Diluting thermal fluid
How to dilute heat transfer oil
When thermal fluid degrades, contaminants will build up in the system and reduce the heat transfer efficiency of the fluid. Diluting thermal fluid allows manufacturers to remove these contaminants, improve heat transfer efficiency and extend the lifespan of their fluid.
While thermal fluids are designed to operate at and maintain high temperatures for long periods of time, they will begin to degrade over their lifespan, particularly if they are left unattended.
Thermal oil will break down by both oxidation and thermal cracking. All systems are designed to run using Ph neutral fluid to avoid excessive corrosion. Oxidation occurs when heated fluid above 60°C is exposed to air with no nitrogen blanket and once acid (TAN) levels start to increase. When the fluid oxidises, heavy ends, or carbon, instantly start to form, which will adversely affect pipework, the heater coil, the expansion tank and general system efficiency and safety.
Degradation can be a gradual process, so may go unnoticed until it negatively impacts production. For example, if food products cook inconsistently or chemicals do not blend, it is likely that the fluid has degraded. When this occurs, manufacturers should cease production and take action to maintain the fluid.
Heat transfer fluid maintenance
Regular sampling enables manufacturers to understand fluid condition and anticipate its degradation, planning in maintenance before issues negatively impact production. Engineers can implement a preventative maintenance programme, such as Thermocare®, for sampling and maintenance support.
Manufacturers can also introduce remote condition monitoring systems to further improve maintenance. Thermocare® 24/7 Live Condition Monitoring is a cloud-based remote monitoring system that uses live real-time analytics to assess the condition of thermal oil and diagnose potential issues. As soon as the platform detects an anomaly, it warns maintenance personnel by sending an alert to their smart devices.
Where can I get more support with diluting thermal fluid?
For more advice on diluting thermal fluid, other methods that can extend the lifespan of heat transfer oil or other heat transfer system management services, contact Global Heat Transfer