A passive flat plate collector solar dryer (FPC‐SD) was designed and fabricated for drying of agricultural products. It has drying capacity of 7.5 kg, drying chamber cross sectional area of 0.74 m × 0.58 m, collector aspect ratio 2, collector depth of 0.25 m and hence volume of 0.5 m³. Total pressure drop across drying bed ΔP_T was 1.29 kg/m². The difference between the dryer inlet and ambient temperature was recorded for certain days and was 24.6°C at 1.30 p.m. with average solar insolation of 882.35 W/m². Performance of FPC‐SD was evaluated by drying mushroom under sun drying and passive FPC solar dryer. The moisture ratio of the samples reached zero in 33 hr for sun drying while 21 hr for FPC‐SD. Solar drying took 36.36% lesser time than open sun drying.

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农产品被动平板集热太阳能干燥机的设计与性能评估

设计和制造了用于干燥农产品的无源平板集热太阳能干燥机（FPC-SD）。它的干燥能力为7.5 kg，干燥室的横截面积为0.74 m×0.58 m，收集器的纵横比为2，收集器的深度为0.25 m，因此体积为0.5 m ³。跨干燥床ΔP总压降_Ť为1.29千克/米²。记录某些天的干燥机入口与环境温度之间的差异，该差异在1.30 pm时为24.6°C，平均日照量为882.35 W / m ²。FPC-SD的性能通过在日光干燥和被动FPC太阳能干燥机下干燥蘑菇来评估。样品的水分比在33小时内达到零，以进行日晒，而在FPC-SD中则为21小时。与露天晒干相比，太阳能晒干所花费的时间减少了36.36％。