in this paper, the performance of a double-exposure solar cooker has been studied experimentally. Therefore, two similar systems were designed, constructed and tested under the same climatic onditions; and the effects of reflected surface in the box and parabolic parts of doubleexposure solar cooker on its performance were studied. The results show that the flat mirrors in the box-type of the solar cooker affect about 18.5% and the mounted mirrors on the parabolic part affect about 25% on the performance of the solar cooker; also the effectiveness pattern of mounted mirrors on the parabolic curve on its performance has obtained. These results can be used in for the analysis, design and construction of new set up of these systems. This research was designed to develop double-exposure solar cooker performance and its tests were carried out in the Research Institute of Food Science and Technology, located at 36 latitude and 54 longitudes in Mashhad, Iran.

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