Kevin is
right and wrong-
In my
experience wet woodchips will not fill a UK 40tonne unit (25tonne 70m3 payload) however with dry
(15%-20% wb) you can only get about 15-18 tonnes of payload in with a huge heaped
piles above the sides of the trailer.
There is
also some saving for not hauling so much weight and perhaps using a smaller
tractor unit (less capex and operating costs)
Why use
capstones – designed for natural gas- nice and clean when there are existing proven
technologies (reciprocating gas engines) for that application?
I will be
surprised if all your timber requirements can be met within a sensible distance
of a landfill site?
You will need
to do a fairly wide ranging study to determine the optimum operating
relationship between the different options – even though all the capital
expenditure seems huge it is actually not so relevant as the ongoing operating
costs in what will be a marginal business.
So you
must look at what is the most economical (least manpower- least handling)
solution for harvesting trees and turning them into electricity fuel,
This as other
listers have mentioned is very site specific and , if you do not have the
expertise, then you would be best advised to engage someone who has:- Go for
track record and follow up references as there are many who would claim knowledge
they don’t have. You may well get some “free” help from turnkey suppliers
however they will want to make sure you are serious with financial backing
before they invest in preparing detailed proposals.
Kind regards
gavin
Gavin
Gulliver-Goodall
3G
Energi,
Tel +44 (0)1835
824201
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8314098
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781498
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-----Original
Message-----
From: James Fields
[mailto:cfields@mail.utexas.edu]
Sent: Sunday, April 21, 2002 20:58
To: Kevin Chisholm; David
Reynolds-Lacey; gasification@crest.org
Subject: Re: GAS-L: Transportation
Cost and Storage
We are
currently investigating using the landfill gas with capstone
microturbines. It may be possible to use the waste heat off the capstone
to aid in drying.
Cody
Fields
-----
Original Message -----
To: David Reynolds-Lacey
; gasification@crest.org
Sent: Sunday, April 21, 2002
2:15 PM
Subject: Re:
GAS-L: Transportation Cost and Storage
Thanks
for the suggestion. We hadn't thought of drying the wood before
transporting it, but it is the most sensible thing to do. There is an abundance
of landfill gas available to us currently being flared.
1: It may
very well be that drying the wood "on site" will not reduce your
freight costs at all.... generally chip trucks are limited by VOLUME rather
than weight; drying the wood "on site" could result in the same
"cost per load" even though the weight is less.
2: If you
have landfill gas available, why not use it in an engine and generate electric
power on site???? You would still have about 2/3 of the contained energy for
drying, if that was an economically advantageous move to make.
Kindest
regards,
Kevin
Chisholm
