[Gasification] Ash to land? - separated ash fractions

[Oscar]

Dear AJH and list members.

AJH wrote:



>>>>....I was told they could deliver a system for $3600/kWe
complete from the fuel bin to genset without the switchgear for the grid.

....<<<<I wonder how that breaks down? I'll guess more for the gas cleanup
than the gasifier and engine combined...>>>>

According to commercial offers received from biomass gasification supplier,
it breaks down roughly this way:

-28 % goes to gasifier along with all its accessories and auxiliaries.
-32 % goes to diesel genset.
-10 % goes to gas cooling and cleaning.

Kindest regards.

Oscar.



-----Mensaje original-----
De: gasification-bounces at listserv.repp.org
[mailto:gasification-bounces at listserv.repp.org] En nombre de AJH
Enviado el: viernes, 11 de mayo de 2007 12:58
Para: Discussion of biomass pyrolysis and gasification
Asunto: Re: [Gasification] Ash to land? - separated ash fractions

On Fri, 11 May 2007 09:48:11 -0700, Tom Miles wrote:

>In October 2006 I was told they could deliver a system for $3600/kWe
>complete from the fuel bin to genset without the switchgear for the grid.

I wonder how that breaks down? I'll guess more for the gas cleanup
than the gasifier and engine combined.
>
>I assume that is a reasonable cost for supplying power from urban wood
under
>a NFFO (Non-Fossil Fuel Obligation) contract which seems to be 7.47 p/kWh
>(Landfill gas) or about USD $0.148/kWh.  

I've never been involved in the financial side of this but I don't
think any of the NFFO gasification projects delivered. By 2006 I think
any that did win contracts would have timed out. After that I think
they would have had to rely on renewable obligation certificates and
other incentives, like carbon credits.

Also the NFFO contracts were more heavily subsidised, I heard figures
around GBP0.15kWhr(e) but I think only conventional steam plants
actually supply the grid from biomass (there is one 15 miles from me
which consumes 300,000tonnes but the fluidised bed and boilers seem
offline a lot).

I don't know your definition of urban wood, most of England is urban
by some definitions, but I don't think any growers obtain a net income
over costs for any wood delivered to a grid supplying power station.
The wood is mostly subsidized by being a result of land clearance for
other reasons.

Someone in UK more in touch with the system ought to be able to
provide a better picture.
AJH




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