[Stoves] Sun Buckets: off topic news, introduction

[David Stein]

Hi Ron,

I need to make a few disclaimers:

a) I am aware of the “biomass” state of things (that's why I put "off topic
news" in the subject line of my message) but
I just shared the Sun Buckets news because I thought it might be
interesting to people that are interested in developments in the cooking
energy sector.

b)I am not a salesperson for Sun Buckets.  Sorry if I came off that way.  I
have no investment in the Sun Buckets organization.  In fact I have nothing
to do with them.

c)I had no motive for my message other than spreading the word.

Having said all that; yes, I agree, every solar option needs a backup
(which is why I referred to integrated cooking in my message) - and biomass
is the usual choice.   TLUDs are a great idea!

Cheers,

David

On Wed, Jan 4, 2017 at 12:30 PM, Ronal W. Larson <rongretlarson at comcast.net>
wrote:

> David and list  - and cc some solar cooking friends
>
> Congratulations on this modification of the usual solar cooker.  And on
> the two awards that Sun Buckets has already won.
>
> 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.
>
> 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).
>
> 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.
>
> c).   Every solar option needs a backup - and biomass is the usual choice
> (except in the USA).
> 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.
>
> 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.
>
> 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.
>
> 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.
>
> Ron
>
>
>
>
> On Jan 3, 2017, at 12:51 PM, David Stein <ambwat at gmail.com> wrote:
>
> Dear All,
>
>
> 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.
>
>
> I am fascinated by solar cooking these days.  There are many potential
> socio-economic and environmental benefits of solar cooking and they are all
> very seductive.  Just thinking about fuel-free and emission-free cooking
> is intoxicating.
>
>
> 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.  These
> facts make the difficult task of changing the cooking habits of cooks even
> more challenging.
>
>
> But it appears as though the Sun Bucket http://www.sunbuckets.com/  “cracks
> all of these nuts.”  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.  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.  It also seems very
> affordable.  I guess it’s what they call transformational.
>
>
> 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.  I can hardly wait for the Sun
> Bucket to be unleashed to the world-wide market of cooks that could really
> use them.
>
>
> Best wishes for the coming year.
>
> David Stein
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