[Gasification] Ash to land? - separated ash fractions

[Tom Miles]

Thanks Oscar and Daniel, 

Applying Oscar's cost structure:
Diesel genset 	$1152/kW
Gasifier		$1008/kW
Gas cool/clean	$ 360/kW	
Total		   	$3600/kW

It sounds like a target system cost should be $1800/kWe or less. Prototypes
have been costing $5,000-$40,000/kW.   

For $1800/kWh the genset cost probably wouldn't change. You'd have to reduce
the cost of the gasifier and gas cleaning from $1368/kW to $648/kW.

So the challenge is to go from the fuel hopper to the engine for $162,000 at
250kW; $64,800 at 100kW or $32,400 at 50 kW.     

Tom

-----Original Message-----
From: gasification-bounces at listserv.repp.org
[mailto:gasification-bounces at listserv.repp.org] On Behalf Of Daniel Chisholm
Sent: Friday, May 11, 2007 12:18 PM
To: Discussion of biomass pyrolysis and gasification
Subject: Re: [Gasification] Ash to land? - separated ash fractions

On Fri, 2007-11-05 at 09:48 -0700, Tom Miles wrote:
> >Given their hi tech background and engineering experience this should
> >be a serious contender as a commercial product, but I'll guess not
> >cheap.
> >AJH
> 
> 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 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.  

$3600/kWe, yikes!

At 85% availability (7446 hrs/yr), a ten year simple amortization gives
4.83 cents per kWh.  At an 8% cost of capital, that's 3.87 cents/kWh.
These two total 8.70 cents/kWh.

Presumably they pay something for fuel, and operations and maintenance
too.  Fuel at $3/mmBTU ($30 per tonne at 45%mc) would be about 5
cents/kWh.

With a capital cost like that, it sounds like it'll be a struggle to
break even, even at a strongly-subsidized 15 cents/kWh.  No way it can
produce retail-priced (~10cents/kWh) electricity, and no-way-no-how at
wholesale (~5cents/kWh).

My gosh, it is depressing to run spreadsheet calcs like this.  On the
one hand (buying;-), electricity is just too darn expensive.  On the
other hand (selling;-), it is just too darn cheap.




-- 
- Daniel
Fredericton, NB  Canada


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