<div dir="auto">Crispin, speaking of torrifying, do you (or anyone else) know of any 'low tech' and hopefully low cost methods of torrifying bamboo by chance? <div dir="auto"><br></div><div dir="auto">Thanks</div><div dir="auto"><br></div><div dir="auto">Teddy </div></div><div class="gmail_extra"><br><div class="gmail_quote">On 13 Feb 2018 9:46 pm, "Crispin Pemberton-Pigott" <<a href="mailto:crispinpigott@outlook.com">crispinpigott@outlook.com</a>> wrote:<br type="attribution"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div lang="EN-CA" link="#0563C1" vlink="#954F72">
<div class="m_8967945870996268082WordSection1">
<p class="m_8967945870996268082MsoPlainText">Dear Paul<u></u><u></u></p>
<p class="m_8967945870996268082MsoPlainText"><u></u> <u></u></p>
<p class="m_8967945870996268082MsoPlainText">Perhaps you could consider transporting <a href="https://www.pellet.org/images/5%20-%20Bahman%20Ghiasi.pdf" target="_blank">
torrefied pellets</a> 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.<u></u><u></u></p>
<p class="m_8967945870996268082MsoPlainText"><u></u> <u></u></p>
<p class="m_8967945870996268082MsoPlainText">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.<u></u><u></u></p>
<p class="m_8967945870996268082MsoPlainText"><u></u> <u></u></p>
<p class="m_8967945870996268082MsoPlainText">In terms of cost the wood should be cheaper, delivered.<u></u><u></u></p>
<p class="m_8967945870996268082MsoPlainText"><u></u> <u></u></p>
<p class="m_8967945870996268082MsoPlainText">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.<u></u><u></u></p>
<p class="m_8967945870996268082MsoPlainText"><u></u> <u></u></p>
<p class="m_8967945870996268082MsoPlainText">Regards<br>
Crispin<u></u><u></u></p>
<p class="m_8967945870996268082MsoPlainText"><u></u> <u></u></p>
<p class="m_8967945870996268082MsoPlainText"><u></u> <u></u></p>
<p class="m_8967945870996268082MsoPlainText"><span lang="EN-US"><div class="quoted-text">-----Original Message-----<br>
From: Stoves [mailto:<a href="mailto:stoves-bounces@lists.bioenergylists.org" target="_blank">stoves-bounces@lists.<wbr>bioenergylists.org</a>] On Behalf Of Paul Anderson<br></div><div class="quoted-text">
Sent: 13-Feb-18 10:15<br>
To: Stoves and biofuels network <<a href="mailto:Stoves@lists.bioenergylists.org" target="_blank">Stoves@lists.bioenergylists.<wbr>org</a>><br>
Subject: [Stoves] Bulk density of LPG vs pellets</div></span></p>
<p class="m_8967945870996268082MsoPlainText"><u></u> <u></u></p>
<p class="m_8967945870996268082MsoPlainText">Dear Stovers and friends,<u></u><u></u></p><div class="quoted-text">
<p class="m_8967945870996268082MsoPlainText"><u></u> <u></u></p>
<p class="m_8967945870996268082MsoPlainText">I hope that someone can provide an answer to this question:<u></u><u></u></p>
<p class="m_8967945870996268082MsoPlainText"><u></u> <u></u></p>
<p class="m_8967945870996268082MsoPlainText">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<u></u><u></u></p>
<p class="m_8967945870996268082MsoPlainText">discussion.)<u></u><u></u></p>
<p class="m_8967945870996268082MsoPlainText"><u></u> <u></u></p>
<p class="m_8967945870996268082MsoPlainText">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).<u></u><u></u></p>
<p class="m_8967945870996268082MsoPlainText"><u></u> <u></u></p>
<p class="m_8967945870996268082MsoPlainText">Boilse down to: LPG in bottles vs pellets in sacks.<u></u><u></u></p>
<p class="m_8967945870996268082MsoPlainText"><u></u> <u></u></p>
<p class="m_8967945870996268082MsoPlainText">My thanks to everyone who contributes to answering this question.<u></u><u></u></p>
<p class="m_8967945870996268082MsoPlainText"><u></u> <u></u></p>
<p class="m_8967945870996268082MsoPlainText">Paul<u></u><u></u></p>
<p class="m_8967945870996268082MsoPlainText"><u></u> <u></u></p>
<p class="m_8967945870996268082MsoPlainText">--<u></u><u></u></p>
<p class="m_8967945870996268082MsoPlainText">Doc / Dr TLUD / Prof. Paul S. Anderson, PhD<u></u><u></u></p>
<p class="m_8967945870996268082MsoPlainText">Email: <a href="mailto:psanders@ilstu.edu" target="_blank"><span style="color:windowtext;text-decoration:none">psanders@ilstu.edu</span></a><u></u><u></u></p>
<p class="m_8967945870996268082MsoPlainText">Skype: paultlud Phone: +1-309-452-7072<u></u><u></u></p>
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