A fan rated at 4.45kW blows 250 cubic meter /min of air through a 750kW motor to carry away the heat. If the inlet temperature is 22°C and the outlet temperature is 31°C, estimate the losses in the motor.

A fan rated at 4.45kW blows 250 cubic meter /min of air through a 750kW motor to carry away the heat. If the inlet temperature is 22°C and the outlet temperature is 31°C, estimate the losses in the motor.

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter15: Residential Air-conditioning Control Systems

Section: Chapter Questions

Problem 2RQ

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Stator and Rotor Magnetic Field

The stator and rotor magnetic field is the resulting magnetic field generated by a system of coils that are symmetrically aligned. They are supplied with polyphase currents. The magnetic field is generated by poly-phase (two or more phases) current or single-phase current. In the latter case, two field stator windings are supplied and two resulting electromagnetic fields are generated beyond the stage.

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