[Stoves] Sun Buckets: off topic news, introduction (David Stein)

[Bernhard Müller]

David and all:
these PCM devices like the Sun Bucket are existing in multiple versions but most of them not (yet) ready for mass production. Salts are corrosive. Parrafin wax works up to 120°C only. Sugars have a poor heat conduction. In every case one should keep in mind that these items are delivering only the energy that has been put into the PCM unit before. 
In combination with solar cookers and/or TLUD gasifiers I obtained best results with basket style fireless cookers, made by tenthousands in East Africa by women initiatives. Projects in Togo and Eastern Congo are just now conducted. The advantage, except that the baskets are a lot cheaper: the heat for cooking has been transferred into the food and not to a separate device. It does not lose a lot of energy via the sides and the top of the pot. What women love most: the fireless cookers work as a cooker, a warmer and a cooler. Yoghurt can be processed. The energy input (fuel) deduction ratio is at about 50%. Look at the instructions at my paper and be convinced: http://www.mueller-solartechnik.com/EN_fireless.pdf <http://www.mueller-solartechnik.com/EN_fireless.pdf> 
A French version exists at the same web page.
Bernhard S. Müller, Lernen-Helfen-Leben e.V., Germany

> Am 04.01.2017 um 20:00 schrieb stoves-request at lists.bioenergylists.org:
> 
> Sun Buckets: off topic news, introduction (David Stein)

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