<div dir="ltr"><div><div><div>Dear Stephen,<br><br></div>I'm not positive, but I believe the projected cost of the "sun bucket" is around 50 bucks.<br><br></div>Best,<br></div>David<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Jan 4, 2017 at 3:17 PM, Stephen Joseph <span dir="ltr"><<a href="mailto:joey.stephen@gmail.com" target="_blank">joey.stephen@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="ltr">Dear Ron and David<div><br></div><div>Storage cokers are great. We worked on a micro-hydro version in Nepal which was well accepted. I like the idea of integration with TLUD. I am wondering how much the phase change module is if mass produced as this will determine if people adopt it unless someone is prepared to subsidize.</div><div><br></div><div>Regards</div><span class="HOEnZb"><font color="#888888"><div>Stephen</div></font></span></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Jan 4, 2017 at 12:30 PM, Ronal W. Larson <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 style="word-wrap:break-word"><div>David and list - and cc some solar cooking friends</div><div><br></div><div><span class="m_4271392712682860487m_-5102632392814439502Apple-tab-span" style="white-space:pre-wrap"> </span>Congratulations on this modification of the usual solar cooker. And on the two awards that Sun Buckets has already won.</div><div><br></div><div><span class="m_4271392712682860487m_-5102632392814439502Apple-tab-span" style="white-space:pre-wrap"> </span>It might seem you are on the wrong list - as we get little traffic re solar cookers - and our “biomass” address would suggest this is normally be the wrong place. But I see three connections (that I have mentioned recently to the ccs), that make this entirely appropriate for out stove list.</div><div><br></div><div><span class="m_4271392712682860487m_-5102632392814439502Apple-tab-span" style="white-space:pre-wrap"> </span>a). There could be reasons to employ the same storage concept at a family (maybe neighborhood) level with any form of biomass stove. I think it would fit especially well with TLUD stoves - as they could be designed at a large (one full day of cooking) size - and one day’s cooking could be much less time consuming than at present. No solar involvement at all in approach a).</div><div><br></div><div><span class="m_4271392712682860487m_-5102632392814439502Apple-tab-span" style="white-space:pre-wrap"> </span>b). There could be good reason for option a) (such as very high fuel costs) to also want to couple a fully biomass approach with (zero fuel cost ) solar. </div><div><br></div><div><span class="m_4271392712682860487m_-5102632392814439502Apple-tab-span" style="white-space:pre-wrap"> </span>c). Every solar option needs a backup - and biomass is the usual choice (except in the USA).</div><div><span class="m_4271392712682860487m_-5102632392814439502Apple-tab-span" style="white-space:pre-wrap"> </span>The backup need not make charcoal - but the solar cookers can never be carbon negative; TLUDs can make that happen. Which won’t happen normally with a liquid (LPG) etc.</div><div><br></div><div><span class="m_4271392712682860487m_-5102632392814439502Apple-tab-span" style="white-space:pre-wrap"> </span>So I’d like to continue this dialog with anyone interested. Because of all the option a), b), c) possibilities, this dialog could remain on this list. I suggest we stay away from the solar-only topic you brought to us. And we can leave this list if a few think it is detracting from our biomass stove dialog.</div><div><br></div><div><span class="m_4271392712682860487m_-5102632392814439502Apple-tab-span" style="white-space:pre-wrap"> </span>I was employed at what is now NREL in Golden Colorado and have several friends with extensive experience in high temperature thermal storage (even little myself). I’ve been a member of SCI on and off.</div><div><br></div><div><span class="m_4271392712682860487m_-5102632392814439502Apple-tab-span" style="white-space:pre-wrap"> </span>My friend Dr. Salih Hamadto (in Khartoum Sudan) has sold many concentrators of the Scheffler variety - which I think might end up being a preferred approach - instead of paraboloids. All the ccs know about biochar - which I think has a much more natural fit with your nice idea than our rocket enthusiasts.</div><div><br></div><div>Ron</div><div><br></div><div><br></div><div><br></div><br><div><blockquote type="cite"><div>On Jan 3, 2017, at 12:51 PM, David Stein <<a href="mailto:ambwat@gmail.com" target="_blank">ambwat@gmail.com</a>> wrote:</div><br class="m_4271392712682860487m_-5102632392814439502Apple-interchange-newline"><div><div dir="ltr"><p class="MsoNormal"><span style="font-family:"arial","sans-serif"">D<font size="2">ear All,</font></span></p><p class="MsoNormal"><span style="font-family:"arial","sans-serif""><font size="2"><br></font></span></p><font size="2">
