Cooking Food on a Box type Solar cooker With a Wiper Mechanism

The box type solar cooker has the Achilles heel of slow heating rate, limited amount of temperature it can deliver and its low efficiency of cooking. One of the drawbacks of the cooker is attributed to partial shading of water vapors on the inner surface of the glazing, which limits the intensity of radiation. This kind of cooker depends on the greenhouse effect in which the transparent glazing permits the passage of shorter wavelength solar radiation coming from relatively low temperature heated objects . Water boils at 100 oC at sea level pressure; droplets of water being formed on inner surface of glazing, thus reducing penetration of solar radiation into the cooking chamber.