Visualization of the solid–liquid equilibria for non-flammable mixed refrigerants
作者： Cheonkyu Lee , Junghyun Yoo , Jisung Lee , Sangkwon Jeong , None
DOI: 10.1016/J.CRYOGENICS.2016.01.003
关键词:
摘要: Abstract Non-flammable mixed refrigerant (NF-MR) Joule Thomson (J–T) refrigerators have desirable characteristics and wide cooling temperature range compared to those of pure J–T refrigerators. However, the operating challenge due freezing is a critical issue realize this type refrigerator. In paper, solid–liquid phase equilibria (i.e. point) NF-MR which composed Argon (Ar), R14 (CF4), R218 (C3F8), has been experimentally investigated by visualized apparatus. The accuracy apparatus verified with refrigerants selected binary refrigerants. Freezing points ternary NF-MRs measured molar compositions from 0.1 0.8 for each component. Each test result simultaneously acquired camcorder visual inspection measurement during warming process. Experimental results reveal that specific MR, composition higher than 0.4, can achieve remarkably low even below 77 K. These unusual point depression MR be useful information designing cryogenic refrigerator reach temperatures less
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