4.1.Solar dryer systems with sensible heat storage 4.1.1. Indirect solar dryers
Jain, (2007) carried out a study on solar crop drying with reversed absorber plate type collector having natural air flow. Thermal storage materials affect natural mass flow rate in the drying system. The thermal model was developed based on energy equation. The reversed absorber, packed bed, inclined absorber and dryer are shown in fig. 5. The absorber plate with built-in thermal storage (Aboul-Enein, El-Sebaii, Ramadan, & El-Gohary, 2000) is inclined at 30o. 1 m length and 1 m breadth reversed absorber plate having 0.15 m packed bed could dry 95 kg of onion from a moisture content of 6.14–0.27 kg water/kg of dry substance in a 24 h drying period. In this type of solar dryer, no external power was required to operate dryer. Air flow takes place naturally due to the thermosyphon effect.M. Mohanraj and P.
4.1.Solar dryer systems with sensible heat storage 4.1.1. Indirect solar dryersJain, (2007) carried out a study on solar crop drying with reversed absorber plate type collector having natural air flow. Thermal storage materials affect natural mass flow rate in the drying system. The thermal model was developed based on energy equation. The reversed absorber, packed bed, inclined absorber and dryer are shown in fig. 5. The absorber plate with built-in thermal storage (Aboul-Enein, El-Sebaii, Ramadan, & El-Gohary, 2000) is inclined at 30o. 1 m length and 1 m breadth reversed absorber plate having 0.15 m packed bed could dry 95 kg of onion from a moisture content of 6.14–0.27 kg water/kg of dry substance in a 24 h drying period. In this type of solar dryer, no external power was required to operate dryer. Air flow takes place naturally due to the thermosyphon effect.M. Mohanraj and P.
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