<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Arial; font-size: 12pt; color: #000000'>Josh:<br><br> I certainly want to be on your list of recipients, but think you should send to the whole list.<br><br> I learned va googling that you will be experimenting with a "drupe". I want now to hear what happens with avocado pits. I think we need really big TLUDS to make them work.<br><br> Others are plums,peaches,dates,mangoes and apricots. Mangos sound the most interesting of that list. None spheres, but also none are pencil-like.<br><br> There are probably experts around for each who can give the packing fraction (or void space and average path length so as to predict a "superficial velocity".<br><br> I hope all is gong well for you away from Colorado. You are needed here.<br><br>Ron<br><br><hr id="zwchr"><b>From: </b>"Josh Kearns" <yeah.yeah.right.on@gmail.com><br><b>To: </b>"Discussion of biomass cooking stoves" <stoves@lists.bioenergylists.org><br><b>Sent: </b>Tuesday, May 7, 2013 3:21:33 PM<br><b>Subject: </b>Re: [Stoves] Charcoal as space filler in TLUD reactors<br><br><div dir="ltr">I just got a bunch of (spherical) cherry pits I'm going to try soon. Let me know if you are interested in the results....</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, May 7, 2013 at 4:57 PM, <span dir="ltr"><<a href="mailto:rongretlarson@comcast.net" target="_blank">rongretlarson@comcast.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-size:12pt;font-family:Arial">Frank and list:<br><br> Need to bring in one more variable: fuel shape. Imagine the fuel is pencil shaped. If placed vertically, they work fine to make char. If horizontal and parallel, they can block most vertical air flow. Anyone able to supply biomass fuel spheres?<br>
<br>Ron<br><br><hr><b>From: </b>"Frank Shields" <<a href="mailto:frank@compostlab.com" target="_blank">frank@compostlab.com</a>><br><b>To: </b>"Discussion of biomass cooking stoves" <<a href="mailto:stoves@lists.bioenergylists.org" target="_blank">stoves@lists.bioenergylists.org</a>><br>
<b>Sent: </b>Tuesday, May 7, 2013 2:46:13 PM<div><div class="h5"><br><b>Subject: </b>Re: [Stoves] Charcoal as space filler in TLUD reactors<br><br>Dear Martin, <br><br>I often determine the particle density here in the lab using free flowing<br>
sand. If the particle density of the fuel is determined (g/cc) and you know<br>the weight of fuel packed in a known volume you know the volume of voids and<br>can determine the air speed - I am thinking. <br><br>Frank<br>
<br><br><br><br>-----Original Message-----<br>From: Stoves [mailto:<a href="mailto:stoves-bounces@lists.bioenergylists.org" target="_blank">stoves-bounces@lists.bioenergylists.org</a>] On Behalf Of<br><a href="mailto:ajheggie@gmail.com" target="_blank">ajheggie@gmail.com</a><br>
Sent: Tuesday, May 07, 2013 1:26 PM<br>To: Discussion of biomass cooking stoves<br>Subject: Re: [Stoves] Charcoal as space filler in TLUD reactors<br><br>[Default] On Tue, 7 May 2013 09:22:19 +0200,"Boll, Martin Dr."<br>
<<a href="mailto:boll.bn@t-online.de" target="_blank">boll.bn@t-online.de</a>> wrote:<br><br>>You have to calculate the free space in order to get the real air-speed in<br>this area.<br>>I think even if that is naturally not the true surface-speed on the fuel,<br>
it is a good number to deal with.<br><br>I think in gasification they use the term "superficial velocity" a fictional<br>speed derived from the air volume and cross section of the chamber, the<br>actual speed of any given bit of air flow through the spaces will be much<br>
higher of course.<br><br>AJH<br><br>_______________________________________________<br>Stoves mailing list<br><br>to Send a Message to the list, use the email address<br><a href="mailto:stoves@lists.bioenergylists.org" target="_blank">stoves@lists.bioenergylists.org</a><br>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br>Josh Kearns<br>PhD Candidate, Environmental Engineering<br>University of Colorado-Boulder<div>Visiting Researcher, North Carolina State University</div><div>
<br><div>Director of Science</div><div>Aqueous Solutions </div><div><a href="http://www.aqsolutions.org" target="_blank">www.aqsolutions.org</a></div><div><br></div><div>Mobile: 720 989 3959<br>Skype: joshkearns<br><br><br>
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