导　　师： 冯毅

学科专业： 080706

授予学位： 硕士

作　　者： ;

机构地区： 华南理工大学

摘　　要： 干燥行业是耗能较大的产业，在发达国家，大约10/%～20/%的燃料应用于干燥工艺。随着世界能源的不断短缺和环境的日益恶化，热泵干燥技术因为具有高效节能、成本较低、不污染环境，因而广泛利用于干燥领域。此外太阳能易获取，无污染的特点能与热泵系统很好的耦合，热泵系统加上太阳能加热技术作为辅助的联合干燥系统，可以极大地降低干燥过程的电能消耗。因此，对太阳能热耦合热泵干燥系统的运行进行优化设计具有深远意义。 本论文运用CFD软件对热泵干燥室形状以及导风板的布置进行设计，同时对不同结构干燥室内空气温度场和速度场进行数值模拟并比较分析。结果表明，当导风板向左展开并与水平面成10°夹角时，干燥室内的温度场和速度场的分布最合理，同时物料受热也最均匀。 本论文通过对干燥过程中传热传质模型的研究作为基础，以大型的香菇干燥生产系统为原型，研制一套集热面积为16.8m2太阳能集热器和额定功率为4.5kW空气源热泵的联合干燥系统，并对太阳能和热泵设备进行性能测试，同时采用独立干燥、联合干燥、间歇干燥等五种不同的干燥模式进行香菇干燥实验，对各种干燥工艺下香菇产品的色泽、香味和总体干燥时间、系统干燥能耗等因素进行分析评价，并得出香菇的最佳干燥工艺。 实验表明，在各种实验工况下，太阳能空气集热器平均热效率接近56/%，热泵系统的平均COP能达到5.0。太阳能集热器单独干燥工艺比传统的电加热干燥工艺节能84/%以上，干燥时间缩短约22/%；间歇干燥比传统电加热干燥节能66/%以上，干燥时间缩短约37/%，同时还能够保产品香菇的干燥品质。 Drying technology is an industry that consumes a lot of energy. In the developedcountries, about10/%～20/%of the fuel was used in drying process.With the shortage ofresources and the deterioration of the environment, Heat Pump Drying technology was widelyused today because of its high-efficiency of the energy-saving,non-pollution of theenvironment，and the low cost. In addition, because the solar energy is pollution-free and canbe gained easily, so the coupling drying system which couples Heat Pump Drying technologywith the solar energy heating technology can largely reduce electricity energy consumption.So，it has profound significance to optimize the operation of solar energy heating couplingwith Heat Pump Drying system. The paper uses CFD software to design the shape of the Heat Pump drying chamber andthe position of the guide wind panel. The numerical calculating was done in order to imitateand analyze the temperature field and the velocity field of the air. The result shows that whenthe guide wind panels left expand and incline at an angle of10o to the horizontal，thedistribution of the temperature field and the velocity field in drying chamber was mostreasonable，as the same time，the material can be heated evenly. The study of the heat conduction and mass transfer model as the basis, the large-scalemushroom drying production system as the prototype, this paper that manufactures a couplingdrying system of heat collecting area of16.8m2solar energy heat collector and an air sourceheat pump with rated power of22kW, tests the performance of the solar energy-heat pumpequipment, experiments on the mushroom drying by five different drying patterns：independent drying, combined drying, intermittent drying and so on. And then analyzes andevaluates the factors such as color, fragrance, overall drying time, and energy consumption indifferent drying patterns, and finally gets the most optimal mushroom drying technology. The experiment shows that under the different experimental conditions, the thermalefficiency of solar energy heat collector can be closed to56/%averagely, and the average COPof the Heat Pump system can reach5.0. The solar energy independent drying technology cansave more than84/%of the energy and shorten about22/%of the overall drying time；theintermittent drying technology can save more than66/%of the energy and shorten about27/%of the overall drying time, besides, the mushroom quality can be maintained well.

关 键 词： 太阳能空气集热器 热泵 干燥 节能

分 类 号： [TK173]

领　　域： [动力工程及工程热物理]