热二极管在储能式太阳热水器中的应用研究  

A Study of Heat Transfer Characteristics of Thermal Diode in Solar Water Heater with Thermal Storage

作　　者：钟浩元[1] 张仁元[1] 史保新[1] 李石栋[1] 刘良德[1] 

机构地区：[1]广东工业大学材料与能源学院,广东广州510090

出　　处：《广东工业大学学报》2010年第1期42-46,共5页Journal of Guangdong University of Technology

基　　金：广东省科技计划项目(2007B010800032)

摘　　要：介绍了热二极管概念及其工作原理,分析了太阳能相变储能材料所应具备的热物理性质,对热二极管传热性能以及储能材料的相变规律开展了实验研究.实验结果表明:热二极管具有良好的启动和等温传热性能;当加热段内工质充液率约为85%时,热二极管传热效率和冷凝段换热系数均达到最佳值;储能材料内部在相变过程中存在不均匀性,且与冷凝段管壁间的换热系数较小.It introduces the concepts and working principles of thermal diode, as well as thermophysical properties which solar phase-change materials should have. Some experiments are also performed to study heat transfer performance of thermal diode and phase-change rules of energy storage materials. Experimental results show that thermal diode has a good start-up performance and isothermal heat transfer characteristics. When the working fluid filling rate in the heating section is about 85 %, heat transfer efficiency of thermal diode and coefficient of heat transfer in the condenser section can be achieved to the best value. Meanwhile, there exists non-uniform phase transition in the inner part of material, and the heat transfer coefficient between the condenser section and the material is small.

关 键 词：热二极管 储能材料 传热系数 

分 类 号：TK513.5[动力工程及工程热物理—热能工程]