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Comment Heat Transfer

Heat transfer system cleaning

By Chemical Engineering |

A well designed and operated heat-transfer-fluid system is a key feature of a safe, reliable and cost-effective heating design. However, problems can arise if the heat-transfer fluid becomes heavily degraded or the system is allowed to accumulate solids and other process contaminants. These problems include the following: • Reduced heat-transfer rates • Diminished fuel efficiency • Flow blockage in small-dia. or low-velocity areas • Extended startup times at low temperatures • Fouling of heat-transfer surfaces • Overheating, damage or failure of heater tubes Avoiding heat-transfer fluid degradation and contamination often requires the use of the following filtration, flushing and cleaning techniques. Filtration In many cases, filtration can effectively remove solids that, if left unchecked, may result in the need to drain and flush a system. In general, glass-fiber-wound filter cartridges work well for in-system filtration of organic-liquid heat-transfer fluids. These filters are generally available from numerous manufacturers, are usable at temperatures up to 400°C, typically have adequate solids-holding capacity and are usually economical and disposable. The filter housing should also be specified…
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