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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| ice making water forecooler | device for cooling water before it is fed into
the ice cans.
ice-melting equivalent heat absorbed by ice at
32°F (0°C) in liquefying to water at 32°F (0°C). For precise data, 143.5
Btu/lb. (334.4 kJ/kg); for definition of ton, 144 Btu/lb. |
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| ice point (melting point) |
1.
equilibrium temperature of ice and water (usually at standard atmospheric
pressure). 2. temperature at which water freezes under
normal atmospheric pressure 14.696 psig, 32°F (101.325 kPa, 0°C). |
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| ice regelation |
1.
refreezing phenomenon; for ice, after removal of pressure induced by contacting
materials, such as ice skates, wheels, wires, and bars.
2.
refreezing of the water film that forms on or within ice when the pressure from
applied material is sufficient to reduce the freezing point to below the ice
temperature at that location. |
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| ice storage system | thermal storage system, used for chilling
processes or for comfort cooling, that uses the phase change of ice to water.
Ice is formed during periods of low refrigerating demand, for delivery of
cooling during periods of high refrigerating demand |
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| ID |
1. induced draft.
2. inside diameter. 3. internal dimension |
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| ignition |
initiation of combustion. Note: Combustion may be evidenced by glow, flame, detonation, or
explosion. The combustion may be sustained or transient |
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| illuminance |
luminous (photometric) irradiance. |
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| impact pressure | velocity pressure plus static pressure
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| impedance | total restriction (resistance and reactance)
that an electrical circuit presents to the flow of an alternating current;
specifically the ratio of voltage to current and the phase angle between them. |
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| impeller (rotor; wheel) |
rotating part of a device (fan, blower,
compressor, or pump) that moves fluid. See also fan. |
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