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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| chlorofluorocarbon (CFC) | generally any of several compounds comprised of
carbon, fluorine, chlorine, and hydrogen, used chiefly as refrigerants and as
blowing agents in plastic foams. Compare fluorocarbon; halocarbon |
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| circuit | 1. complete path of an electric current in or
into a building, including usually the source of electric energy. 2. assemblage of electronic components |
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| circulator | a pump |
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| clean room |
specially constructed, enclosed area
environmentally controlled with respect to airborne particulates, temperature,
humidity, air pressure, air pressure flow patterns, air motion, vibration,
viable organisms, and lighting. |
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| clean room critical surface |
in a clean room, the surface of the work part to
be protected from particulate contamination. |
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| clean room workstation | open or closed work surface in a clean room,
with direct air supply |
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| clean space | in a clean room, a defined area in which the
concentration of airborne particles is controlled within specified limits |
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| clearance | 1.
space in a cylinder not occupied by the piston at the end of the compression
stroke or the volume of gas remaining in a cylinder at the same point, measured
in percentage of cylinder volume at the end of the expansion stroke.
2.
clearance for maintenance or repair; the distance between the item requiring
maintenance and the closest interfering surface. |
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| clearance volume |
space existing between the cylinder head and the
top of the piston after completion of compression stroke |
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| clo | non‑SI unit of clothing insulation, defined as
the thermal insulation necessary to keep a sitting person comfortable in
normally ventilated room at 70°F (21°C) and 50% relative humidity. In physical
terms, the thermal resistance of one clo = .88°F·ft2·h/Btu (0.155 K.m2/W). |
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