Calorifier - An apparatus used for the transfer of heat to water in a vessel by indirect means, the source of heat being contained within a pipe or coil immersed in the water.
A heat exchanger is a device built for efficient heat transfer from one fluid to another, whether the fluids are separated by a solid wall so that they never mix, or the fluids are directly contacted. They are widely used in petroleum refineries, chemical plants, petrochemical plants, natural gas processing, refrigeration, power plants, air conditioning and space heating.
-Typical existing building calorifier room - In the existing system, the calorifiers transfer heat from a circuit containing high temperature and pressure water generated by the boilers to a separate circuit that is run at a temperature and pressure that it is safe to distibute within the building concerned.
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