黑皮冬瓜空气能热泵干燥工艺参数优化

Optimization of Air Source Heat Pump Drying Process Parameters of Wax Gourd

该研究优化黑皮冬瓜空气能热泵干燥工艺参数,先通过单因素试验研究瓜片厚度、烘干温度及风速等参数对冬瓜干燥过程及瓜干明度指数、复水比和维生素C保留率等瓜干品质指标的影响,确定各参数的最适取值范围,采用正交试验及综合加权评分法优化确定冬瓜热泵干燥工艺参数最佳值分别为:温度60℃,风速1.5 m/s,切片厚度6 mm。在该工艺条件下制得的瓜干明度指数值为86.2,复水比为6.82,维生素C保留率为84.37%,综合评分为92.91分。研究结果为空气能热泵干燥技术应用于冬瓜干的规模化生产提供参考。

In order to optimize air source heat pump drying process parameters of wax gourd,effects of slice thickness,drying temperature and air speed on drying process of wax gourd and the brightness,rehydration rate and retention rate of ascorbic acid(VC)of dried wax gourd were investigated by using single factor experiment,and the best range of values of the process parameters were confirmed.Then the heat pump drying process parameters of wax gourd were optimized and confirmed by using orthogonal experiment and comprehensive weighted scoring method,and the results showed that:drying temperature was 60℃,air speed was 1.5 m/s,slice thickness was 6 mm.Under the optimal conditions,the brightness,rehydration rate,retention rate of VC and comprehensive scoring of dried wax gourd were 86.2,6.82,84.37%,92.91 respectively.The results provided references for the application of air source heat pump drying technology to the large-scale production of dried wax gourd.