| Summary: | 碩士 === 崑山科技大學 === 機械工程研究所 === 101 === This research in consideration of the optimal temperature for drying of agricultural (65 ° C to 85 ° C), Maintaining the internal temperature of the solar dryer and reduce heat loss and to avoid overheating, deterioration caused by internal drying of agricultural products, will be a different structure and the heat transfer medium for improvement.
Study modules produced by entities (prototype of 54cm × 38cm × 52cm solar dryer cabinet), In order to obtain basic prototype temperature parameters, and with the heat flow software, change detail parameters in order to enhance overall efficiency. It changes parameters: heat medium (oil, water), wind speed (1 m / s, 2 m / s, 3 m / s), export ratio of the size (1:1,1:2,1:3,1 : 4,1:5,1:6), natural cooling (heating for 3 hours, cooled for 3 hours), the structure and adjust the speed change ratio of the entrance.
Study found that the dryer cabinet interior is dry air, the choice of oil as the heat transfer medium, the dryer cabinet temperature is about 65 ° C to 70 ° C, wind speed of 1 m / s, the wind speed increased by 1 m / s, the dryer cabinet temperature will drop 2 ° C to 4 ° C, therefore, use the size of the opening speed control, can be of different agricultural drying temperature to make adjustments. Software analysis found that the proportion of 1:4 and out vent, dryer cabinet temperature more uniform distribution of temperature difference between the upper and lower temperature is small.
Finally, the entity 54cm × 38cm × 52cm plus spoiler, the heat transfer medium oil tank solar dryer for three hours continuous sunshine test (800 W/m2), combined with a temperature measurement system retrieves the data and analysis were compared with the software, its temperature parameters are the same, there is no difference. Verify the correctness of software configuration and thermal efficiency of the dryer cabinet
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