Thanks for the info, Tom. The GCV/NCV item is always a fertile source of confusion between various countries. I quote efficiency on NCV. So the efficiency I used for calculating the LEC used NCV which was derived from GCV (dry basis) taking into account moisture content and water from the combustion reaction.
On another topic, any idea how they're getting their heat? Is it off a water jacket on the engine? Cheers David Message: 13 Date: Mon, 25 Jun 2012 17:44:02 -0700 From: "Tom Miles"<[email protected]> To: "'Discussion of biomass pyrolysis and gasification'" <[email protected]> Subject: Re: [Gasification] Levelised Energy Cost calculation for UBC 2MWe gasifier Message-ID:<[email protected]> Content-Type: text/plain; charset="us-ascii" David, They offset high priced gas plus a CO2 tax of about CAN$2.75/GJ (?) so the products are electricity, heat (~12-20% of campus demand), and CO2 tax offset. It is really a heating plant with a 2 MWe generator. If the plant electrically efficiency is based on GCV then 24% is probably too high. It's usually in the 14-17% range.
From their published profile:
Electricity Production 15,300,000 kWh/yr Annual Gas Displacement 86,000 MMBtu/yr (from 9,600 pph steam [now increased to 20,000 pph]). Avoided CO2 Emissions 4,500 tonnes yr Avoided CO2 Emissions (Car Equivalent) 1,100 cars/yr Wood Fuel Required 12,500 bone dry tonnes/yr Tom _______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/
