南瓜片太阳能—热泵联合干燥特性及动力学模型  

Drying characteristics and dynamic analysis of pumpkin slices using solar-assisted heat pump drying

作　　者：代亚萍 邓凯波[1,2,3] 郑宝东 DAI Yaping;DENG Kaibo;ZHENG Baodong(College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China;Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special Starch, Fuzhou, Fujian 350002, China;China-Ireland International Cooperation Center for Food Material Science and Structure Design, Fuzhou, Fujian 350002, China)

机构地区：[1]福建农林大学食品科学学院,福建福州350002 [2]福建省特种淀粉品质科学与加工技术重点实验室,福建福州350002 [3]中国-爱尔兰国际合作食品物质学与结构设计研究中心,福建福州350002

出　　处：《福建农林大学学报（自然科学版）》2019年第2期259-265,共7页Journal of Fujian Agriculture and Forestry University:Natural Science Edition

基　　金：福建省高等学校科技创新团队支持计划项目(闽教科[2012]033号);福建农林大学国际科技合作与交流项目(KXGH17001);福建农林大学高水平大学建设项目(612014042);福建农林大学科技创新团队支持计划项目(cxtd12009)

摘　　要：研究不同干燥温度、装载密度和物料厚度对南瓜片干燥速率的影响,以探明南瓜片在太阳能—热泵联合干燥过程中的水分变化规律,并用7种干燥模型对干燥特性试验数据进行非线性回归拟合求解,确定模型系数并获得最优模型.结果表明:干燥温度、装载密度和物料厚度对南瓜片的干燥速率有显著影响(P<0.05),在各干燥条件下南瓜片均呈先加速后减速的干燥过程.通过对干燥动力学模型的拟合后发现,试验数据在Midilli and Kucuk模型中的回归系数(R^2)最大,残差平方和(SSE)和均方根误差(RMSE)较低.表明Midilli and Kucuk模型能较准确地表达和预测南瓜片太阳能—热泵联合干燥过程中的水分变化规律.In order to ascertain moisture change pattern for pumpkin(Cucurbita moschata Duch)slice using solar-assisted heat pump, the effects of drying temperature, loading density and material thickness on drying rate were studied. Seven candidate mathematical models were proposed to fit the drying pattern, with coefficients of models being determined by non-linear regression analysis.The results showed that drying temperature, loading density and material thickness had positive effects on drying rate and time(P<0.05).Overall, drying rate was accelerated and subsequently decelerated under all drying conditions.Among all mathematical models tested, Midilli and Kucuk model turned out to be the optimum dynamic model describing moisture change when drying pumpkin slice using solar-assisted heat pump with relatively high correction coefficient R^2, low square sum of error(SSE)and root mean square error(RMSE).

关 键 词：南瓜片 太阳能-热泵联合干燥 干燥特性 干燥动力学模型 

分 类 号：TS205.1[轻工技术与工程—食品科学]