<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Arial; font-size: 12pt; color: #000000'>Selmar, and list (cc Paul):<br><br> The only (repeat ONLY) way to change from rapid boil to simmer is to reduce the heat application to the bottom of the pot. Paul is doing this with a blower/fan - sometimes felt inappropriate, on this list, for remote areas. But there are obvious advantages to a blower/fan - and many are doing that - given the really low power levels required and the growing availability and lowering cost of photovoltaics. Thermoelectric systems are also on the market to power the blower/fan.<br><br> With your stove, you can move the pan higher. <br><br> You might be able to change the height of the chimney above the secondary air holes - probably not a good choice.<br><br> If the primary air holes are on the bottom of the TLUD, you might be able to push sand or something to reduce air flow.<br><br> But you can also change the size of the primary air holes, where-ever they are. One simple way is to insert a plug of suitable shape. You might have a geometry that would allow sliding or rotating something into place over one or more ot the primary air holes.<br><br> I've tried to be exhaustive. Anyone think of a power-level-control approach I've missed?<br><br> You should be able to reduce the maximum power level by a factor of two or three - enough to get a simmer. Paul, with his quite different burner arrangement, is getting a much larger turn-down factor.<br><br> Please keep us informed of the approach you have chosen and your success.<br><br>Ron<br><br><hr id="zwchr"><b>From: </b>"Paul Olivier" <paul.olivier@esrla.com><br><b>To: </b>"Discussion of biomass cooking stoves" <stoves@lists.bioenergylists.org><br><b>Sent: </b>Sunday, September 11, 2011 1:36:31 AM<br><b>Subject: </b>Re: [Stoves] rate of gasification<br><br>Selmar,<br><br>Please see: <a href="http://esrla.com/pdf/landfill_06.pdf" target="_blank">http://esrla.com/pdf/landfill_06.pdf</a><br><br>Thanks.<br>Paul<br><br><div class="gmail_quote">On Sun, Sep 11, 2011 at 1:39 PM, GemCo Forestry <span dir="ltr"><<a href="mailto:gemcof@gmail.com" target="_blank">gemcof@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><u></u>
<div>
<div><font face="Tahoma" size="2">I have made a tlud gasifier stove based on P
Aandersons instructions as found in his publication.I find that i can bring
4litres of water to the boil in a kettle placed on a tripod without a skirt in
15 minutes.The problem is that for the next nearly 35 minutes I should be able
to reduce the rate of gasification/temperature as for the type of food
traditionaly cooked(maize poridge and stews) the food shoul simmer and not kept
at the boil. Can any body make a sugestion please.</font></div>
<div><font face="Tahoma" size="2"></font> </div>
<div><font face="Tahoma" size="2">Selmar</font></div></div>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Paul A. Olivier PhD<br>27C Pham Hong Thai Street<br>Dalat<br>Vietnam<br><br>Louisiana telephone: 1-337-447-4124 (rings Vietnam)<br>Mobile: 090-694-1573 (in Vietnam)<br>
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