[Stoves] Bulk density of LPG vs pellets

Cookswell Jikos cookswelljikos at gmail.com
Tue Feb 13 12:53:43 CST 2018


Crispin, speaking of torrifying, do you (or anyone else) know of any 'low
tech' and hopefully low cost methods of torrifying bamboo by chance?

Thanks

Teddy

On 13 Feb 2018 9:46 pm, "Crispin Pemberton-Pigott" <
crispinpigott at outlook.com> wrote:

Dear Paul



Perhaps you could consider transporting torrefied pellets
<https://www.pellet.org/images/5%20-%20Bahman%20Ghiasi.pdf> instead of raw
wood (21 MJ/kg). Not only is it more energy per ton, it is more likely not
to be damaged by moisture. That link has some interesting info BTW.



You can guess that the LPG (46 MJ/kg) is about 2.7 times the energy of the
pellets (17 MJ/kg), however the empty mass of the tank is about equal to
the gas contents. Thus the energy content per transported kg is only 1.35
times that of the wood.



In terms of cost the wood should be cheaper, delivered.



If you are turning the wood into char and not burning it, the cost
advantage will be lost. I presume you have a plan to offset that.



Regards
Crispin





-----Original Message-----
From: Stoves [mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of
Paul Anderson
Sent: 13-Feb-18 10:15
To: Stoves and biofuels network <Stoves at lists.bioenergylists.org>
Subject: [Stoves] Bulk density of LPG vs pellets



Dear Stovers and friends,



I hope that someone can provide an answer to this question:



The situation:  A fuel for cooking needs to be transported to communities
in somewhat remote locations.   There are roads that at least allow a
pickup truck to go in and out year-round.  The people have access to
locally sources woody biomass fuel, but are interested in having some
better stoves with processed fuels.   In particular, they are considering
LPG in standard bottles/tanks that are brought in full, and empties are
taken back.    They are also considering  pellets that are in typical 40
pound (~18 kg) bags, with local sales in smaller quanties.   Consider
initially that the pellets are made in the same location where the LPG
bottles are refilled.  (We can consider different distances of transport
later, if of interest).  (also, there will be some differences if different
sizes of LPG bottles or pellets in super-sacks are used, but that is not of
much interest in this initial

discussion.)



The question:  How much energy can be transported in each delivery trip,
and which becomes the most economical -- or are they about the same? The
LPG has more energy per kg of fuel, but must be transported in metal
containers that are cylindrircal and occupy much space.   The pelelts are
in bags that can be stacked (such as on a pallet of pellets).



Boilse down to:   LPG in bottles vs pellets in sacks.



My thanks to everyone who contributes to answering this question.



Paul



--

Doc  /  Dr TLUD  /  Prof. Paul S. Anderson, PhD

Email:  psanders at ilstu.edu

Skype:   paultlud    Phone: +1-309-452-7072

Website:  https://nam03.safelinks.protection.outlook.com/?url=
www.drtlud.com&data=02%7C01%7C%7C1f5941fb59884cf761ce08d572f51165%
7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636541319233583963&sdata=
8C5DI9HeatzQFb69kgQKaQyCKIdwesQi2QiWGKaJork%3D&reserved=0





_______________________________________________

Stoves mailing list



to Send a Message to the list, use the email address

stoves at lists.bioenergylists.org



to UNSUBSCRIBE or Change your List Settings use the web page

https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.
bioenergylists.org%2Fmailman%2Flistinfo%2Fstoves_lists.
bioenergylists.org&data=02%7C01%7C%7C1f5941fb59884cf761ce08d572f51165%
7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636541319233583963&sdata=nK%
2BkbaxuWRqc0xoNqzOfzMkGydnq2JMURI%2FFPFn6io0%3D&reserved=0



for more Biomass Cooking Stoves,  News and Information see our web site:

https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fstoves.
bioenergylists.org%2F&data=02%7C01%7C%7C1f5941fb59884cf761ce08d572f51165%
7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636541319233583963&sdata=
yfZUYxdY1H5n8t2EXOTUft8ptyWgYYvvVFRTcOTK4qI%3D&reserved=0



_______________________________________________
Stoves mailing list

to Send a Message to the list, use the email address
stoves at lists.bioenergylists.org

to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_
lists.bioenergylists.org

for more Biomass Cooking Stoves,  News and Information see our web site:
http://stoves.bioenergylists.org/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20180213/638aff65/attachment.html>


More information about the Stoves mailing list