Hi Tom, This looks very interesting project. Can you please share project report or any details of configuration? What have you been thinking for gas clean up and tar elimination?
From: [email protected] [mailto:[email protected]] On Behalf Of Tom Miles Sent: Monday, June 25, 2012 4:31 AM To: 'Discussion of biomass pyrolysis and gasification'; [email protected] Subject: Re: [Gasification] 2 MWe Gasifier at University of British Columbia, Vancouver, Canada Thomas, Mark, I think it is best to let them run for a year and work out the kinks before we second guess efficiencies. Let's hope they can get the kinds of run time and capacity factors that Babcock Volund and Repotec report. I am sure they will report once they are running smoothly. I'm interested to see where they are a year from now in operation and maintenance costs, efficiencies and overall reliability. Judging from their other plants and from what I see I would say their prospects are good. This is an installation that is only a few miles from the Nexterra head office and not far from similar gasifiers that Nexterra has have at a local paper mill. As Thomas would say, the baby is not too far from the parents so when it cries they can respond quickly. And they know where to find good quality, local, fuel. The heat output is larger than stated on their website. I haven't discussed this with them but they did say that the heat load is the primary benefit of the system. Power generation is secondary. The university pays much more for natural gas than we would pay in Oregon at industrial rates. Plus the province has a carbon tax. So heating with wood is desirable. Perhaps for this they increased the size of the boiler. If I remember correctly the jacket water dries the fuel (in a Stella down flow belt dryer). The boiler is fed with engine exhaust and directly with gas from the gasifier. The gasifier can drive either heat, power or both. Tom From: [email protected] [mailto:[email protected]] On Behalf Of Thomas Koch Sent: Sunday, June 24, 2012 3:23 PM To: [email protected]; Discussion of biomass pyrolysis and gasification Subject: Re: [Gasification] 2 MWe Gasifier at University of British Columbia, Vancouver, Canada Hi Tom Vonderfull to hear that good quality small scale gasification systems are being build. One of the challenges of small scale gasification systems are the low total efficiency. As I can read from their homepage it is a 2 MWel system that is also producing 9000 pound steam/hour and a total efficiency og 65 % That gives a total fuel input of 7,5-8 MJ/s and 25-26 % electric efficiency and a total loss of 2,5-3 MJ/s. Is it possible to say where these losses occur? Best regards Thomas Fra: [email protected]<mailto:[email protected]> [mailto:[email protected]]<mailto:[mailto:[email protected]]> På vegne af Mark Ludlow Sendt: 24. juni 2012 23:46 Til: 'Discussion of biomass pyrolysis and gasification' Emne: Re: [Gasification] 2 MWe Gasifier at University of British Columbia, Vancouver, Canada Dear Tom, Could you please clarify the steam output? (The link states 9,000pph.) Is this from a direct-fired boiler or heat recovery? If heat recovery, is it from both gas conditioning and exhaust heat recovery? Best, Mark From: [email protected]<mailto:[email protected]> [mailto:[email protected]]<mailto:[mailto:[email protected]]> On Behalf Of Tom Miles Sent: Sunday, June 24, 2012 2:27 PM To: 'Discussion of biomass pyrolysis and gasification' Subject: [Gasification] 2 MWe Gasifier at University of British Columbia, Vancouver, Canada This week I had the privilege of visiting the new 2 MWe wood fired gasifier at University of British Columbia in Vancouver, British Columbia. They are just finishing construction and will start up the Jenbacher engine in mid-July. It looks like a very well-engineered and well-built installation from fuel receiving right through the gasifier, gas cleaning, engine, boiler and heat exchange. The system will supply just under 2 MWe net to the campus and 20,0000 pph steam to the campus heating system. It is nice to have an installation of this quality and capacity in North America. See www.nexterra.ca<http://www.nexterra.ca> Tom Miles
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