<div dir="auto">Dear Ron,<div dir="auto">I fabricated a bath water heater in which the water was heated in a 3 litre container. The container was sealed at the top with only the inlet and outlet jutting out of the top. The inlet and outlet were joined to an insulated plastic barrel of 40 litre capacity. The container to be heated was surrounded by an insulated </div><div dir="auto">jacket. Starting temperature of water was 28 C. The pot was heated on a LPG stove. Hot water got transported into the insulated barrel by heat siphon. Experiment was stopped when water in the barrel reached 50C. Calories used were calculated on the basis of reduction in weight of LPG cylinder. Calories utilised were calculated on the basis of rise in water temperature in the barrel and volume of water in the barrel. Experiment was repeated for 5 days, one expt a day. </div><div dir="auto">Yours Karve</div></div><div class="gmail_extra"><br><div class="gmail_quote">On 15-Nov-2017 09:32, "Ronal W. Larson" <<a href="mailto:rongretlarson@comcast.net">rongretlarson@comcast.net</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word"><div>AD: cc list</div><div><br></div><div><span class="m_-625511835013774717Apple-tab-span" style="white-space:pre-wrap"> </span>The 90% number here is extraordinarily high. Ca you give more details?</div><div><br></div><div>Ron</div><div><br></div><div><br></div><br><div><blockquote type="cite"><div>On Nov 14, 2017, at 4:29 PM, Anand Karve <<a href="mailto:adkarve@gmail.com" target="_blank">adkarve@gmail.com</a>> wrote:</div><br class="m_-625511835013774717Apple-interchange-newline"><div><div dir="ltr"><h2><span style="font-size:12pt;font-family:Calibri,sans-serif;font-weight:normal;background-image:initial;background-size:initial;background-origin:initial;background-clip:initial;background-position:initial;background-repeat:initial">Dear Karolina,<span></span></span></h2><p class="MsoNormal">The pot, which is kept on the stove, should be provided with
a well insulated jacket which makes the flue gases pass through the gap between
the pot and its jacket. We obtained 90% efficiency with such pots, when tested on stoves using either LPG or charcoal. I am quite sure that it would work in the case of biogas too. The
practical difficulty with this solution is that one has to have a jacket for every pot. </p><p class="MsoNormal">Yours</p><p class="MsoNormal">A.D.Karve</p></div><div class="gmail_extra"><br clear="all"><div><div class="m_-625511835013774717gmail_signature" data-smartmail="gmail_signature">***<br>Dr. A.D. Karve<br><br>Chairman, Samuchit Enviro Tech Pvt Ltd (<a href="http://www.samuchit.com/" target="_blank">www.samuchit.com</a>)<br><br>Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)<br></div></div>
<br><div class="gmail_quote">On Mon, Nov 13, 2017 at 12:51 PM, Karolina Hagegård <span dir="ltr"><<a href="mailto:karolinahagegard@gmail.com" target="_blank">karolinahagegard@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div>Hi</div><div dir="auto"><br></div><div dir="auto">I'm currently in Kenya, trying to start up a biogas company:</div><div dir="auto"><br></div><div dir="auto"><a href="https://karolinabiogas.wordpress.com/present-project/" target="_blank">https://karolinabiogas.wordpre<wbr>ss.com/present-project/</a></div><div dir="auto"><br></div><div dir="auto">I'm having problems finding proper biogas stoves!</div><div dir="auto"><br></div><div dir="auto">Yesterday I had a meeting with a local stoves expert. He sells extremely efficient insulated stoves for firewood, or the husks of coconuts, or "any solid combustible material that you want to put in", and he also sells completely uninsulated biogas burners. So I asked if he wouldn't be interested in developing an insulated biogas stove for me, by the same principle as the firewood stove he had, and I'd be selling it together with my digesters. To my surprise, he wasn't!... He said that in his experience, gas needs lots of air, so you couldn't insulate it... Is it true? I told him I'd think about it and get back to him.</div><div dir="auto"><br></div><div dir="auto">This morning, I googled, WITH quotation marks, "insulated biogas stove". There were no direct hits. I tried "insulated biogas cooker" and "insulated biogas burners" but still no hits...</div><div dir="auto"><br></div><div dir="auto">So how is it? Is it really true that you can't make an insulated biogas stove? What's the most energy efficient alternative I can go for?</div><div dir="auto"><br></div><div dir="auto">Most grateful for any advice!</div><div dir="auto"><br></div><div dir="auto">/Karolina</div><div dir="auto">Kenya</div><div dir="auto"><br></div></div>
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