Flow and heat transfer characteristics of ice slurries in a helically-coiled pipe
Flow and heat transfer characteristics of ice slurries in a helically-coiled pipe
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DOI：
10.1016/j.ijrefrig.2013.02.010
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发表时间：
2013-06
期刊：
影响因子：
--
通讯作者：
N. Haruki;A. Horibe
中科院分区：
文献类型：
--
作者：
N. Haruki;A. Horibe
近年来，冰浆由于具有较高的能量效率和换热能力而备受关注。本文研究了冰浆在动态冰蓄冷系统螺旋盘管中的流动和换热特性与冰块填充系数、平均流速、输入热流密度和盘管半径的关系。研究发现，由于二次流的存在，浮力和离心力的相互作用会影响冰浆在螺旋管内的流动阻力。相反，冰浆在螺旋管内的换热系数受冰粒潜热的影响。根据几个无量纲参数，提出了用于预测冰浆流动阻力和换热系数的有用关联式。
Recently, ice slurry has attracted much attention due to its high energy efficiency and heat exchange ability. In this study, the flow and heat transfer characteristics of ice slurry in helically-coiled pipes of a dynamic ice-thermal storage system were investigated as a function of the ice packing factor, mean flow velocity, input heat flux, and coil radius. It was found that the flow resistance of ice slurry in helically-coiled pipes was influenced by the interaction between the buoyant force and the centrifugal force, due to secondary flow. In contrast, the heat transfer coefficient of ice slurry in helically-coiled pipes was influenced by the latent heat of the ice particles. Useful correlations for predicting the flow resistance and heat transfer coefficient of ice slurry were proposed in terms of several non-dimensional parameters.