Abstract
A durable solar cooker designed specifically with a view to fabrication in centralized workshops in developing countries is described. The mirror system comprises twelve identical 29.3-cm diameter concave glass mirrors mounted in a frame in a two-axis azimuthal mounting. By using an asymmetrical mirror system and positioning the horizontal axis of rotation at the center of curvature of the image field, all reflected radiation falls on the bottom—and not on the sides—of the cooking pot. Over 500 watts are delivered in bright sunlight. Except for the mirrors, the construction is entirely of iron and the total material cost (including mirrors) is under $8.
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