THERMAL PERFORMANCE AND EVALUATION OF TWO TYPES LOW COST SOLAR COOKERS

Document Type : Original Article

Author

Lecturer of Agricultural Engineering, Faculty of Agriculture, Zagazig University, Egypt.

Abstract

Solar cookers have attracted the attention of many researchers so far. Different types of solar cookers have been developed and tested all over the world. There has been a considerable interest recently in the design, development and testing of various types of solar cookers. In this study the box type of cooker was selected to apply some experimental measurements to evaluate its thermal performance. It is more commonly used than the concentrator type for cooking at noon since it is both cheaper and simpler to construct and operate. The temperature above 100 ◦C can be achieved in such a cooker. This range of temperatures is suitable for cooking by boiling. This study was constructed in faculty of agriculture, Zagazig University (2011). The obtained data showed that, the temperature of the absorber plate reached to 110 οC and 95 οC at 13:00 pm and 14:00 pm with 0.5 kg of water in the case of using carton and aluminum box types respectively. The standardized cooking power was found to be inversely proportional to temperature difference (Tw-Tamb). The values of  increased when the load increased for both types of cookers. The cost analysis indicates that using solar cooker is very economically. The hourly operational cost is about 50% of that the gas cooker.

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References

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Misr Journal of Agricultural Engineering
Volume 29, Issue 1
January 2012
Pages 395-408

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