Another
application of water pumps is in the heating industry. Boiler water circulating
pumps are used to take the water that has been heated in a boiler and
distribute that heated water through a network of pipes and heat exchangers
(typically radiators or convectors). The thermal energy of the heated water is
then passed by conduction to the radiator or convector, where convection
currents then heat the air in the room. The circulating pump is usually
electrically powered and controlled by a relay circuit that is closed when
there is a call for heat, and open when the room temperature has passed the set
point.
