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Air conditioning, often abbreviated as A/C (US) or air con (UK), [1] is the process of removing heat from an enclosed space to achieve a more comfortable interior temperature (sometimes referred to as 'comfort cooling') and in some cases also strictly controlling the humidity of internal air.
Air-side economizers also use outside air to condition spaces, but do so using fans, ducts, dampers, and control systems to introduce and distribute cool outdoor air when appropriate. An important component of natural ventilation is air change rate or air changes per hour: the hourly rate of ventilation divided by the volume of the space. For ...
A two-stage air conditioner is designed to operate on high and low settings during different weather conditions and seasons. The high setting is used during extreme weather, and the low setting is used during moderate weather. This type of air conditioner produces a balanced temperature and is in use for a longer period of time.
Most air conditioners have a fan mode, which both pushes the cool air provided by the a/c coil filled with refrigerant into the room and functions as a standalone fan when the a/c is off.
Modern Refrigeration and Air Conditioning (18th ed.). Goodheart-Wilcox Publishing. ISBN 978-1-59070-280-2. Anderson, Oscar Edward (1972). Refrigeration in America: A history of a new technology and its impact. Kennikat Press. p. 344. ISBN 978-0-8046-1621-8. Shachtman, Tom (2000). Absolute Zero: And the Conquest of Cold. Mariner Books. p. 272.
In the United States, the use of the term swamp cooler may be due to the odor of algae produced by early units. [5] Externally mounted evaporative cooling devices (car coolers) were used in some automobiles to cool interior air—often as aftermarket accessories [6] —until modern vapor-compression air conditioning became widely available.
Cooling air temperature can be improved with these guidelines: Supply cool air to the hot components as directly as possible. Examples are air snorkels and tunnels that feed outside air directly and exclusively to the CPU or GPU cooler. For example, the BTX case design prescribes a CPU air tunnel. Expel warm air as directly as possible.
There is a separate system to provide air for ventilation, dehumidification, and potentially additionally cooling. [9] Radiant systems are less common than all-air systems for cooling, but can have advantages compared to all-air systems in some applications. [10] [11] [12]