The heat transfer

Most of the heat transfer oils are paraffinic oils that have a high viscosity index. Due to the conductivity and good heat capacity of these oils, they can be used in systems that have a high heat transfer rate. Nitrogen oils have some useful properties at low temperatures, but the thermal stability of this oil It is not as good as paraffinic oils, and the viscosity – the temperature of naphtenic oils is worse than paraffinic oils. Stability against oxidation of heat transfer oils is effective over their operating life. Because of the use of these oils in a closed system and continuous contact with air, the oxidation factors in these oils are not very severe. Despite the very good stability of the heat transfer oil against aging, excessive temperature stresses can lead to aging and oil degradation. The presence of iron rust or copper particles in pipes also increases the process of degradation and aging.

Introduction to Dayan heat transfer

Introduction to Diane heat transfer