</font><p class="MsoNormal"><font size="2"><span style="line-height:115%;font-family:"arial","sans-serif"">I am a newcomer to the Stoves list but I’ve spent some
time in the household energy sector in developing Vanuatu which is where I met
Nikhil.</span></font></p><p class="MsoNormal"><font size="2"><span style="line-height:115%;font-family:"arial","sans-serif""><br></span></font></p><font size="2">
</font><p class="MsoNormal" style="line-height:normal"><font size="2"><span style="font-family:"arial","sans-serif"">I am fascinated by solar cooking these days.<span> </span>There are many potential socio-economic and
environmental benefits of solar cooking and they are all very seductive.<span> </span>Just thinking about fuel-free and
emission-free cooking is intoxicating.</span></font></p><p class="MsoNormal" style="line-height:normal"><font size="2"><span style="font-family:"arial","sans-serif""><br></span></font></p><font size="2">
</font><p class="MsoNormal" style="line-height:normal"><font size="2"><span style="font-family:"arial","sans-serif"">However, it seems that it is difficult to
achieve the potential benefits of solar cooking (especially in the developing
world) largely because those that dwell in hot climates (which is where much of
the developing world seems to be located) have developed lifestyles that
minimize exposure to the sun whereas most methods of solar cooking require the
cook to be out in the sun, often at times of the day that aren’t typical
cooking times.<span> </span>These facts make the
difficult task of changing the cooking habits of cooks even more challenging.</span></font></p><p class="MsoNormal" style="line-height:normal"><font size="2"><span style="font-family:"arial","sans-serif""><br></span></font></p><font size="2">
</font><p class="MsoNormal" style="line-height:normal"><font size="2"><span style="font-family:"arial","sans-serif"">But it appears as though the Sun Bucket </span><a href="http://www.sunbuckets.com/" target="_blank"><span style="font-family:"arial","sans-serif"">http://www.sunbuckets.com/</span></a><span style="font-family:"arial","sans-serif""><span> </span>“cracks all of these nuts.”<span> </span>This amazing innovation is “charged” with the
heat of sunshine and the heat is stored in a “sun bucket” (phase change
“”battery”) where it can be used when (like in the evening or early morning)
and where (like inside a kitchen) it is needed.<span>
</span>It cooks as hot as cooking on fire and existing cooking pots and pans
can be used so there is minimal need for changes in cooking behavior.<span> </span>It also seems very affordable.<span> </span>I guess it’s what they call transformational. <br></span></font></p><p class="MsoNormal" style="line-height:normal"><font size="2"><span style="font-family:"arial","sans-serif""><br></span></font></p><font size="2">
</font><p class="MsoNormal" style="line-height:normal"><font size="2"><span style="font-family:"arial","sans-serif"">It looks as though a Sun Bucket should be a
part of every integrated coking scheme (solar cooking when it's sunny, using an
Improved Cook Stove when it's not, and maybe using a retained heat cooker with
both) everywhere the sun shines in the developing world.<span> </span>I can hardly wait for the Sun Bucket to be
unleashed to the world-wide market of cooks that could really use them.</span></font></p><p class="MsoNormal" style="line-height:normal"><font size="2"><span style="font-family:"arial","sans-serif""><br></span></font></p><font size="2">
</font><p class="MsoNormal" style="line-height:normal"><font size="2"><span style="font-family:"arial","sans-serif"">Best wishes for the coming year.</span></font></p><font size="2">
</font><p class="MsoNormal" style="line-height:normal"><font size="2"><span style="font-family:"arial","sans-serif"">David Stein</span></font></p>
</div>
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