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International Heat Transfer Conference 12

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

Study on direct contact melting of porous material

Hiroyuki Kumano
Department of Mechanical Sciences and Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8552 JAPAN

Akio Saito
Department of Mechanical Sciences and Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8552 JAPAN

Seiji Okawa
Department of Mechanical Sciences and Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8552, Japan

DOI: 10.1615/IHTC12.3690
6 pages

Sinopsis

The direct contact melting of a porous material is investigated experimentally and analytically. The phase change material is made of fine ice particles of a nearly uniform diameter, which is changed as a parameter. In the analysis, two models are proposed. One is calculated as the direct contact melting of a monolithic sample and another is treated as an assembly of the direct contact melting of the individual particles. As a result, it was found that the heat flux increased with the diameter, due to increase of permeability in a case of small diameter. But, in a case of large diameter, the heat flux decreased as the particle diameter increased because the direct contact melting occurred independently for the individual particles. Moreover, the experimental and analytical results agree well witheachoth er in the applicable range of each model.

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