RADIATOR
Radiators are heat exchangers used to transfer thermal energy from one medium to another for the purpose of cooling and heating. The majority of radiators are constructed to function in automobiles , buildings , and electronics . The radiator is always a source of heat to its environment, although this may be for either the purpose of heating this environment, or for cooling the fluid or coolant supplied to it, as for engine cooling . The heating radiator was invented by Franz San Galli , a Polish-born Russian businessman living in St. Petersburg , between 1855–1857. Radiation and convection One might expect the term "radiator" to apply to devices that transfer heat primarily by thermal radiation (see: infrared heating ), while a device which relied primarily on natural or forced convection would be called a "c...