苹果的太阳能干燥工艺优化.PDFVIP

28 2010, Vol. 31, No. 02 食品科学 ※工艺技术 1 2 , 1 2 2 2 2 高兴海 ，张永茂 * ，韩舜愈 ，黄 铮 ，张海燕 ，张 芳 ，庞中存 (1.甘肃农业大学食品科学与工程学院，甘肃 兰州 730070 ； 2.甘肃省农业科学院农产品贮藏加工研究所，甘肃兰州 730070) 采用太阳能与西北干燥空气资源合理结合的方式，对苹果切片进行脱水干燥实验研究，对果片厚度、装 载量、风速对苹果的干燥速率和生产能力的影响进行试验，得出最佳工艺参数。结果表明，果片厚度和装载量对 干燥速率和生产能力均有显著影响，而风速对干燥速率和生产能力影响不显著。采用切片厚度5mm 的苹果片，装 载量5kg/m2 ，风速1.5m/s 的太阳能干燥工艺，可以使干燥速率和生产能力的综合效果较好。将500kg 的苹果进行 太阳能干燥，84h 后，得到终水分为15% 的干果片44.3kg ，成品率为8.8% 。与传统热风干燥相比具有明显的节能 效果，节能率为69.2% 。 苹果；太阳能干燥；节能 Optimization of Solar Drying of Fresh Apple Slices by Orthogonal Array Design 1 2, 1 2 2 2 2 GAO Xing-hai ，ZHANG Yong-mao *，HAN Shun-yu ，HUANG Zheng ，ZHANG Hai-yan ，ZHANG Fang ，PANG Zhong-cun (1. College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China； 2. Institute of Agricultural Product Storage and Processing Research, Gansu Academy of Agricultural Sciences, Lanzhou 730070, China) Abstract ：The drying process of fresh apple slices with solar energy combined with abundant dry air resource in northwest China was investigated. The effects of apple slices thickness and loadage as well as air flow rate on water loss rate in apple slices were analyzed in single factor experiments. Based on this, the optimal value of three parameters were determined using orthogonal array design for reaching a good compromise between drying rate and productivity. Results indicated that both thickness and loadage of apple slices gave a significant influence on drying rate and productivity, whereas no significant influence of air flow rate was observed. As expected, a