Pressure drop in a large industrial motor
Pressure drop in a large industrial motor
(OP)
Hi,
I'm trying to work out the pressure drop in a 4778kW, 4kV, 60Hz, industrial motor.
The airflow/cooling air is generated by the motor through the vent spacers.
There are 8 inlet air vents of 135000mm^2 each with a minimum steel mesh area of 45% on each mesh. 4 at each side of the motor, the outlet air vents are sandwiched between the the air inlets at either side, therefore there are 4 oulet air vents.
Outlet air vents are 718900mm^2.
Total air quantity for the motor is 5.189E9mm^3/s;
the velocity of air through the inlet ducts is 9.563E4mm^2/s;
the velocity of air through the outlet ducts is 8.081E3mm^2/s
Could anyone help me with regards to calculations involved in this analysis?
I'm trying to work out the pressure drop in a 4778kW, 4kV, 60Hz, industrial motor.
The airflow/cooling air is generated by the motor through the vent spacers.
There are 8 inlet air vents of 135000mm^2 each with a minimum steel mesh area of 45% on each mesh. 4 at each side of the motor, the outlet air vents are sandwiched between the the air inlets at either side, therefore there are 4 oulet air vents.
Outlet air vents are 718900mm^2.
Total air quantity for the motor is 5.189E9mm^3/s;
the velocity of air through the inlet ducts is 9.563E4mm^2/s;
the velocity of air through the outlet ducts is 8.081E3mm^2/s
Could anyone help me with regards to calculations involved in this analysis?





RE: Pressure drop in a large industrial motor
Is this to optimize the construction of the cooling flow 'lead' through the motor or what?
In my opinion it would be better to find a way to measure the pressure at both ends, the pressure loss would be guessed to be so low that any approximating calculation would be unsure or give a too wide variation.
The temperature diference entering and going out would be essential to know anyway as part of the calculation. (May (p1 x v1)/T1 =(p2 x v2)/T2 be used? p2 + delta p = p1. Anyone?)
RE: Pressure drop in a large industrial motor