<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1430325998482_7907"><span id="yui_3_16_0_1_1430325998482_7906">Hi all check this information, this not to desing the cooking divice this information to prepare food</span></div><div id="yui_3_16_0_1_1430325998482_7907"><span><br></span></div><div id="yui_3_16_0_1_1430325998482_7907" dir="ltr"><img src="http://vignette1.wikia.nocookie.net/solarcooking/images/d/d9/Heat-retention_cooking_times.gif/revision/latest/scale-to-width/550?cb=20070105210631" alt="Heat-retention cooking times" class="" style="" id="yui_3_16_0_1_1430325998482_8056"><span><br></span></div><div id="yui_3_16_0_1_1430325998482_7907"><span><br></span></div><div id="yui_3_16_0_1_1430325998482_7907" dir="ltr"><img src="http://vignette2.wikia.nocookie.net/solarcooking/images/8/8a/Suggested_RHC_cooking_times_HELPS_International.jpg/revision/latest/scale-to-width/400?cb=20121129183045" alt="Suggested RHC cooking times HELPS International" class="" style="" id="yui_3_16_0_1_1430325998482_8013" data-id="e95df45b-214d-a050-cb89-16f8e68f31c3"><span><br></span></div><div id="yui_3_16_0_1_1430325998482_8058"><br></div><div id="yui_3_16_0_1_1430325998482_8059">Best Regad</div><div id="yui_3_16_0_1_1430325998482_8060"><br></div><div id="yui_3_16_0_1_1430325998482_8061">Gustavo</div> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1430325998482_7810"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1430325998482_7809"> <div dir="ltr" id="yui_3_16_0_1_1430325998482_7904"> <hr size="1" id="yui_3_16_0_1_1430325998482_7956"> <font size="2" face="Arial" id="yui_3_16_0_1_1430325998482_7905"> <b id="yui_3_16_0_1_1430325998482_8063"><span style="font-weight:bold;" id="yui_3_16_0_1_1430325998482_8062">From:</span></b> Dean Still <deankstill@gmail.com><br> <b><span style="font-weight: bold;">To:</span></b> Discussion of biomass cooking stoves <stoves@lists.bioenergylists.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Wednesday, April 29, 2015 8:00 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [Stoves] haybox cooking<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1430325998482_7808"><br><div id="yiv5159813181"><div dir="ltr" id="yui_3_16_0_1_1430325998482_7807"><div class="yiv5159813181MsoNormal" id="yui_3_16_0_1_1430325998482_7974">Hi Andrew,</div><div class="yiv5159813181MsoNormal" id="yui_3_16_0_1_1430325998482_7903"><br></div><div class="yiv5159813181MsoNormal" id="yui_3_16_0_1_1430325998482_8057">I found the following in my old computer. I think that it's fairly right.</div><div class="yiv5159813181MsoNormal" id="yui_3_16_0_1_1430325998482_7902"><br></div><div class="yiv5159813181MsoNormal" id="yui_3_16_0_1_1430325998482_7901">Dean</div><div class="yiv5159813181MsoNormal" id="yui_3_16_0_1_1430325998482_7900"><br></div><div class="yiv5159813181MsoNormal" id="yui_3_16_0_1_1430325998482_7975">Design Principles for a Retained Heat Cooker</div>
<div class="yiv5159813181MsoNormal" id="yui_3_16_0_1_1430325998482_8064"> </div>
<div class="yiv5159813181MsoNormal" style="margin-left:0.5in;" id="yui_3_16_0_1_1430325998482_7899">1.)<span style="font-stretch:normal;font-size:7pt;"> </span>Air
exchanges are more important than insulation</div>
<div class="yiv5159813181MsoNormal" style="margin-left:1in;" id="yui_3_16_0_1_1430325998482_7976">A.)<span style="font-stretch:normal;font-size:7pt;"> </span>Make the
enclosure as air tight as possible</div>
<div class="yiv5159813181MsoNormal" style="margin-left:1in;" id="yui_3_16_0_1_1430325998482_7898">B.)<span style="font-stretch:normal;font-size:7pt;"> </span>Use
R-7 insulation at a minimum</div>
<div class="yiv5159813181MsoNormal" id="yui_3_16_0_1_1430325998482_7806"> </div>
<div class="yiv5159813181MsoNormal" style="margin-left:0.5in;" id="yui_3_16_0_1_1430325998482_7977">2.)<span style="font-stretch:normal;font-size:7pt;"> </span>The
mass of the insulation and any mass within the envelope of insulation will rob
heat from the pot of food unless the mass is above simmering temperatures.</div>
<div class="yiv5159813181MsoNormal" style="margin-left:1in;" id="yui_3_16_0_1_1430325998482_7978">A.)<span style="font-stretch:normal;font-size:7pt;"> </span>Keep
insulation and inner walls of the retained heat cooker as light as possible.</div>
<div class="yiv5159813181MsoNormal" style="margin-left:1in;" id="yui_3_16_0_1_1430325998482_7979">B.)<span style="font-stretch:normal;font-size:7pt;" id="yui_3_16_0_1_1430325998482_7980"> </span>To
