الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 211 |  |  |
| | | from | 211 | | |
Abstract
Banana is the most waste generation among economic plants in the field due to sequence operations done during production year around. Drying air characteristics; greenhouse solar drier effectiveness; banana tree residues and banana peels distribution way on drying trays are highlighted for drying process optimization. Dried banana wastes introduced for lamb feeding is investigated. Both energy and exergy analyses of the drying process of banana wastes, using three different solar collectors in geometric shape with three independent drying chambers having the same geometric dimensions (mixed-mode forced convection type solar drier), are presented. Banana wastes get sufficiently dried at temperatures between 30°C and 54°C. Throughout the experimental procedure, air relative humidity did not exceed 66%, and solar radiation ranged from 69.34 to 871.6W/m2. Drying air mass flow was maintained within the interval of 0.0130 to 0.0143kg/s. Under these experimental conditions, two days were needed to reduce the moisture content to approximately one-fifteenth of the original value, in particular from 14.153kgH2O/kg dry matter down to 0.9kgH2O/kg dry matter via Cylindrical solar drier. The Cylindrical solar collector has the highest effect on the drying air capacity which can increase it rapidly decreasing moisture content dramatically in the second day, with the highest drying rate of 0.0302kg H2O and drying efficiency of 46.2% for banana wastes with bed depth of 5cm and chopping length of 3cm and 32.5% for banana peels with bed depth of 5cm. Energy utilization ratio for Cylindrical, Quonset and Trapezoidal solar driers is 48.77, 52.06 and 55.58% respectively. The product with chopping length of 3cm has the highest pick-up efficiency with both bed depths of 5 and 8cm due to its higher specific surface area.