Natural Convection Heat Transfer from A Heated Horizontal Cylinder with Microencapsulated Phase-change-material Slurries.
Natural Convection Heat Transfer from A Heated Horizontal Cylinder with Microencapsulated Phase-change-material Slurries.
复制标题
使用微胶囊相变材料浆料从加热卧式圆筒进行自然对流换热。
DOI：
10.1299/kikaib.64.3013
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
A. Nagashima
中科院分区：
文献类型：
--
作者：
S. Kubo;N. Akino;A. Tanaka;A. Nagashima
本文研究了微胶囊相变材料（MCPCM）水浆冷却加热圆柱体的自然对流换热。将碳原子数为18、熔点为27.9°C的正构烷烃用三聚氰胺树脂微胶囊化成平均粒径为9.5 μm、比重与水相同的颗粒。将MCPCM和水的浆料放入具有加热的水平圆筒的矩形外壳中。计算了圆柱体的传热系数。改变相变材料的浓度和气缸表面与工质之间的温差。加入MCPCM后，在有相变的情况下，与纯水相比，传热得到了显著的增强，而在无相变的情况下，传热略有降低。
The present study investigates natural convection heat transfer from a heated cylinder cooled by a water slurry of Microencapsulated Phase Change Material (MCPCM). A normal paraffin hydrocarbon with carbon number of 18 and melting point of 27.9°C, is microencapsulated by Melamine resin into particles of which average diameter is 9.5 μm and specific weight is same as water. The slurry of the MCPCM and water is put into a rectangular enclosure with a heated horizontal cylinder. The heat transfer coefficients of the cylinder were evaluated. Changing the concentrations of PCM and temperature difference between cylinder surface and working fluid. Addition of MCPCM into water, the heat transfer is enhanced significantly comparison with pure water in cases with phase change and is reduced slightly in cases without phase change.