Glossary
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The terms and definitions included
in this glossary were taken from "ASHRAE Terminology of Heating, Ventilation,
Air Conditioning & Refrigeration".
To access the complete glossary please
visit ASHRAE's Bookstore.
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| closed process | series of changes of state in a system at the
termination of which the system is reverted to its original state |
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| coal | black to brownish‑black combustible solid formed
by the decomposition of ancient vegetation in the absence of air, under the
influence of biochemical action, moisture, pressure, and heat. |
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| coaxial cable (coax) | specially constructed single or multiconductor
cable which provides shielding from electrostatic fields. |
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| coefficient | 1.
(mathematics) number or letter, especially the former, put before a
mathematical expression to indicate that the expression is to be multiplied by
that number; as in the expression, 4ab,
4 is the coefficient of ab; in 4abx, 4ab is the coefficient of x. 2. (physics) number indicating the degree of a
quality possessed by a substance, either always or under fixed conditions; as,
the coefficient of expansion of iron. Examples:
coefficient of expansion, a number
that, when multiplied into the number expressing the rise of temperature, gives
the resulting expansion of a body; coefficient
of friction, a number that, when multiplied into the number expressing the
pressure between two bodies, gives the resulting friction; coefficient of restitution, a fraction that, when multiplied into
the relative velocity of two colliding bodies just before impact, gives their
relative velocity just afterward; differential
coefficient, ratio of the infinitesimal increase of a function to that of a
variable on which the function depends; a derivative |
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| coefficient of compressibility (compres |
coefficient required to correct the perfect gas
equation when applied to real gases. |
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| coil |
cooling or heating element made of pipe or tube
that may or may not be finned, formed into helical or serpentine shape. |
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| coil deck | insulated horizontal partition between
refrigerated space and bunker. |
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| coil depth | number of rows of the tubes in the direction of
airflow |
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| coil face area | product of the length and width of the coil face |
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| coil height | dimension of the vertical face of the coil as installed,
including only the height over tubes and fins exposed to the flow of air. Note: Some steam coils have vertical
tubes |
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