[Gasification] Question: Connecting a gasifier to a microCHPunit

[Tom Miles]

Phil,

Thanks for the report. Is that CDN 3900/kW (USD 3700/kW)just for the
Stirling and heat exchanger and so the CDN 5,300/kW (USD $5,000/kW) gasifier
is extra?

Thanks

Tom

> -----Original Message-----
> From: gasification-bounces at listserv.repp.org [mailto:gasification-
> bounces at listserv.repp.org] On Behalf Of Phil Marsh
> Sent: Sunday, September 02, 2007 6:28 PM
> To: 'Discussion of biomass pyrolysis and gasification'
> Subject: Re: [Gasification] Question: Connecting a gasifier to a
> microCHPunit
> 
> Tom & List:
> 
> I just finished meeting with Lars Jagd, CEO of Stirling Danmark. They
> are
> considering moving into the Canadian and US markets but the decision is
> not
> yet final as the incentive to operate (green electricity price) in
> Europe is
> much greater. The current price for their stirling engine works out to
> about
> $3900 CDN per KW but they hope to cut that price in half over the next
> two
> years. That may be ambitious or maybe not. Their current machine is in
> the
> 35Kw range. With combined units they are not planning to go above 150Kw
> in
> the near future. They need a gas temperature in the 1200 to 1300C
> range,
> this can give them efficiencies in the 25% range but the heat exchange
> materials are very expensive, thus the high cost.
> 
> If you can afford the investment, or can't afford not to, these units
> might
> be better suited to topping on an IC engine generator where in theory
> the
> fuel (exhaust gases) are free. If your electricity price is good and
> the
> equipment reliable and maintenance free I think an economic case could
> be
> made.
> 
> 
> 
> Phil Marsh
> Marsh Bros.
> (250) 569-2795
> -----Original Message-----
> From: gasification-bounces at listserv.repp.org
> [mailto:gasification-bounces at listserv.repp.org] On Behalf Of Tom Miles
> Sent: September 1, 2007 9:41 AM
> To: 'Discussion of biomass pyrolysis and gasification'
> Subject: Re: [Gasification] Question: Connecting a gasifier to a
> microCHPunit
> 
> If you search the gasification website for stirling you get:
> http://gasifiers.bioenergylists.org/search/node/stirling
> 
> Also select the small/microCHP tab:
> http://gasifiers.bioenergylists.org/smallchp
> 
> The only work I know of using producer gas and stirling engines was by
> Henrik Carlsen at Danish Technological University which led to the
> formation
> of Stirling Danmark
> http://www.stirling.dk/
> 
> They developed a special heat exchanger for producer gas. They claim
> that
> using wet wood in an updraft gasifier: "Typically, a plant with a 200
> kW
> wood chips consumption will generate around 35 kWe power and 145 kW
> heat.
> The capacity of the updraft gasifier can easily be increased where
> several
> Stirling engines can be fuelled. Plant sizes with electrical outputs of
> 300
> kW or more is thus possible." That's 17.5% based on lower heating value
> which would be comparable to a spark ignition engine. This was based on
> testing at Harbore in Denmark. They also have 45 kWe and 85 kWe engines
> that
> have been used on wood for a few years.
> http://www.stirling.dk/default.asp?ID=142
> 
> A few years ago the target price for a gasifier=stirling system was
> about
> 3000 EUR/kW or about USD $4000/kW
> 
> I don't know the current activities of the company.
> 
> Tom Miles
> 
> 
> 
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> 
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