R404a and lubricants.

Le R404A et les lubrifiants.

Type of article: Article

Summary

In all refrigerating machines, the compressor is the heart of the system and keeps the refrigerant circulating. It is the only moving part, and thus requires lubrication. However, because of compressor technology, large quantities of oil get into the circuit, where the presence of the lubricant causes various problems which the author details. The crucial factor in ensuring proper functioning of the installation is the lubricant-refrigerant mixture, which is found in varying proportions, depending on where it is in the circuit. Nevertheless, there are some tests for just the lubricant. The following properties are required by the lubricant-refrigerant pair: chemical and thermal inertia (in the entire circuit); miscibility under hot and cold conditions (i.e., the condenser and the evaporator, respectively), and good lubrication (for the compressor).

Details

Original title: Le R404A et les lubrifiants.
Record ID : 1995-0051
Languages: French
Source: Rev. gén. Froid - vol. 84 - n. 941
Publication date: 1994/03
Document available for consultation in the library of the IIR headquarters only.

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Indexing

Themes: CFCs;
Lubricants;
Blends
Keywords: CFC; Lubrication; R404A; Substitute; Mineral oil; Ester; Refrigerant