Afrigadget reports on Dominic Wanjihia's
invention:
An elevated metal box is lined interior and exterior with a fabric. In this case I used locally available corrugated galvanized iron sheets for the container and sisal sacking fabric for lining. The upper ends of the fabric overhang in a water trough that rings the top of the cooler. Capillary action causes the water to slowly trickle over the inner and outer surfaces. A small vent keeps the interior air circulating and wind guides or tunnels direct air flow over the exterior surfaces. A low speed small solar powered fan can be incorporated in areas where there is not a constant breeze...[continue reading]
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2 comments:
i saw the same idea used in Mali to keep vegetables cool and thus useable for a longer period. however, there they built a cube of about 2 metres x 2 metres x 2 metres, made of local mud, with doubled walls. the burlap hung between the walls, and air convection brought cool air into the interior storage. the big problem was having to haul water up to the tank on the roof.
super blog keep it up
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