Field Demonstration of Performance Benefits of Hydrotreated
Field Demonstration of Performance Benefits of Hydrotreated Paraffinic (Group II) Refrigeration Oils in Ammonia Systems (2001)-Several recent contributions to the refrigeration literature describe the advantages of refrigeration oils made from hydrotreated paraffinic mineral oils, also known as Group II oils, used in ammonia refrigeration systems. These papers have presented a great deal of information on the physical and chemical properties of hydrotreated paraffinic mineral oils that should provide beneficial properties for ammonia systems when compared to the use of a conventional lubricant manufactured from naphthenic mineral oils. However, there has not been a wealth of documentation that these physical and chemical properties of hydrotreated paraffinic oils actually produce the promised advantages in ammonia refrigeration systems. This paper explores the properties of hydrotreated paraffinic oils, comparing them to the requirements for a lubricant in an ammonia refrigeration system. Field case studies are presented that show how these physical and chemical properties translate into operational benefits in the ammonia compressor and the refrigeration system. These case studies demonstrate the value these lubricants provide in reducing maintenance costs, extending equipment life and solving problems.
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