Inventions that Changed the World - IEWho invented Radio?
The purpose of the heat exchanger is to transfer thermal energy from one medium to another.Most of the radiators are used in cars, buildings, and electronics.There is a citation needed.
It's always a source of heat to the 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 automotive engine cooling and HVAC dry cooling towers.The bulk of the heat is transferred via convection rather than thermal radiation.There is a citation needed.
The Roman hypocaust is an example of a type of radiator.An American named Joseph Nason received a number of U for his invention of a primitive radiator in 1841, but he was not the one who was credited with inventing the heating radiator.[5]
The usual mechanisms for heat transfer from a radiator are thermal radiation, convection into flowing air or liquid, and conduction into the air.It is possible to transfer heat by phase change, for example, drying a pair of socks.The termradiator refers to any of a number of devices in which a liquid circulates through exposed pipes."Convector" is a class of devices in which the source of heat is not directly exposed.
In order to increase the surface area available for heat exchange with the surroundings, a radiator has multiple fins in contact with a tube.In contact with the fins, air carries off heat.If air flow is disrupted by dirt or damage to the fins, that part of the radiator is useless at heat transfer.
European buildings are often used to heat.In a radiative central heating system, hot water or steam is generated in a central boiler and then transferred to the surroundings through the use of pumps in the building.
Dry cooling towers and closed loop towers are used for cooling buildings using liquid-cooled chillers that are isolated from the surroundings.
In automobiles, but also in aircraft, railway locomotives, motorcycles, stationary generating plants and other places where heat engines are used, there are Radiators used for cooling internal combustion engines.The typical North American electricity transformer uses polychlorinated biphenyl oil to discharge excess heat to the environment.There is a citation needed.
To cool down the heat engine, a coolant is passed through the engine block.The hot coolant is fed into the inlet tank of the radiator, from which it is distributed across the core through tubes to another tank on the opposite end.When the coolant passes through the tubes on its way to the other tank, it transfers a lot of the heat from the fins in the row of tubes to them.The heat is released from the fins to the air.Increasing the exchange efficiency is achieved by increasing the contact surface of the tubes to the air.The cooled coolant is fed back to the engine.The cooling of the engine by temperature activated fans is enough to keep it from damaging the system.There is a citation needed.
The addition of glycols to prevent freezing is one of the reasons why this is usually water-based.It is possible that the coolant is also an oil.All but the smallest engines use pumps to circulate the coolant.There is a citation needed.