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Compressed Air Glossary of Terms :: E ::
Glossary Index
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Effective area
-
The area (in sq inches) of the filter element that is exposed
to the flow of air or fluid for effective
filtering.
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Efficiency
-
Ability of a filter to remove particle matter from an air
stream. Measured by comparing concentrate of material upstream and
downstream of the filter. Typical particulate sizes range from .3
micron to 50 micron.
-
Efficiency
compression
-
Is the ratio of the theoretical work requirement to the actual
work required to be performed on the gas for compression and
delivery.
-
Efficiency
isothermal
-
Is the ratio of the theoretical work calculated on an
isothermal basis to the actual work transferred to the gas during
compression.
-
Efficiency
mechanical
-
Is the ratio of the thermodynamic work requirement in the
cylinder to actual brake horsepower requirement.
-
Efficiency
polytropic
-
Is the ratio of the polytropic compression energy transferred
to the gas to the actual energy transferred to the
gas.
-
Efficiency
volumetric
-
Is the ratio of actual capacity to piston displacement, stated
as a percentage.
-
Ejector compressor
-
A compressor belonging to the group of dynamic
compressors.
-
Element
-
The medium or material that does the actual filtering or
separating. May be paper, wire mesh, special cellulose, inorganic
plastic, or a combination.
-
Emulsibility
-
The ability of a non-water-soluble fluid to form an emulsion
with water.
-
Emulsifier
-
Additive that promotes the formation of a stable mixture, or
emulsion, of oil and water. Common emulsifiers are: metallic
soaps, certain animal and vegetable oils, and various polar
compounds.
-
Emulsion
-
Intimate mixture of oil and water, generally of a milky or
cloudy appearance. Emulsions may be of two types: oil-in water
(where water is the continuous phase) and water-in-oil (where
water is the discontinuous phase).
-
End cap
-
A ported or closed cover for the end of a filter
element.
-
Energy audit
-
A survey that shows how much energy you use in your compressed
air generation. It will help find ways to use energy more
efficiently.
-
Energy conservation
-
Practices and measures that increase energy
efficiency.
-
Energy kinetic
-
Is the energy a substance possesses by virtue of its motion or
velocity. Used primarily in calculations for dynamic and ejector
type compressors.
-
Energy storage
-
The ability to convert energy into other forms, such as heat
or chemical reaction, so that it can be retrieved for later use.
Also the development, design, construction and operation of
devices for storing energy until needed. Technology includes
devices such as compressed gas.
-
Enthalpy
-
Is the sum of the internal and external
energies.
-
Entrainment ratios
-
Are used with ejectors to convert weight of gas and/or water
vapor handled to or from equivalent air.
-
Entropy
-
Is a measure of the unavailability of energy in a
substance.
-
Environmental
contaminant
-
all material and energy present in and around an operating
system, such as dust, air moisture, chemicals, and thermal
energy.
-
Evaporation
-
The escape of water molecules from a liquid to the gas phase
at the surface of a body of water.
-
Evaporator
-
The chamber located on suction side of cap tube, in which
freon is evaporated to cause cooling in a refrigeration system.
-
Exothermic
-
A term used to describe a chemical process in which heat is released. For
example, combustion is an exothermic process because heat is released.
-
Expanders
-
Turbines or engines in which gas expands, does work, and
undergoes a drop in temperature.
Glossary Index
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Thanks to Impact RM for permission to reprint the glossary.
Compressed Air Glossary © Impact RM
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