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Comment PDF Heat Transfer

Maintaining Heat-Transfer-Fluid Quality

By Conrad Gamble, Eastman |

Learning what can degrade heat-transfer-fluid quality can help minimize potentially negative effects Organic heat transfer fluids (HTFs) are robust workhorses that are quite stable both thermally and chemically. However, they can yield to attacks from powerful or sometimes even subtle forces, falling short of the hopes and expectations of system owners. The best defense against these attacks is to know the strengths of a fluid and how to strategically intervene. This guide will help educate system owners on how to successfully resist these attacks and minimize impacts of those which may be already underway.   Basic guidelines Maintaining the fluid quality will minimize its change from like-new condition. In a new system, the first goal is to have the system free of potentially problem-causing debris and residue prior to filling the system with the new heat transfer fluid. It is common for piping and equipment to have a thin rust-inhibitor coating on the metal surfaces that guards them from rusting prior to commissioning. Practical experience has found that small amounts of these coatings have a relatively insignificant impact on the fluid chemistry and stability. As a result, there should be no need for chemical or detergent…
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