Patent ID: 7018558
Filing Date: 2006-03-28
Classification: C09K,C10M,C10N

Abstract:
1. A process of improving by at least 2.5% the coefficient of performance of a refrigerant system utilizing a working fluid and comprising a compressor, a condenser, an expansion device and an evaporator, the process comprising employing in the system a working fluid consisting essentially of esters of alcohols consisting essentially of pentaerythritol and di-pentaerythritol and carboxylic acids consisting essentially of a mixture of nC 5 , nC 6 , nC 7 and nC 8 acids and including at least one additive selected from the group consisting of oxidation resistance and thermal stability improvers, corrosion inhibitors, metal deactivators, lubricity additives, viscosity index improvers, pour and/or floc point depressants, detergents, dispersants, foam promoting agents, anti-foaming agents, anti-wear and extreme pressure resistance agents and acid scavengers, and that is miscible with the heat transfer fluid over the entire operating conditions of the system compared with a mineral oil lubricant that is not miscible over the operating conditions of the system.