融雪を伴う熱交換器の特性 : 第4報, 複数パス熱交換器の場合

概要

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A multiple pass heat exchanger composed of pipes and plate fins has a typical structure of the heat exchangers used for melting snow. In this study, we discussed the characteristic of the multiple pass heat exchanger having two types, a regular interval type and an irregular one, focusing on pipe pitch of the multiple pass heat exchanger. The perfect melting condition and the melting efficiency were related to dimensionless parameters for the heat exchanger and its operating conditions. The calculated results for the perfect melting condition and the melting efficiency agreed with the results obtained from the field tests on melting of falling snow. Applying the irregular interval leads to extend the critical condition of the perfect melting when the flow rate of brine is low or the area for melting of falling snow is wide. Also, the melting efficiency of the irregular interval becomes higher than that of the regular interval. The optimum pipe pitch was obtained, connecting with the maximum values of the critical condition of the perfect melting.
社団法人日本機械学会の論文
2000-12-25