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THERMAL - ECONOMICAL ANALYSIS AND COMPARISON BETWEEN PYRAMID CONFIGURATION AND SIGNAL SLOPE SOLAR STILLS

This paper presents an analytical study as well as thermal and economical comparison between two solar stills configurations; the Pyramidal and single slope. A mathematical model has been developed to simulate the two configurations and study their thermal performance. The weather meteorological data of Aswan City (south of Egypt) was used, and the daily total energy received by each still basin was calculated. The main performance parameters such as still productivity and efficiency have been presented for the whole year. In addition, the economical assessment of the distilled water production cost has been carried out. On the basis of the yearly performance results, the single slope still was found to be slightly more efficient and economical than the pyramidal one.