ヒートポンプ用熱交換器の着霜融解に関する研究 : 続報, ワッフル形熱交換器を用いたときの着霜量の影響

概要

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This experimental work is carried out to obtain basic information on the melting of frost on a heat exchanger actually used as a heat pump and air conditioner. The dimensions of the heat exchanger are 400L × 44W × 254H mm. First, frosting behavior is investigated to determine the relationship between frost volume and frosting time. It is found that frosting rate is very large until one hour after the start of frosting: after one hour, the frosting rate gradually decreases. Next, defrosting experiments are carried out in the range of 30-400 g of frost. Melting thermal efficiency defined with critical melting time t_c is not affected by frost volume: on the other hand, melting thermal efficiency defined with flow-out time of melting-water t_e is much affected by frost volume. Finally an example of the defrosting experiment is presented, carried out using a compressor working with an actual refrigeration cycle.
一般社団法人日本機械学会の論文
1990-11-25