会议专题

HEAT TRANSFER CHARATERISITCS OF LAMINAR MIROENCAPSULATED PHASE CHANGE MATERIAL SLURRIES FLOW IN A CIRCULAR PIPE

Microencapsulated Phase Change Material Slurries (MPCMS) is a kind of novel heat transfer fluid. In this paper, the enthalpy model was developed for numerical investigation on the convective heat transfer characteristics of MPCMS flowing in a circular tube. The numerical investigation was focused on the thermal fully developed range to avoid the influence of the thermal development. Three kinds of fluid, such as pure water, microparticle slurry and MPCMS, were numerically investigated to separate the influences of the microparticle and phase change. The influences of each factor such as particle fraction, the Ste number, the Mr number and so on, on the local Nusselt number and dimensionless wall temperature were analyzed numerically. The results show that the Ste number and the Mr number are the most important parameters influencing the Nusselt number fluctuation profile and the dimensionless wall temperature increase of phase change slurries when the phase change occurs. c, dp and Reb also influence the Nusselt number profile and the dimensionless wall temperature increase of phase change slurries, and they are independent of phase change.

Microencapsulated phase change material slurry Laminar Dimensionless wall temperature Constant heat flux

Ruolang Zeng Xin Wang Hongfa Di Binjiao Chen Yinping Zhang

Department of Building Science, Tsinghua University, Beijing 100084, China

国际会议

第五届暖通空调国际研讨会(Proceedings of the 5th International Symposium on Heating,Ventilating and Air Conditioning)

北京

英文

2007-09-07(万方平台首次上网日期,不代表论文的发表时间)