Heat Exchanger Description
Heat exchangers are used in most steam systems. Steam-to-water heat exchangers
(sometimes called converters or storage tanks with steam heating elements) are
used to heat domestic hot water and to supply the terminal equipment in hot
water heating systems. These heat exchangers are the plate type or the shell-and-tube
type, where the steam is admitted to the shell and the water is heated as it
circulates through the tubes. Condensate coolers (water-to-water) are sometimes
used to subcool the condensate while reclaiming the heat energy.
Water-to-steam heat exchangers (steam generators) are used in high-temperature
water (HTW) systems to provide process steam. Such heat exchangers generally
consist of a U-tube bundle, through which the HTW circulates, installed in a
tank or pressure vessel.
All heat exchangers should be constructed and labeled according to the applicable
ASME Boiler and Pressure Vessel Code.
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