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2. Problems with conventional heat transfer design
There are multiple problems associated with the design of conventional heat transfer equipment that will be very familiar to engineers and maintenance teams working in a wide variety of industries. Dirt and corrosion Industrial exhaust gases can be dirty and corrosive, and can also contain particulates that are abrasive or will build up and coat the surfaces of an exhaust gas system. In this type of application, traditional heat transfer designs can easily become clogged or damaged due to the high thermal stresses generated. Thermal stress and thin metal surfaces Thermal stress and cold spots which cause gas condensation and, in turn, corrosion are very common problems for conventional heat transfer designs. They are often equipped with thin metal surfaces that, whilst aiding heat transfer, leave them vulnerable to corrosion and fouling. Preventing dew point corrosion Conventional heat transfer designs, which often use long lengths of tube, are vulnerable to cold spots and variations in temperature along their length. This can cause thermal and dew point corrosion.
Single tube failure Single tube failure is a particular problem for conventional heat transfer designs, which often results in catastrophic failure and the complete write-off of the equipment. When a single tube IDLOVWKHRYHUDOOHI¿FLHQF\RIWKHKHDWH[FKDQJHULVVLJQL¿FDQWO\ impacted, and often the only resort is to completely replace the entire unit. Maintenance and reliability Conventional heat transfer design is also susceptible to fouling from industrial processes, such as milk spray drying, waste incinerators and tablet spray drying in the pharmaceuticals VHFWRU2IWHQWKHGHVLJQLVGLI¿FXOWWRFOHDQDQGUHTXLUHVGH LQVWDOODWLRQZKLFKLPSDFWVSURGXFWLYLW\DQGHI¿FLHQF\
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