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Thermosiphon (alternatively spelled thermosyphon) refers to a method of heat exchange through a phase change heat pump that depends on gravity. It allows the cooling and heating of objects by changing the phase of a liquid inside a closed system that relies on the principles of convection and gravity to move the fluid through the system. A heat exchanger is a device for transferring heat from one fluid to another, where the fluids are separated by a solid wall so that they never mix. ...
A phase change heat pump employs a liquid with a low boiling point to transfer heat from cooler space to a warmer space; generally in a refrigeration application. ...
In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ...
An open system can be influenced by events outside of the declared boundaries of the system. ...
Convection is the transfer of heat by the motion of or within a fluid. ...
Gravity is the force of attraction between massive particles. ...
Convection is needed to move heated liquids (i.e. vapour) upwards in the system whereupon it can be replaced by cooler liquids returning from the rest of the system by gravity. Vapor (US English) or vapour (British English) is the gaseous state of matter. ...
The thermosiphon has been sometimes incorrectly described as a 'gravity return heat pipe' [1]. A wick is a necessary feature of heat pipe to allow the movement of heat, whereas this function is not needed in a thermosiphon as gravity allows the movement of the liquids [2]. The wick allows heat pipes to conduct heat exchange against gravity (so leading to heat pipe use in space applications); against this a thermosiphon can be seen as a 'simpler' heat pipe [3]. A heat pipe is a heat transfer mechanism that can transport large quantities of heat with a very small difference in temperature between the hot and cold interfaces. ...
Solar energy
Thermosiphon is used in solar heating systems to describe a method of heating water. The water is heated passively by solar energy and relies on heat energy being transferred from the sun to a solar collector. The heat for the collector can be transferred to water in two ways: directly where water circulates through the collector, or indirectly where an anti-freeze solution carries the heat from the collector and transfers it to water in the tank via a heat exchanger. Convection (that is the heated liquid will move upwards) allows for the movement of the heated liquid out of the solar collector to be replaced by colder liquid which is in turn heated. The water is stored in a tank above the collector due to this principle. Solar heating is a style of building construction which uses the energy of sunshine to heat a structure. ...
Water (from the Old English word wæter; c. ...
Passive has several meanings: In grammar it describes a grammatical voice. ...
Solar power describes a number of methods of harnessing energy from the light of the sun. ...
Heat Energy is energy created by the motion of atoms and molecules in a body. ...
A laundromat in California with solar collectors on the roof. ...
Antifreeze - motor vehicle coolant Antifreeze protein - fish-related biology This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ...
A heat exchanger is a device for transferring heat from one fluid to another, where the fluids are separated by a solid wall so that they never mix. ...
Convection is the transfer of heat by the motion of or within a fluid. ...
A laundromat in California with solar collectors on the roof. ...
Computing Thermosiphon is used in computing to describe a watercooling system for the internal computer components in general, and mainly referring to the processor. While any suitable liquid can be used, water is the easiest substance for thermosiphon systems. Unlike traditional watercooling systems thermosiphon systems do not rely on a water pump (or a pump for other liquids) but rely on convection for the movement of heated water (which becomes vapour) from the components upwards to a heat exchanger, where the water is cooled and ready to be used again. The exchanger most commonly used is a radiator where air blown through a fan system actively condenses down the vapour to a liquid. This can in turn re-circulate through the system so repeating the process. No pump is required - the vaporization and condensation cycle is self sustaining. Watercooling is a method of heat removal from components. ...
Watercooling is a method of heat removal from components. ...
Radiator a common term for several types of heat exchanger. ...
In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ...
Uses Modern processors get exceedingly hot. Even with a common heat sink and fan cooling the processor, that still may reach temperatures up to 70 Degrees Celsius (158 Degrees Fahrenheit), and still be able to function. A thermosyphon can handle heat output at a much wider range that any heat sink and fan can, and cool a processor 10-20 Degrees Celsius colder. A thermosyphon is also less bulkier that a normal heat sink and fan.
Drawbacks Thermosyphons must be mounted such that vapor rises up and liquid flows down to the boiler with no bends in the tubing for liquid to pool. Also, the thermosyphons' fans that cool the gas need cool air to operate.
See also A phase change heat pump employs a liquid with a low boiling point to transfer heat from cooler space to a warmer space; generally in a refrigeration application. ...
Convection is the transfer of heat by the motion of or within a fluid. ...
Solar heating is a style of building construction which uses the energy of sunshine to heat a structure. ...
Watercooling is a method of heat removal from components. ...
A heat pipe is a heat transfer mechanism that can transport large quantities of heat with a very small difference in temperature between the hot and cold interfaces. ...
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