| 半封闭热泵干燥系统的热力学分析与试验 |
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| 引用本文： | 向 飞,王 立,岳献芳.半封闭热泵干燥系统的热力学分析与试验[J].农业工程学报,2009,25(2):240-245. |
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| 作者姓名： | 向 飞 王 立 岳献芳 |
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| 作者单位： | 北京科技大学机械工程学院,北京,100083 |
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| 基金项目： | 科技部“农业科技成果转化资金”重大项目（04EFN217100386） |
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| 摘 要： | 为实现谷物干燥装置的车载移动功能，必须通过提高设备性能来实现装置小型化，为此，基于前期谷物干燥试验和理论研究，设计出一种半封闭热泵流化床谷物干燥系统。该系统采用蒸汽压缩式热泵(热泵工质为R134a)提供热量，以卧式多室流化床为干燥器，让热泵蒸发器回收流化床前段排气中水蒸气潜热，鼓入环境状态的新风以回收干燥后物料的热量。针对该系统建立了集流化床内的流动、颗粒传热传质、床层干燥过程与热泵系统耦合为一体的综合数学模型。计算表明：干燥室入口空气温度在60～90℃之间变化时，干燥系统的除湿能耗比（SMER）存在一个最大值。开发出了干燥样机。试验表明：干燥过程中，干燥室入口空气温度在64.4～71.7℃间波动，新风比约为30%，平均热泵性能系数 （COP）为3.34，SMER可达1.935 kg/(kW?h)。模型计算与试验结果吻合良好，采用该装置进行谷物干燥节能效果明显。
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| 关 键 词： | 半封闭热泵 谷物干燥 数学模型 热力学分析 试验研究 |
| 收稿时间： | 8/1/2008 12:00:00 AM |
| 修稿时间： | 1/9/2009 12:00:00 AM |
Thermodynamic analysis and experimental study of a semi-closed heat pump drying system |
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| Xiang Fei,Wang Li and Yue Xianfang.Thermodynamic analysis and experimental study of a semi-closed heat pump drying system[J].Transactions of the Chinese Society of Agricultural Engineering,2009,25(2):240-245. |
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| Authors: | Xiang Fei Wang Li and Yue Xianfang |
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| Institution: | School of Mechanical Engineering;University of Science and Technology Beijing;Beijing 100083;China |
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| Abstract: | A type of semi-closed heat pump assisted fluidized bed drying system had been designed based on former grain drying experiments and theoretical researches so as to achieve the vehicle-mounted movable function.A horizontal multi-room fluidized bed was chosen as the drying chamber,and a vapor compression heat pump(R134a as refrigerant) supplied heat for the system.Latent heat of steam discharged from the fluidized bed's forepart was recovered by the heat pump evaporator,and ambient air was blown into the rear... |
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| Keywords: | heat pump systems grain drying mathematical models thermodynamic properties experiments |
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