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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| entry loss | loss in pressure caused by a fluid stream
flowing into a pipe, duct hood, or vessel |
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| environment |
water, land, and air and the interrelationship
that exists among and between them and all living things. |
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| environmental chamber (climatic chamber) | enclosed space in which it is possible to
simulate particular environments |
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| environmental conditions |
natural or controlled conditions of air and
radiation prevailing around a person, an object, a substance, etc. |
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| enzyme | complex organic substance (such as diastase,
pepsin, etc.) capable of transforming other compounds by catalytic action; a
soluble ferment. |
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| equalizer | 1.
piping arrangement on an enclosed compressor to equalize refrigerant gas
pressures in crankcase and suction; also a device for dividing the liquid
refrigerant between parallel low-side coils; also a piping arrangement to
divide the lubricating oil between the crankcases of compressor operating in
parallel or in tandem.
2.
piping arrangement to maintain a common liquid level or pressure between two or
more chambers.
3.
piping arrangement to equalize steam header pressure and condensate return
pressure in a steam boiler. |
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| equivalent direct radiation (EDR) |
thermal radiation
expressed in terms of square foot of steam radiator surface emitting 240 Btu
per hour. It is the same as an area in square metres,each of which radiates 757
watts per square metre. Note: Do not
use this I-P term in SI. |
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