work well insulation should not be less than R-2 per inch of thickness.</div>
<div class="yiv5159813181MsoNormal" style="margin-left:1in;" id="yui_3_16_0_1_1430325998482_7981">C.)<span style="font-stretch:normal;font-size:7pt;"> </span> Full pots of near boiling temperature food
retain more heat and cook food more effectively.</div>
<div class="yiv5159813181MsoNormal" id="yui_3_16_0_1_1430325998482_7982"> </div>
<div class="yiv5159813181MsoNormal" style="margin-left:0.5in;">3.)<span style="font-stretch:normal;font-size:7pt;"> </span>Conduction
looses more heat than convection. Convection looses more heat than radiation.</div>
<div class="yiv5159813181MsoNormal" style="margin-left:1in;">A.)<span style="font-stretch:normal;font-size:7pt;"> </span>Lift the
pot up off the floor of the box using a non-conductive material. Leave an air
gap of .5 inch.</div>
<div class="yiv5159813181MsoNormal" style="margin-left:1in;">B.)<span style="font-stretch:normal;font-size:7pt;"> </span>The
walls and ceiling of the box optimally should be .5 inch bigger than the pot.</div>
<div class="yiv5159813181MsoNormal"> </div>
<div class="yiv5159813181MsoNormal" style="margin-left:0.5in;">4.)<span style="font-stretch:normal;font-size:7pt;"> </span>Insulation
looses its ability to slow the passage of heat when slightly moist.</div>
<div class="yiv5159813181MsoNormal" style="margin-left:1in;">A.)<span style="font-stretch:normal;font-size:7pt;"> </span>Do not
allow moisture to contact the insulation.</div>
<div class="yiv5159813181MsoNormal" style="margin-left:1in;">B.)<span style="font-stretch:normal;font-size:7pt;"> </span>Use a
moisture proof barrier between the pot and the insulation.</div>
<div class="yiv5159813181MsoNormal" style="margin-left:1in;">C.)<span style="font-stretch:normal;font-size:7pt;"> </span>Use a
closed cell insulation.</div>
<div class="yiv5159813181MsoNormal"> </div>
<div class="yiv5159813181MsoNormal" style="margin-left:0.5in;">5.)<span style="font-stretch:normal;font-size:7pt;"> </span>The
inner box will grow mold.</div>
<div class="yiv5159813181MsoNormal" style="margin-left:1in;">A.)<span style="font-stretch:normal;font-size:7pt;"> </span>The inner
surface should be easy to clean.</div>
<div class="yiv5159813181MsoNormal" style="margin-left:1in;">B.)<span style="font-stretch:normal;font-size:7pt;"> </span>Cloth
will become unsanitary if unprotected.</div>
<div class="yiv5159813181MsoNormal"> </div>
<div class="yiv5159813181MsoNormal" style="margin-left:0.5in;">6.)<span style="font-stretch:normal;font-size:7pt;"> </span>To
cook pinto beans</div>
<div class="yiv5159813181MsoNormal" style="margin-left:1in;">A.)<span style="font-stretch:normal;font-size:7pt;"> </span>They need
to be pre-soaked</div>
<div class="yiv5159813181MsoNormal" style="margin-left:1in;">B.)<span style="font-stretch:normal;font-size:7pt;"> </span>The
retained heat cooker needs to be able to keep 5 liters of water above 90C for
90 minutes.</div>
<div class="yiv5159813181MsoNormal"> </div>
<div class="yiv5159813181MsoNormal"> </div>
<div class="yiv5159813181MsoNormal"> </div>
<div class="yiv5159813181MsoNormal"> </div></div><div class="yiv5159813181gmail_extra"><br><div class="yiv5159813181gmail_quote">On Wed, Apr 29, 2015 at 1:41 AM, Andrew Heggie <span dir="ltr"><<a rel="nofollow" ymailto="mailto:aj.heggie@gmail.com" target="_blank" href="mailto:aj.heggie@gmail.com">aj.heggie@gmail.com</a>></span> wrote:<br><blockquote class="yiv5159813181gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hi all<br>
<br>
I've been playing with cooking kidney beans and wonder if any cooks<br>
out there have any insights in using retained heat cookers. I've gone<br>
slightly hitech in that I have cut a recess in some wall insulation<br>
board for the pot to sit in. As I'm only using a cupful of dried<br>
beans, pre soaked for 24 hours I think my chief mistake is not having<br>
enough food mass to retain the heat and so I'm having to re boil the<br>
beans after 5 hours. Unfortunately my data logger will not function<br>
above 80C and I'm unsure at what temperature cooking effectively<br>
stops.<br>
<br>
My question is does the boiled water have to be discarded from the beans?<br>
<br>
What I am wondering is could rice be added and the whole contents be<br>
reboiled and left as the rice cooks?<br>
<br>
Any suggestions for non meat, low sodium, flavourings to enhance the taste?<br>
<br>
Andrew<br>
<br>
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