GE Elec Motor from the 50's Heating Load?

[Trav682]

Hi,

I have been asked to have a contractor to place a sound encloser around a 50's model GE motor that was 2000 hp and sometime in the last 12 years was rewound to be 2500 hp. Since it was rewound GE will not give me even a suggestion of the heating load and the amount of air needed to cool it. What would be the best way to calculate this.

thanks Trav

 

[MintJulep]

If whatever the motor is driving is outside of the enclosure 20% of the input power is probably a reasonable first SWAG.

If you want to do it a bit more scientific measure the surface temperature and set up a simple heat transfer model. Solve for the heat load.

 

[chicopee]

My understanding of rewound rotors and stators is that a slightly heavier guage wire is used meaning less heat generated, therefore, use the original heat load to be on the safe side.