Flow frictional characteristics of microencapsulated phase change material suspensions flowing through rectangular minichannels

查看全文 作　　者：Frank [1]Dammel;Peter [1]Stephan

机构地区：[1]Chair of Technical Thermodynamics, Darmstadt University of Technology, Germany

出　　处：《Science China(Technological Sciences)》索引2006年第49卷第4期,共12页

基　　金：partly supported by Deutscher Akademischer Austausch Dienst(German DAAD scholarship),Chinese Scholarship Council;the National Natural Science Foundation of China(Grant Nos.50436020 and 50176004). 摘　　要：An experimental investigation was conducted on the laminar flow frictional characteristics of suspensions with microencapsulated phase change material (MEPCM) in water flowing through rectangular copper minichannels. The MEPCM was provided at an average particle size of 4.97 μm, and was mixed with distilled water to form suspen- sions with various mass concentrations ranging from 0 to 20%. The experiment was per- formed to explore the effect of MEPCM mass concentration on friction factor and pressure drop in the minichannels. The Reynolds number ranged from 200 to 2000 to provide laminar and transitional flows. It was found that the experimental data for the suspensions with 0 and 5% concentration agree well with the existing theoretical data for an incom- pressible, fully developed, laminar Newtonian flow. For the suspensions with mass con- centrations higher than 10%, there is an obvious increase in friction factor and pressure drop in comparison with laminar Newtonian flow. 关键词：microencapsulated phase change material suspension, FRICTION factor, RECTANGULAR minichannel.

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Flow frictional characteristics of microencapsulated phase change material suspensions flowing through rectangular minichannels

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