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Processing & Handling :: Thermal & Energy Management :: Heat Transfer Media

March 1, 2005

Get the Most From High-temperature Heat-transfer-fluid Systems

Fluid selection, system design and maintenance are the keys to achieving the best performance

Krishnan Sahasranaman, Uhde India Ltd.

Although water and steam are the ideal media for heat transfer, there are often situations when other heat-transfer fluids are called upon to perform this function in the chemical process industries (CPI). Thus there are, at the very high-temperature end, various types of heat-transfer fluids, such as molten salts and even molten metals. At the lower end of the temperature scale we have various proprietary and non-proprietary brines, usually glycols of one kind or the other. Between these two temperature extremes, a variety of heat-transfer fluids are also available. For this discussion, the focus will be on high-temperature heat-transfer fluids; those having useful bulk-fluid-operating temperatures of approximately 70–400°C....

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