On 17/04/2012 5:00 AM, [email protected] wrote:
Apologies, Luke. I edited the previous digest's text to make it shorter
and inadvertently left a line of your earlier message.
I'd just spent the day in the country near Melbourne chatting with a guy
who runs a small sawmill using salvage logs from arborists, farms,
housing development etc We worked out roughly that he's generating about
1500tonnes/annum of waste. He's very interested in using this for local
decentralised energy production. There's an enormous amount of
small-scale biomass assets dotted around the countryside.
Whoever first gets a small-scale gasifier up that meets Knoef et al's
proposed criteria on whether or not a gasification technology is
commercial could do very well. From the IEA workshop report (Knoef,
Buhler and Babu 2007, p5):
1. Continuous integrated plant operation under commercial conditions for
a minimum of 2,000 hours
2. Plant availability of 80% or higher
3. Profitable plant operation without government support; an example is
the sustainable financial support from CHP operations with feed-in rate
for electricity and heat
4. Plant operation without major modifications during the first year of
commissioning
5. Process owners willing to specify investment and operational costs
and offer or arrange performance, service, and maintenance guarantees
6. Process owners ready to offer 'turn-key' plants
Knoef et al also emphasise "that the development, optimization, and
commercialization of first-of-a-kind BMG [Biomass Gasification] process
are challenging and require substantial financial resources" (2007, p4)
and that sale of "5 or more gasification systems of the same
gasification island configuration" is a commercial criterion (2007, p1).
Knoef HAM, Buhler R, and Babu S 2007. Workshop No. 1 (2007-09):
Situation Analysis and Success and Visions for Biomass Gasification IEA.
Retrieved October 1, 2009 from
http://media.godashboard.com//gti/IEA_BRU_11-07.pdf
Message: 5
Date: Mon, 16 Apr 2012 08:27:41 -0700
From: "Luke Gardner"<[email protected]>
To: "Discussion of biomass pyrolysis and gasification"
<[email protected]>
Subject: Re: [Gasification] 1. Re: Wood Chip classificaton (Bruce
Green) Gasification Digest, Vol 20, Issue 7
Message-ID:<26AEDCF905E548B1A56E427FF3A8FA88@CrystalHP>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=response
David,
if your gonna pull my text off, pull my name off too. thanks. I agree with
your message,,,, its just not mine, the way it appears.
Luke
-----Original Message-----
From: David Coote
Sent: Monday, April 16, 2012 1:56 AM
To: [email protected]
Subject: [Gasification] 1. Re: Wood Chip classificaton (Bruce Green)
Gasification Digest, Vol 20, Issue 7
On 16/04/2012 5:00 AM, [email protected] wrote:
Today's Topics:
1. Re: Wood Chip classificaton (Bruce Green)
2. Re: Wood Chip classificaton (Peter& Kerry)
3. Re: Why would you want to make heating grade woodgas?
(Peter& Kerry)
----------------------------------------------------------------------
Message: 1
Date: Sat, 14 Apr 2012 20:29:41 -0400
From: Bruce Green<[email protected]>
To: Discussion of biomass pyrolysis and gasification
<[email protected]>
Subject: Re: [Gasification] Wood Chip classificaton
Message-ID:
<cacggi+g3eze8xddcwa_i31zkx6xfwtncawuieax9dvgywwp...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Hi all, If you really want to dry something cheap use a greenhouse. See
this technology http://www.parkson.com/products/thermo-system . Bruce
Green
On Sat, Apr 14, 2012 at 2:25 PM, Luke Gardner<[email protected]> wrote:
I thought about doing this as part of my research using a solar kiln. At
it's simplest this might be wheel in an open mesh side container full of
moist chip, leave for a few days, take out nice dry chip and
combust/gasify. The problem, of course, is that the chip will only dry
towards the outside of the container. Handling costs get restrictive if
you put the chip in trays and placing the chip in some kind of tumbler
involves extra expense for the tumbler and also some energy (and cost)
to drive the tumbler.
I was in Finland a few weeks ago where I was introduced to the concept
of a drying trailer where air is actively moved across a relatively
small container full of chip. Apparently this can dry the chip
reasonably efficiently. I might revisit the solar kiln idea using this
approach. As with everything in this area for a commercial operation
it's all about the cost
Cheers
David
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