Simulation Of Indirect Solar Crop Dryers Augmented With Pebble-Bed Thrmal Storages

المؤلفون

  • E. Elbenghazi M.Sc. Senior Engineer, Th General Electrical Company, Libya
  • K. Agha Mechanical and Industrial Engineering Department, Faculty of Engineering, University of Tripoli, Tripoli, Libya
  • E. Dekam Mechanical and Industrial Engineering Department, Faculty of Engineering, University of Tripoli, Tripoli, Libya

الكلمات المفتاحية:

Air collector applications ، Indirect solar dryers، Rice and tomatoes preservation ، Natural hot air flow ، Natural buoyancy forces

الملخص

This paper presents a model of indirect solar dryer augmented with pebble bed thermal storage. The thermal storage system was considered to be placed inside the drying chamber above the 47°-tilted air solar collector and below the crop bed, where an average September-daily insolation profile was given for the 32°N location. A presented mathematical model took into consideration the pressure and natural buoyancy forces, employed the basic governing equations, atmospheric-air psychometric-chart relations, and published correlation relationships. A “QBASIC” computer program was written based on the trial and error method for the calculation of different parameters. Dimensions of the dryer system, position, and characteristics of the crop and storage beds, strongly affected the behavior of the dryer system, for both rice and tomato products.  Referring to the considered indirect solar dryer design type, on average two and five days were required for rice and tomatoes long-term drying, respectively. This seems to be visible in rice products, however, it is far from applicability for tomatoes mass-drying process in agricultural fields, due to its high initial moisture content.

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التنزيلات

منشور

2017-06-30

كيفية الاقتباس

Elbenghazi, E., Agha, K. ., & Dekam, E. . (2017). Simulation Of Indirect Solar Crop Dryers Augmented With Pebble-Bed Thrmal Storages. Solar Energy and Sustainable Development Journal, 6(1), 1–12. استرجع في من https://jsesd-ojs.csers.ly/ojs/index.php/jsesd/article/view/50

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