On Fri, 25 Oct 2002 22:09:03 -0500, Harmon Seaver > <hseaver@cybershamanix.com> wrote: > > > > > About how large is a 100K gasifier and how much woodchips per hr would one > >take? > > The gasifier may not be much bigger than the genset, the pipe work and > gas cleanup tend to occupy a lot of space, I never measured actual > dimensions of the ones I have seen. They all seemed to measure run > time in tens of hours per annum rather than 8000+. > > Simplistically the fuel consumption is dependant on the cold gas > efficiency and the engine fuel to motive power conversion. In a simple > system the product of these two numbers will be in the order of 20%. > So 100kW(e) will need about 500kW(t) of energy input. 1kg of dry wood > will have a cv of ~18-20MJ which is at worst 5kWhr. Therefore to run > the gasifier to support this electrical demand, assuming negligible > char in the ash from the gasifier, for 1hr you will consume 100kg of > dry wood plus its associated moisture. > > Cordner Peacocke and Doug Williams have frequently posted on the > pitfalls and problems in putting this into practice on Gas-L. > > AJH > > - > Stoves List Archives and Website: > http://www.crest.org/discussion/stoves/200209/ > http://crest.org/discussiongroups/resources/stoves/ > > > Stoves List Moderators: > Ron Larson, ronallarson@qwest.net > Elsen L. Karstad, elk@wananchi.com www.chardust.com > > Other Biomass Stoves Events and Information: > http://www.crest.org/articles/static/1/1010424940_7.html Bioenergy > http://www.crest.org/articles/static/1/1011975339_7.html Gasification > http://www.crest.org/articles/static/1/1011975672_7.html Carbon > > List-Post: <mailto:stoves@crest.org> > List-Help: <mailto:stoves-help@crest.org> > List-Unsubscribe: <mailto:stoves-unsubscribe@crest.org> > List-Subscribe: <mailto:stoves-subscribe@crest.org> > > > For information about CHAMBERS STOVES > >http://www.repp.org/discussiongroups/resources/stoves/Chambers/Chambers.htm > > - Stoves List Archives and Website: http://www.crest.org/discussion/stoves/200209/ http://crest.org/discussiongroups/resources/stoves/ > Stoves List Moderators: Ron Larson, ronallarson@qwest.net Elsen L. Karstad, elk@wananchi.com www.chardust.com Other Biomass Stoves Events and Information: http://www.crest.org/articles/static/1/1010424940_7.html Bioenergy http://www.crest.org/articles/static/1/1011975339_7.html Gasification http://www.crest.org/articles/static/1/1011975672_7.html Carbon List-Post: <mailto:stoves@crest.org> List-Help: <mailto:stoves-help@crest.org> List-Unsubscribe: <mailto:stoves-unsubscribe@crest.org> List-Subscribe: <mailto:stoves-subscribe@crest.org> > For information about CHAMBERS STOVES >http://www.repp.org/discussiongroups/resources/stoves/Chambers/Chambers.htm
