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A correction that must be employed in calorimetry to allow for heat transfer between a body and its surroundings. Also known as radiation correction.



Related Terms

RADIATION

All warm bodies emit light (electromagnetic radiation, mostly infrared). When this radiation is absorbed or emitted by a body, heat is transferred and termed 'heat transfer by radiation'. Such heat transfer requires a line of sight (view factor) and is proportional to the fourth power of the absolute temperature difference between bodies and the emissivity of the bodies.

COOLING-POWER ANEMOMETER

Any anemometer operating on the principle that the heat transfer to air from an object at an elevated temperature is a function of airspeed.

CRYOCHEMPROCESS

Afreeze-drying technique involving conduction heat transfer to the frozen solid held on a metallic surface.

HEATING COIL

Heat transfer device consisting of a coil of piping, which releases heat.

CONDUCTION

The transfer of heat by molecular collision. This process is more efficient in metals and other thermal conductors and poorer in fluids and insulators such as refractory.

FILM BOILING

Boiling in which a continuous film of vapor forms at the hot surface of the container holding the boiling liquid, reducing heat transfer across the surface.

BULYGEN NUMBER

A dimensionless bump contact number used in the study of heat transfer during evaporation.

CANDU REACTOR

The Canadian version of the nuclear reactor; the main difference from other reactors is the use of heavy water as a moderator and heat transfer medium.

HEAT PUMP

A heat transfer device that uses the heat rejected by a refrigeration process to provide heat. A combined cooling and heating unit.

CONVECTION COOLING

Heat transfer by natural, upward flow of hot air from the device being cooled.

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