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About: Mohammed Bah Abba     Goto   Sponge   NotDistinct   Permalink

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Mohammed Bah Abba (1964–2010) was a teacher from northern Nigeria who developed the pot-in-pot refrigerator in the 1990s. This refrigerator is extremely simple and does not require power, making it suitable for use in desert environments without easy access to electricity or repairs. It consists of a small glazed earthenware pot placed inside a larger unglazed one, with the space between the two filled with moist sand. The inner pot is filled with whatever is desired to be cooled (fruit, vegetables, drinks) and covered with a wet cloth. The evaporating water draws heat from the inside through the porous outer pot, cooling the interior by up to 14°C.