Review article: A critical review of the influence of lubricants on the heat transfer and pressure drop of refrigerants, part 1: Lubricant influence on pool and flow boiling

The influence of refrigeration lubricants on pool and flow boiling of refrigerant-oil mixtures is a complex subject, and a consistent relationship cannot be identified. Instead, the influence varies greatly depending on oil concentration, operating parameters, and application. This paper intends to present a comprehensive summary of the various studies that have been conducted in this area and tries to identify some general relationships. In addition, the research methods and correlations presented on each of these subjects are summarized. Finally, technical recommendations regarding the lubricant influences on these aspects are provided in this paper.