Centrifugal Fans AT belt driven - Nicotra Gebhardt
Centrifugal Fans AT belt driven - Nicotra Gebhardt
Centrifugal Fans AT belt driven - Nicotra Gebhardt
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Description<br />
Symbol / Unit / Definition<br />
A-A -<br />
A 2<br />
242<br />
mm²<br />
b mm<br />
D r<br />
f BP<br />
f c<br />
f p<br />
F p<br />
f pd<br />
f h<br />
mm<br />
Hz<br />
Hz<br />
-<br />
N<br />
-<br />
-<br />
J kgm²<br />
K m²s/h<br />
L T<br />
L Mg<br />
L Mu<br />
L pA4<br />
L pA7<br />
L WA<br />
L WA4<br />
L WA7<br />
L Wfc4<br />
L Wfc7<br />
mm<br />
mm<br />
mm<br />
dB<br />
dB<br />
dB<br />
dB<br />
dB<br />
dB<br />
dB<br />
L Wrel4 dB<br />
L Wrel7 dB<br />
L 10h<br />
h<br />
m kg<br />
N 1/min<br />
N max<br />
p a<br />
P a<br />
P b<br />
p d2<br />
p F<br />
1/min<br />
Pa<br />
kW<br />
kW<br />
Pa<br />
Pa<br />
Operational range (free discharge)<br />
Fan outlet area<br />
Deflection of <strong>belt</strong> under test force<br />
Impeller diameter<br />
Blade passing frequency<br />
Octave centre frequency<br />
Motor size correction factor<br />
Test force<br />
Dynamic pressure correction factor (free discharge)<br />
Correction at actual efficiency<br />
Moment of inertia<br />
Calibration factor for volumeter<br />
Centre distance<br />
Measuring marks before tensioning (flat <strong>belt</strong>s)<br />
Measuring marks after tensioning (flat <strong>belt</strong>s)<br />
A weighted sound pressure level (discharge)<br />
A weighted sound pressure level (inlet)<br />
A weighted sound power level<br />
In duct sound power level (discharge)<br />
Casing and free inlet sound power level<br />
Discharge sound power in the octave bands<br />
Inlet sound power in the octave band<br />
Relative sound power (discharge)<br />
Relative sound Power (inlet)<br />
Nominal bearing life<br />
Mass<br />
Fan speed<br />
Maximum fan speed<br />
Atmospheric pressure<br />
Absorbed fan power<br />
Bearing power losses<br />
fan dynamic pressure at discharge<br />
Total fan pressure<br />
P N<br />
p sF<br />
kW<br />
Pa<br />
gp Pa<br />
gp 0<br />
Pa<br />
gp Dü Pa<br />
q v<br />
q Vopt<br />
R W<br />
m³/h<br />
m³/h<br />
t °C<br />
t a<br />
t A<br />
t 1<br />
J/kg×K<br />
°C<br />
s<br />
°C<br />
Θ K<br />
u m/s<br />
v 2<br />
v m2<br />
m/s<br />
m/s<br />
X mm<br />
z -<br />
e* mm<br />
h a<br />
h r<br />
h s<br />
%<br />
%<br />
%<br />
r kg/m²<br />
r 1<br />
kg/m²<br />
Belt Driven <strong>Centrifugal</strong> <strong>Fans</strong> / Description<br />
The following symbols are used in this catalogue: The following symbols are used in this catalogue:<br />
Motor power (nominal)<br />
Fan static pressure (free discharge)<br />
Differential pressure<br />
Pressure difference at the inlet measuring device<br />
Pressure difference at the inlet cone<br />
Volume flow rate<br />
Volume flow at optimum efficiency<br />
Specific gas constant<br />
Temperature of flow medium<br />
Temperature of discharge air in test chamber<br />
Acceleration time<br />
Air temperature<br />
Thermodynamic temperature at fan inlet<br />
Tip speed<br />
Outlet velocity<br />
Average fluid velocity at discharge<br />
Pulley position on shaft extension relative to bearing<br />
No. of blades<br />
Stretching value of flat <strong>belt</strong><br />
Total efficiency at max speed<br />
Impeller efficiency<br />
Fan total efficiency at max speed<br />
Air density<br />
Air density at fan inlet
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