Water jacket

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Water jacket

A water jacket is a water-filled void

Void

A void is an empty space. When used as an adjective, the word can also mean "invalid"....
surrounding a device, typically a metal sheath having intake and outlet vents to allow water to be pumped through the void. The flow of water to an external heating or cooling device allows precise temperature control of the device.

r jackets are often used in watercooling

Watercooling

Water cooling is a method of heat removal from components. As opposed to air cooling, water is used as the heat transmitter. Water cooling is commonly used for cooling internal combustion engines in automobiles and large electrical generators....
. They are also used in laboratory glassware

Laboratory glassware

Laboratory glassware refers to a variety of equipment, traditionally made of glass, used for scientific experiments and other work in science, especially in chemistry and biology laboratory....
- Liebig, Graham and Allihn condensers.

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Encyclopedia

A water jacket is a water-filled void

Void

Applications

Water jackets are often used in watercooling

Watercooling

Laboratory glassware

Machine gun

A machine gun is a Automatic firearm mounted or portable firearm, usually designed to fire List of rifle cartridgess in quick succession from an Belt or large-capacity Magazine , typically at a rate of several hundred rounds per minute....
s such as the Browning M1917 or Vickers gun. Nowadays, barrels of machine guns are air-cooled to reduce weight and complexity since steel quality has advanced over the decades. Water jackets are commonly used around a nuclear power

Nuclear power

Nuclear power is any nuclear technology designed to extract usable energy from atomic nucleus via controlled nuclear reactions. The only method in use today is through nuclear fission, though other methods might one day include nuclear fusion and radioactive decay ....
core to contain radiation

Radiation

In physics, radiation describes any process in which energy emitted by one body travels through a medium or through space, ultimately to be absorbed by another body....
.

In a reciprocating piston internal combustion engine

Internal combustion engine

The internal combustion engine is an engine in which the combustion of a fuel occurs in a combustion chamber inside and integral to the engine. In an internal combustion engine it is always the expansion of the high temperature and pressure gases that are produced by the combustion which apply force to the movable component of the engine, such as...
, like those in a typical automobile

Automobile

An automobile or motor car is a wheeled motor vehicle for transportation passengers, which also carries its own car engine or motor. Most definitions of the term specify that automobiles are designed to run primarily on roads, to have seating for one to eight people, to typically have four wheels, and to be constructed principally f...
, the water jacket is a series of holes either cast or bored through the main engine block and connected by inlet and outlet valves to the radiator

Radiator (engine cooling)

Radiators are used for cooling internal combustion engines, chiefly in #Automobiles but also in #Aircraft, railway locomotives, motorcycles, stationary generating plant or any similar use of such an engine....
.

Tissue culture

Tissue culture

Tissue culture is the growth of biological tissue and/or cell separate from the organism. This is typically facilitated via use of a liquid, semi-solid, or solid growth medium, such as broth or agar....
incubators in laboratories are often water-jacketed to help keep their temperature stable.