DESIGN, CONSTRUCTION AND TESTING OF A SOLAR DRYER WITH A COLLECTOR OF DOUBLE STEP AND POROUS MATRIX
DOI:
https://doi.org/10.59627/cbens.2016.1264Keywords:
solar hybrid dryer, porous matrix collectorAbstract
This paper presents the design, construction and experimental results of a solar dryer for food products. The dryer is a solar and electrical hybrid, indirect with respect to the incoming solar radiation, and forced convection. The dryer has a load capacity for 20 kg fresh product with a load dendity of 10 kg/m2 of tray, and is equipped with a solar air heater based on a double-pass porous matrix. The dryer chamber itself is a collector covered with 4 mm alveolar transparent polycarbonate. Construction details and experiments with different flowrates are presented in order to determine the optimum performance. The thermal efficiency curve for both the collector and the dryer is presented. Eficiency values about 54 % are obtained with an airflow of 0.06 m3/s.
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References
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