日本冷凍空調学会論文集
Online ISSN : 2185-789X
Print ISSN : 1344-4905
ISSN-L : 1344-4905
論文
冷凍機油に対する冷媒の過渡溶解特性
第1報:円筒槽内における静的な溶解
福田 充宏柳沢 正清水 孝丹野 英樹小木 康博
著者情報
ジャーナル オープンアクセス

1997 年 14 巻 1 号 p. 75-85

詳細
抄録

Mixing of refrigerant with refrigeration oil has great influence on viscosity and foaming of the oil in refrigerant compressors. This paper dealt with transient characteristics of mixing process of refrigerant into refrigeration oil. The mixing phenomena were investigated by using an experimental apparatus which modeled process of the oil-refrigerant mixing in a casing of refrigerant compressors. Mass of refrigerant dissolved into the oil stored in a cylindrical vessel was recorded continuously under different conditions of pressure, temperature, amount of the oil, diameter of the vessel and combination of the refrigerant and the oil. On the other hand, the mixing phenomena were analyzed theoretically by two mathematical models, one is a one-dimensional diffusion model and the other is a mass transfer model. Based on the comparison of theoretical and experimental results, values of apparent diffusion coefficient and mean mass transfer coefficient were decided. The mixing process can be easily predicted by these models, but an applicable range of mass transfer model is wider than that of diffusion model. The mixing characteristics were correlated by a non-dimensional equation composed of Schmidt number, Grashof number and aspect ratio in the diffusion model and by another non-dimensional equation composed of Sherwood number, Schmidt number and Grashof number in the mass transfer model.

著者関連情報
© 1997 公益社団法人 日本冷凍空調学会
前の記事 次の記事
feedback
Top