太阳能脱水车间湿差脱水技术研究

采用太阳能资源与西北干燥空气合理结合的方式,以娃娃菜为例进行脱水干燥实验研究。研究西北地区不同季节的气候条件,对娃娃菜实际脱水速度与理论空气脱水速度的影响。得出全年干燥参数。研究表明,干燥室满载脱水时,室外干空气绝对湿度显著低于室内,不论白天和夜间都可以有效辅助太阳能进行脱水,150kg娃娃菜全年干燥时间为28～72h,干燥效率保持在80%左右。夏季将最大节能79%,秋季最小节能47%。利用spss17.0软件对实验结果进行分析表明,Cubic模型拟合效果较理想。

Research of humidity difference dehydration technology in solar drying chamber

The drying process of cabbage was carried out by the solar energy along with dry atmosphere which was the characteristic in northwest of China.The relationship between the climatic conditions in the northwest region in different seasons and drying rate of cabbage in practice and in theory was examined.Based on this,annual drying parameters were determined.The results showed that the drying chamber packed with dehydration,the absolute humidity of outdoor drying air was significantly lower than that of indoor,no matter the night or the day,it can effectively aided solar drying.The drying time was 28~72h for 150kg cabbage.Annual drying efficiency could be maintained around 80%.The dehydration technology which was carried out by the humidity difference could effectively reduce the energy consumption.It saved 79% in summer and 47% in autumn,respectively.The experimental results showed that the Cubic model had satisfactory fitting goodness by using spss17.0 software.