The comparison of three types of Indonesian solar box cookers

This gaper describes the influences which govern solar box cookers: HS 7534 , HS 7033 and the newest design HS 5521. The best of solar cooker, type HS 7033 gave oven temperature of 202 degrees C between 12:00 and 12:45 p.m, on October 7, 1997. Thirty-four units of this type have been field tested sin ce September 1997. It was found that these solar cookers have a good heat s torage capability, therefore they can be used for consecutive cooking. The optimization of the size, the aperture area, the insulator thickness, the o ven volume and the reflector area leads to a new design, type HS 5521. Its volume is only 35% of the volume of HS 7033 and cheaper. The performance co mparison of the last two solar cookers are described based on the data coll ected during testing with and without load. The HS 5521 has the same heat c ollection rate and is able to cook as fast as HS 7033. (C) 2000 Elsevier Sc ience Ltd. All rights reserved.