<p dir="ltr">Thanks Van.</p>
<p dir="ltr">Hussein </p>
<div class="gmail_quote">On 13 Jun 2016 3:54 p.m., "Sluis, Paul van der" <paul.van.der.sluis@philips.com> wrote:<br type='attribution'><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





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<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d">Dear Stovers,</span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d">A few answers to the many questions (in random order).</span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d">I have built a TEG powered stove with a windup generator as start up mode. You still need electronics to transfer power from the generator to the fan.</span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d">Biggest issues: not very practical to wind for 5 minutes and since it is mechanical not very reliable. So you need a start-up battery. Reliability is the biggest
 challenge in this market.</span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d">TEG’s are not reliable enough for stoves that are started and stopped many times. Plus the fact that solar prices have come down significantly, the Philips
 stove is now solar powered. That also solves the issue of people running the stove to create a small amount of electricity.</span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d">The price of a TEG stove with small battery or a solar stove with large battery is not very different. Both need electronics. Both have to be solidly build
 with quality materials. It all adds up. Then comes transport and import duties. That makes them relatively expensive.  </span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d">The Biolite stove that I have does have a start-up battery.</span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d">My personal view on biochar: I am afraid that the value as a fuel is so high that people will use it as fuel. Apart from that biochar is a wonderful soil amendment,
 specifically in certain soils.</span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d">For published papers on the Philips stove, just use google with ‘philips stove’. There is quit some information out there.
</span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d">My stove work is back to hobby level, since Philips decided to step out of this business.
</span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d">Kind regards,</span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
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<p><b><span style="font-size:10pt;font-family:'arial' ,;color:#1f497d">Dr. P. van der Sluis</span></b><span style="font-size:10pt;font-family:'arial' ,;color:#1f497d">                 
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<p><b><u><span style="font-size:24pt;font-family:'webdings';color:green">P</span></u></b><u><span style="font-size:10pt;font-family:'arial' ,;color:blue">
</span></u><span style="font-size:10pt;font-family:'comic sans ms';color:green">Take care of the environment, print only if necessary ...</span><span style="color:#1f497d"></span></p>
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<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
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<p><b><span style="font-size:10pt;font-family:'tahoma' ,">From:</span></b><span style="font-size:10pt;font-family:'tahoma' ,"> Stoves [mailto:stoves-bounces@lists.bioenergylists.org]
<b>On Behalf Of </b>Crispin Pemberton-Pigott<br />
<b>Sent:</b> vrijdag 3 juni 2016 17:41<br />
<b>To:</b> 'Discussion of biomass cooking stoves'<br />
<b>Subject:</b> Re: [Stoves] TEGs In-Reply-To=%3C9pc0kb1vrd6p4omok6ncg7iqig2cgfrf3j%404ax.com%3E</span></p>
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<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d">Dear Ron</span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
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<p>            
2.  Following the TEG theme though a little - could one save on costs considerably if you have a simple TEG that has no battery or grid connection?  
<span style="color:#1f497d"></span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d">Isn’t that how a Biolite stove works? Is there a batter in a Biolite? The originals didn’t as I recall.</span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
<p><span style="color:#1f497d">></span>One would only have power proportional to the stove thermal capabilities.
<span style="color:#1f497d"></span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d">Exactly. The major reason to have any battery at all is to speed the ignition and reduce the smoke during that time.</span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
<p><span style="color:#1f497d">></span>You would probably still need a control circuit that lowered fan speed, if needed to get the right stove power level.<span style="color:#1f497d"></span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d">Perfect.</span></p>
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<p><span style="color:#1f497d"> </span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d">If a hand-cranked fan could get the stove running, the TEG could keep it going. Perhaps that is technically the simplest solution.</span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d">Regards</span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d">Crispin</span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
<p><span style="font-size:11pt;font-family:'calibri' ,;color:#1f497d"> </span></p>
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