The Hybrid Solar Dryer Cabinet
Keywords:
hybrid dryer cabinet, relative humidity, wet basisAbstract
The objectives of this research are to increase the efficiency of food preservation from solar energy. The solar dryer for food has limited in the production process from heat radiation some seasons product drying is not possible, such as the rainy season or when the sky is covered with clouds, causing the sunlight to not reach. This paper concern with the study of thermal efficiency of the bananas dryer by the solar drying cabinet size 45 cm x 108 cm x 38.5 cm. and 45° of the mirror angle installation thermometer and humidity meter inside and outside of solar dryer cabinet. Fermented 144 pieces of bananas were a product for drying. It was found from the experiment that, in the duration of 9.00 a.m. – 5.00 p.m. on a clear sky day, and all – day average temperature inside the chamber was 46.93°C. The experiment was started from a sample product with an average of 46.93 g, an average final weight of 23.41 g and initial moisture content of bananas were dried a final moisture content equaled 29.6% wet basis. For these data to design the hybrid solar dryer cabinet by using solar energy and hot air from a fin heater electric power 1800 watts with PID controller system. On a rainy and cloudy day the experiment was started from sample product an average of 49.64 g, an average final weight of 22.89 g, and the initial moisture content of bananas was dried a final moisture content equaled 28.0 %wet basis all – day the average temperature inside the chamber was 51.86°C. When comparing the color and final weight of the product are similar, and in the test the product has no loss during production. The size of the hybrid solar dryer cabinet is suitable for use in household agricultural products processing or community product processing. The products obtained by drying with this integrated solar dryer are of high quality and hygienic hygiene.
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