Water-air convective cooling radiator
Water is a chemical substance used to transfer heat by the means of thermal radiation in air convective cooling radiators. To understand deeply one has to understand meaning of convection and radiator and how it works.
Convection is the mode of heat transfer. The heat transfer takes place through diffusion and by advection. Heat is transferred through a fluid which is in motion and thus transfers energy.
Radiators are heat exchangers that transfer thermal energy from one medium to another with the motion of water for the purpose of cooling and heating.
Water based air convective cooling radiators are used in automobiles for the transfer of heat. They work on coolant supply which carries the heat from the engine and act as a source of heat to its environment though its main function is to cool the engine.
Water has high heat capacity, a reason why most of power plants in U.S. are dependent on the heat exchanging properties of water.