[Gasification] Levelised Energy Cost and electrical efficiency

[Greg Manning]

Tom, David, list...

http://nexterra.ca/news/100817.html

Greg Manning

On Tue, Jun 26, 2012 at 6:03 PM, Tom Miles <tmiles at trmiles.com> wrote:

> David,
>
> Thanks or the clarification. The jacket heat is used for drying the fuel.
> Part of the engine exhaust heat is fed to the boiler along with producer
> gas. So you have a producer gas fired boiler that is augmented with
> recovered heat from the engine exhaust.
>
> Tom
>
> -----Original Message-----
> From: gasification-bounces at lists.bioenergylists.org
> [mailto:gasification-bounces at lists.bioenergylists.org] On Behalf Of David
> Coote
> Sent: Tuesday, June 26, 2012 3:29 PM
> To: gasification at lists.bioenergylists.org
> Subject: [Gasification] Levelised Energy Cost and electrical efficiency
>
> 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"<tmiles at trmiles.com>
> To: "'Discussion of biomass pyrolysis and gasification'"
>        <gasification at lists.bioenergylists.org>
> Subject: Re: [Gasification] Levelised Energy Cost calculation for UBC
>        2MWe    gasifier
> Message-ID:<001801cd5334$c87e7d30$597b7790$@trmiles.com>
> 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
>
>
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