[Stoves] Solar energy for the non-cooking part of household energy

[Andrew Heggie]

Reduced file attached

Andrew



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> From: Stoves <stoves-bounces at lists.bioenergylists.org> On Behalf Of Andrew Heggie
> Sent: Thursday, September 20, 2018 4:05 AM
> To: Discussion of biomass cooking stoves <stoves at lists.bioenergylists.org>
> Subject: [Stoves] Solar energy for the non-cooking part of household energy
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> Please find below post from rom Dale Andreatta I have had to strip the
> attachment as it was too large but will see if it can be shrunk
> sufficiently to send to the list. Andrew :
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> In the developing world much of the household energy goes for cooking,
> as we all know, but there are significant energy needs at lower
> temperatures for which solar energy can be easily applied. I’ve done
> some work this summer to see how a very simple solar collector can be
> used to:
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> Heat water for washing or bathing
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> Dry grain
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> Dry firewood
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> Preheat water to be used for cooking
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> Pasteurize drinking water
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> Heat water for space heating (8 20-liter buckets can provide
> significant space heating if they are used properly)
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> The idea is that if people are currently using fuel to do any of these
> tasks and can reduce that fuel use by using solar instead, that’s the
> same as having a fuel efficient stove. It is believed that about a
> billion people currently boil their drinking water with fuel, on many
> days they can use the sun to pasteurize it instead.
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> The device is basically a tent with a clear plastic top and a black
> plastic floor, into which you put things to be heated or dried. It
> can perform several of the above functions at once, and the user would
> decide which functions to use.
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> The wood drying application may be of special interest to stovers. I
> dried a piece of large wood, green off the tree, to about 18% moisture
> in 3 days, much easier to burn. The dry wood also releases more
> energy as it burns since it’s not using its own energy to boil off its
> own water.
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> You can see the device in the short youtube video at:
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> https://youtu.be/PlXmttxNeEs (where the thing between the P and the
> X is a lower case ell)
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> and the attached document has lots of technical details.
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> Dale Andreatta, Ph.D., P.E.
>
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