縦フィン付潜熱蓄熱器の凝固過程における相似曲線 : 第1報,相似則の成立に及ぽすステファン数の影響

概要

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Generally, similarity curves for different Biot numbers are known to become more and more distinguishable with the increase in Stefan number ; in other words, the formation of the similarity rule is affected by the Stefan number. In this research, in addition, it has been clarified that in a straight-finned storage unit, the effect of the Stefan number varies according to the number of the straight fins. The effect of the Stefan number and the cause of its variation are studied in this report. Sensible heat released during the solidification process was calculated individually in PCM, the heat transfer tube and the fins. The relationship between sensible heat and frozen fraction in the Biot numbers of 0. 1 and 1000 were also presented. Furthermore, the latent heat contribution to the heat flow inside the unit was examined for the various Stefan numbers compared with the sensible heat contribution. The latent and sensible heat contributions were found to be almost inversely related. This inverse relationship reduces the effect of the Stefan number on the similarity rule.
1993-01-25