69. Can adjusting the opening degree of the flue gas extractor inlet butterfly valve affect its speed?
Thread Content
69. Can adjusting the opening degree of the flue gas extractor inlet butterfly valve affect its speed?
The smoke extractor – main fan – generator/motor form a coaxial unit; under normal operating conditions, the speed of this unit is controlled by the rated speed of the motor, and the rated speed of the motor is determined by the power grid. Therefore, it has no impact other than on the input and output currents of the generator/motor.
The flue gas fan – the main fan – and the generator/motor form a coaxial unit. Under normal operating conditions, the speed of this unit is controlled by the rated speed of the motor, which in turn is determined by the frequency of the power grid. The amount of energy recovered by the flue gas fan can only be reflected in changes in the current flowing through the motor; it cannot change the speed of the flue gas fan itself.