摘要
研究了杏鲍菇在不同热风温度、风速、物料尺寸、物料堆积层数等条件下的热风干燥特性,并建立热风干燥数学模型。试验表明:热风温度、风速、物料尺寸和物料堆积层数均显著影响杏鲍菇的热风干燥特性。热风温度越高、风速越快,杏鲍菇的干燥速率越快,干燥时间越短。当物料尺寸较小或物料单层干燥时,也能加快干燥速率,缩短干燥时间。杏鲍菇热风温度为80℃时干燥速率较快;风速为1.5 m/s时,杏鲍菇干燥速率较快,干燥时间较短;物料尺寸1 cm×1 cm,物料堆积层数为单层进行干燥时,干燥速率均较快。应用Matlab 7.0软件,采用高斯-牛顿运算法对5种干燥模型进行非线性回归拟合求解,并确定模型系数。结果发现Two-term模型具有较高的决定系数R2,较低的残差平方和SSE及均方根误差RMSE,该模型能准确地表达和预测杏鲍菇热风干燥过程的水分变化规律。
The hot-air drying characteristics of Pleurotus eryngii were studied in terms of different hot-air temperatures, air velocities, material size and accumulation layers of material, meanwhile a hot-air drying mathematical model was established. The test showed that these factors significantly affected the hot-air drying characteristics. Increasing the air temperature and velocity, or lowering size material, single accumulation layer could fasten the drying speed and shorten drying time of Pleurotus eryngii. The speed of a hot-air drying would be faster at air temperature of 80 ℃ with the material size of 1 cm × 1 cm, or single accumulation layer. When air velocity was 1.5 m/s, the drying speed increased as the drying time was shorted. The experimental drying data of Pleurotus eryngii was used to fit five available drying models by applying Matlab 7.0 and using Gauss-Newton algorithm, and the coefficients of models were determined by non-linear regression analysis. It was showed that Two-term model had higher correction coefficient （R2）, lower square sum of error value （SSE） and root mean square error value （RMSE）, which could exactly describe and predict the moisture dynamics of Pleurotus eryngii during hot-air drying process.
出处
《现代食品科技》
EI
CAS
北大核心
2013年第11期2692-2699,2579,共9页
Modern Food Science and Technology
基金
国家科技支撑计划资助项目(2007BAD07B06)
福建省高等学校新世纪优秀人才支持计划资助项目(闽教科〔2007〕20号)
福建省教育厅科技计划资助项目(JB10236)
福建漳州市自然科学基金资助项目(ZZ2012J07)
关键词
杏鲍菇
热风干燥
干燥特性
干燥模型
Pleurotus eryngii
hot-air drying
drying characteristic
drying model
