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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You can always search for terms. |
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| R |
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| radiation pasteurization | irradiation, using moderate doses, to enhance
keeping quality by killing most of the spoilage microorganisms present; viruses
are not affected. |
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| radiation shield | 1. device designed to intercept radiated heat. 2. in a furnace, a sheet of metal or other
material supported between the heat exchanger and the casing to protect the
casing from heat; not to be considered as a heat transfer surface |
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| radiation sterilization | irradiation using high doses to kill the
microorganisms present. |
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| radiator (convector radiator) | terminal unit used in hot water or steam systems
to deliver heat to a space (but primarily by convection and not radiation). |
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| radiometer |
instrument for measuring irradiance in energy or
power units |
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| radiosity |
total radiant flux that leaves unit area of a
surface. The sum of radiant flux emitted and reflected by the surface, plus any
radiant flux transmitted through that surface. Compare exitance |
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| RAM |
random access memory (computer |
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| range |
1.
difference between the highest and the lowest operational values, such as
pressure, temperature, rate of flow, or computer values. 2. region between limits within which a quantity
is measured, transmitted, or received, expressed by stating the lower and upper
range values |
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| rate base (electric) |
monetary value established by a regulatory
authority, on which a utility is permitted to earn a specified rate of return |
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| rating |
assigned value of those performance
characteristics (under standard rating conditions) by which a unit may be
selected to fit its application. Note:
These values apply to all units of like (nominal) size and type
(identification) produced by the same manufacturer.
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