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Air cooling is a method of dissipating heat. It works by making the object to be cooled have a larger surface area or have an increased flow of air over its surface, or both. An example of the former is to add fins to the surface of the object, either by making them integral or by attaching them tightly to the object's surface (to ensure efficient heat transfer). In the case of the latter it is done by using a fan blowing air into or onto the object one wants to cool. In many cases the addition of fins adds to the total volume of material making a heatsink that makes for greater efficiency in cooling. For other uses, see Heat (disambiguation) In physics, heat, symbolized by Q, is energy transferred from one body or system to another due to a difference in temperature. ...
A large copper heatsink. ...
For other uses, see Fan. ...
Look up air in Wiktionary, the free dictionary. ...
A large copper heatsink. ...
In all cases the air has to be cooler than the object or surface from which it is expected to remove heat because thermodynamics says that heat moves from higher to lower levels. Thermodynamics (from the Greek θεÏμη, therme, meaning heat and δυναμις, dynamis, meaning power) is a branch of physics that studies the effects of changes in temperature, pressure, and volume on physical systems at the macroscopic scale by analyzing the collective motion of their particles using statistics. ...
Examples
Vehicles Air is mainly used for cooling internal combustion engines (ICE), particularly those powering aircraft, because it is a readily available fluid and is often at a suitable temperature to be used efficiently. While many such ICE are called "liquid cooled" the cooling liquid is usually cooled by air passing through a radiator or heat exchanger. Examples of direct aircooling in automobiles are the flat or boxer engines such as in the pre-1996 model Porsche 911, the VW Beetle, the Chevrolet Corvair, the Citroën 2CV, the 247 BMW and some early Honda keicars. Air-cooled engines rely on the circulation of air directly over hot parts of the engine to cool them. ...
An internal combustion engine is an engine that is powered by the expansion of hot combustion products of fuel directly acting within an engine. ...
Not to be confused with radiata. ...
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. ...
“Car†and “Cars†redirect here. ...
The Boxer engine, first patented by German engineer Karl Benz A flat engine is an internal combustion engine with pistons that are all relatively horizontal. ...
Porsche 911 in hillclimb The Porsche 912 (pronounced as nine eleven) is a sports car made by Porsche AG of Stuttgart, Germany. ...
The Volkswagen Beetle or Bug is a small family car, the best known car of Volkswagen, of Germany, and almost certainly the world. ...
Corvair convertible The Chevrolet Corvair was an automobile produced by the Chevrolet division of General Motors from 1960 to 1969. ...
First generation Ripple Bonnet Citroën 2CV built from 1948 to 1960 The Citroën 2CV (French: deux chevaux, literally two horses, from the tax horsepower rating) was an economy car produced by the French automaker Citroën from 1948 to 1990. ...
The BMW 247 is an air-cooled flat twin motorcycle engine, also known as the Airhead Boxer. It was used by BMW in its motorcycles from 1969 to 1995. ...
Turbines Gas turbine engines (e.g. turbojets, turbofans, etc) incorporate turbines, which are exposed to the hot gases exiting the combustion chamber. Where necessary, relatively cold air is bled from the compression system and used to cool the turbine blades and vanes, to prevent them from melting.
Electronics Its use is widespread in computers and CPU cooling, where the computer processors produce large quantities of heat that, if not dissipated, could damage the CPU and other electronic components. In this case air has the advantage of being a good insulator too. However, in the future, new processors might generate too much heat to be dissipated through direct air cooling and it would follow that such direct cooling for computers and their components will become obsolete. A fan blowing at a CPU heatsink. ...
CPU redirects here. ...
This article or section is in need of attention from an expert on the subject. ...
Industries A very large number of industrial processes use air as a cooling medium, either directly or indirectly. Air conditioning is a very common process in which the air in a room, or a whole building, is cooled in order to maintain a comfortable environment for its occupants. Often the air has been cooled by chilled water or brine and the heat transferred to that medium is transported outside the building where, often, fan-driven water-to-air heat exchanging is again effected to reject the heat into the atmosphere. A common sight around, for example, power stations are the large waisted concrete towers that emit steam more or less constantly. These are, in part, using air cooling on a grand scale. Note: in the broadest sense, air conditioning can refer to any form of heating, ventilation, and air-conditioning. ...
For the sports equipment manufacturer, see Brine, Corp. ...
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. ...
For other uses, see Power station (disambiguation). ...
See also Computer cooling is the process of removing heat from computer components. ...
A set of 4 industry standard 80mm fans, most commonly used in personal computers. ...
Evaporative cooling is a system in which latent heat of evaporation is used to carry heat away from an object to cool it. ...
Watercooling is a method of heat removal from components. ...
Oil cooling is the principle behind the device oil cooler. ...
A heat sink (aluminium) with heat pipe (copper) A heat pipe is a heat transfer mechanism that can transport large quantities of heat with a very small difference in temperature between the hotter and colder interfaces. ...
The Peltier-Seebeck effect, or thermoelectric effect, is the direct conversion of heat differentials to electric voltage and vice versa. ...
A heater core is a radiator like device used in heating the cabin of a vehicle. ...
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