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Circulated water that removes the heat from an internal combustion engine. Circulated water that removes the heat of compressing and condensing the refrigerant in refrigeration systems.

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A row of water tubes lining a furnace or combustion chamber, exposed to the radiant heat of the fire.


A closed vessel in which water is heated, steam is generated, steam is superheated, or any combination thereof, under pressure or vacuum by the application of heat from combustible fuels, electricity, or nuclear energy. The term dose not include such facilities of an integral part of a continuous processing unit but does include fired units of heating or vaporizing liquids other than water where these units are separate from processing systems and are complete within themselves.


The heat value of a combustion process assuming that none of the water vapor resulting from the process is condensed out, so that its latent heat is not available. Also known as lower heating value; net heating value.


The rapid reaction of fuel and oxidant (usually oxygen in air) to produce light, heat and noise. Major products of combustion for hydrocarbon fuels (e.g., natural gas, refinery gas, fuel oils) are carbon dioxide and water vapor. Trace products include carbon monoxide and nitrogen oxides, which are pollutants.


Boiler that has water in the tubes with heat and combustion gases around the tubes.


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.


A refrigeration system for household use which typically has a compression machine designed for continuous automatic operation and for conservation of the charges of refrigerant and oil, and is usually motor-driven and air-cooled. Also known as refrigerator.


Heat exchanger in which water flows by gravity over the outside of the tubes or plates.


Amount of heat released during combustion of fuels. One of the criteria for determining what burner to use in an application.


The lowest temperature to which air can be cooled at any given time by evaporating water into it at constant pressure, when the heat required for evaporation is supplied by the cooling of the air. This temperature is indicated by a well-ventilated wet-bulb thermometer. See also FREE-AIR TEMPERATURE.

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