太阳能蒸汽热风干燥系统的设计与研究

Design and research on solar steamy hot-air drying system

研制一套太阳能干燥系统,采用真空集热管对水加热,产生水蒸气,并转换成热风,实现对农产品的干燥作业。以胡萝卜作为样品进行干燥机的干燥性能试验,结果表明:当太阳辐射值达到750 W/m2以上时,蒸汽可以稳定工作5～7h;干燥室内高温工作段温度可以稳定在55℃左右,低温工作段温度可以稳定在40℃左右。干燥后的胡萝卜脱水率为82.3%～86.5%,干燥效果良好。

Designed and developed a set of solar drying systems,use the vacuum tube collector to heat water,the system can produce steam,and then converted it into hot air,realize the drying of agricultural products.The experiments of drying carrots were carried out to test the drying system＇s performance.The results show that when solar power reaches above 750 W/m2,the steam can stable work for 5～7 hours;The temperature of the dryer＇s high temperature section can be stabilized at around 55 ℃,and the temperature of the low can be stabilized at around 40 ℃.The dehydration rate of dried carrots is between 82.3% ～ 86.5%,drying effect is good.