响应面分析热风微波耦合干燥胡萝卜片的形变

Analysis on shrinkage of carrots slices dried by coupling hot air and microwave by response surface methodology

为减少干燥过程中的能耗,提高产品体积保留率,提出微波热风耦合干燥方法,运用响应面分析法对影响因素进行优化,提出干燥收缩数学模型,优化参数结果为微波功率密度1.9W/g,热风温度65℃,胡萝卜片厚度5mm为最佳组合参数,该参数下体积保留率提高10%,同时干燥能耗是传统热风干燥的21.27%。

In order to reduce the energy consumption in drying process and improve the volume retention ratio of the product,coupled microwave and hot air coupling drying method was used,response surface methodology was conducted to analysis the impact factors.The optimization parameters were： microwave power density 1.9 W/g,air temperature 65 ℃,the thickness of carrots 5 mm.Energy consumption in this way is as 21.27% times as that of the hot air drying,and the volume retention ratio can raise 10%.