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【目的】研制太阳能集热器型干燥系统,研究山药下脚料干燥的工艺。【方法】研制利用太阳能为热能源的干燥装置,将山药下脚料进行清洗、切条处理并置于干燥箱内,利用白天太阳能热能、夜间停止供热的间歇干燥方法进行干燥,试验过程分量通过调节板调节。【结果】不同进风量对干燥速度影响显著;当环境温度约为-3℃,干燥室内的热空气流量为1.05 m3/min时,历时31 h可将山药下脚料干燥至安全水分。【结论】研制的太阳能集热器型干燥系统具有较好的集热性能,干燥室内空气流量大、空气流速快并且利用间歇干燥时,可以显著缩短山药下脚料的干燥时间。利用太阳能能够满足山药下脚料干燥工艺要求。
【Objective】 To develop a solar collector-type drying system to study the drying process of yam scraps. 【Method】 The drying device using solar energy as thermal energy source was developed. The yam scraps were cleaned, cut into strips and placed in a drying oven. The drying process was carried out by intermittent drying with solar energy during the day and heating at night. Adjustment plate adjustment. 【Result】 The results showed that different air volumes had a significant impact on the drying rate. When the ambient temperature was about -3 ℃ and the hot air flow in the drying chamber was 1.05 m3 / min, the yam scraps could be dried to safe moisture within 31 h. 【Conclusion】 The developed solar collector type drying system has better heat collecting performance. When the air flow in the drying chamber is large and the air flow rate is fast, and the intermittent drying is used, the drying time of yam scraps can be significantly shortened. Use of solar energy to meet the yam scraps drying process requirements.