Motor and Pump applications simple formula can save energy by helping effective design for using maximum efficiency of your equipment.
Some times we ignore these basic design formula and use larger size of equipment using thumprole formula which cases extra money energy as wastage.
Some times we ignore these basic design formula and use larger size of equipment using thumprole formula which cases extra money energy as wastage.
Centrifugal Applications
AFFINITY LAWS
The Affinity Laws of centrifugal pumps or fans indicates the influence on volume capacity, head (pressure) and/or power consumption of a pump or fan due to
 change in speed of wheel  revolutions per minute (rpm)
 geometrically similarity  change in impeller diameter
Following three affinity formulas are related with simply motor horse power, RPM (revolution per minute), Flow and pressure.
Flow_{2}

=

RPM_{2}

Flow_{1}

RPM_{1}

Pres_{2}

=

(RPM_{2})^{2}

Pres_{1}

(RPM_{1})^{2}_{}

HP_{2}

=

(RPM_{2})^{3}

HP_{1}

(RPM_{1})^{3}_{}

_{}
Where:
Pres=Pressure
RPM= Revolutions Per Minute
FANS AND BLOWERS
Centrifugal Fans and Blowers typically have one of seven types of wheels that draw the air into the inlet of the blower housing, through the wheel, and discharges it at 90 degrees out through the discharge of the housing.
The two most common types of Centrifugal Blowers are Pressure Blowers and Volume Blowers.
Fans and Blowers are very common uses in industry, Basic three formula can help you to design effective and perfect size of fan and blower as your desired.
HP =_{}

CFM x PSF

33000 x Efficiency of Fan_{}

HP =_{}

CFM
x PIW

6356
x Efficiency of Fan_{}

HP =_{}

CFM
x PSI

229
x Efficiency of Fan_{}

Where:
CFM= Cubic Feet per Minute
PIW= Inches of Water Gauge
PSF= Pound per Square Foot
PSI= Pound per Square Inches
PUMPS
_{Pump is a
device that moves fluids (liquids or gases), or sometimes slurries, by
mechanical action. Pumps can be classified into three major groups according to
the method they use to move the fluid: direct lift, displacement, and gravity
pumps.}
Perfect capacity of pump design and operation is very important which can help the following two simple formula.
HP
=_{}

GPM x FT x Specific Gravity

3960 x Efficiency of Pump_{}

HP
=_{}

GPM x PSI x Specific Gravity

1713 x Efficiency of Pump_{}

Where:
FT=
Head in Feet
GPM=
Gallons Per Minute
PSI=
Pounds Per Square Inch
VOLUME OF LIQUID IN A TANK
Gallons= 5.875 x D^{2 }x
H
1 gallon (US) of water
weights 8.33 lb
Specific gravity of
water 1.0
Where:
D= Diameter of Tank in
feet
H= Height of liquid in
feet
Motor Application Formulas
Following motor applications formula is necessary everyday every moment. It will help to calculate your motor's HP (Horse Power), Kilowatts, Torque in Poundfeet or Newtonmeter.
HP(Horse Power)
=_{}

Torque (lbft) x RPM

5252_{}

Kilowatts =_{}

Torque (Nm) x RPM

9550_{}

Torque (lbft) =_{}

Horse Power (HP) x 5252

RPM_{}

Torque (Nm) =_{}

Kilowatts x 9550

RPM_{}

_{1HP= 746 watts}
Hope motor and pump application formula will help to design a smart and effective energy saving initiative.
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