冷媒R134aに対する二相流ノズルの性能

概要

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The dissipated effective kinetic energy in the refrigeration cycle can be recovered using the two-phase ejector. Performance of the two-phase nozzle plays an important role in developing the two-phase ejector for the refrigeration cycle. It is also important to know the efficiency of the two-phase nozzles for refrigerant because the physical properties of refrigerant are different from that of hot water which has been studied. The purpose of the present study is to elucidate the nozzle performance of two-phase flow of refrigerant R134a which is composed of no chloric radical. The experimental results shows that the efficiency of the long nozzle of about 110 mm is high up to 90% which is higher than that using hot water. The efficiency of the nozzle which has the same outlet diameter as an ideal nozzle is higher than others, because the flow flush out of it is at the most suitable expansion condition.
社団法人日本機械学会の論文
1998-10-25