期刊
APPLIED ENERGY
卷 86, 期 12, 页码 2661-2670出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2009.04.025
关键词
Microencapsulated phase change material; Slurry; Laminar flow; Phase change; Heat transfer
资金
- National Natural Science Foundation of China [50436020]
Due to its large apparent specific heat during the phase change period, microencapsulated phase change material slurry (MPCMS) has been suggested as a medium for heat transfer. In this paper, the convective heat transfer characteristics of MPCMS flowing in a circular tube were experimentally and numerically investigated. The enhanced convective heat transfer mechanism of MPCMS, especially in the thermal fully developed range, was analyzed by using the enthalpy model. Three kinds of fluid-pure water, micro-particle slurry and MPCMS were numerically investigated. The results show that in the phase change heat transfer region the Ste number and the Mr number are the most important parameters influencing the Nusselt number fluctuation profile and the dimensionless wall temperature. Re-b, d(p) and c also influence the Nusselt number profile and the dimensionless wall temperature, but they are independent of phase change process. (C) 2009 Elsevier Ltd. All rights reserved.
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