Experimental Research on Dissolution Characteristics of R474A and R479A in Lubrication Oils
The novel refrigerants R474A and R479A demonstrate superior performance in environmental friendliness, safety, thermodynamic properties. However, research on their solubility characteristics with refrigeration oils remains unexplored. This study investigates the miscibility and solubility of R474A a...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Journal of Refrigeration Magazines Agency Co., Ltd.
2025-01-01
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| Series: | Zhileng xuebao |
| Subjects: | |
| Online Access: | http://www.zhilengxuebao.com/thesisDetails?columnId=109224178&Fpath=home&index=0 |
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| Summary: | The novel refrigerants R474A and R479A demonstrate superior performance in environmental friendliness, safety, thermodynamic properties. However, research on their solubility characteristics with refrigeration oils remains unexplored. This study investigates the miscibility and solubility of R474A and R479A with lubrication oils RB68 and RB100EV. The critical miscibility temperatures of R474A and R479A with RB68 and RB100EV were tested within a temperature range of -20°C to 20°C. The findings reveal that within the experimental temperature range, R474A is miscible with RB68 and RB100EV solutions at different oil contents, and the critical miscibility temperature is lower than -20℃. R479A maintains a homogeneous transparent state with both refrigeration oils, with critical miscibility temperatures below -20°C. Based on the isochoric saturation method, the solubility of R474A and R479A in RB68 and RB100EV was tested within a temperature range of -20°C to 60°C. The experimental results demonstrate that the solubility of both novel refrigerants in RB68 and RB100EV increases with rising pressure and decreases with rising temperature. Within a certain temperature range, the enhancing effect of pressure on solubility significantly increases as pressure rises. |
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| ISSN: | 0253-4339 |