Increasing Blower Capacity?

hello,

first you have to refer to specification of blower. Normally, a Blower produces air in 02 factors: Volume and pressure. They are according to shape and size of propeller.

The shape and size of propeller is fix with a specific cuver (speed, volume, pressure and power) so event increasing the speed or power the efficiency of blower shall not increase much. you may waste money to do this.

Regards

Best to consult blower manufacturer.U have not mentioned the motor rpm and blower rpm.

Hi all,

Sorry by my ignorance, but can you clarified the following acronyms:

pd? (I suppouse "positve displacement")

og?

Regards

Ernesto

It is quite probable that you can, indeed, increase the output of this PD blower by increasing the rotational speed of the blower.

The first consideration is the capability of the blower to accommodate the increased speed. You must consult the blower manufacturer's literature to ascertain what is the maximum allowable speed of the blower. If the 850m3/hr is achievable with this blower within its allowable maximum speed, then you can calculate the sizes of the sheaves that you need to attain the required speed.

The second consideration is the power of the new motor you will need to achieve the results you want. Again, you must consult the manufacturer's literature to find the required motor Kw for the job. Once you have found that information, you will know if the 37Kw motor is sufficient for your needs.

In my haste, I failed to consider the discharge pressure that you are working against. This, of course, would be shown on the manufacturer's curves. The required 850m3/hr would be shown on the curves at various pressures that must be considered. The higher the pressure, the more Kw required to achieve it. The pressure is not contingent upon the speed of the blower. That characteristic has very little relevance to the speed of the blower since this is a positive displacement blower. Boyle's Law would affect the delivery volume, but that is taken into consideration in the manufacturer's curves..

capacity is increased by increasing rpm of the blower.

can u give present rpm , pressure of the blower?

So that i will give u reqd. blower rpm & BKW .

Sanjay

Yes - provided the electrical supply, its cabling, and the motor overload protection device are reviewed for suitability, as potentially the feeder cable(s) has/have to be able to supply safely 68% more power.

For an air-moving device, the power requirement presented to the load varies with about the cube of the impeller tip speed. Increasing the flowrate by the figures indicated will therefore present an increase in demand of around 40-50%.

If in doubt, consult a qualified local Electrician, who will be able to calculate the revised arrangement using the electrical standards prevailing at the location of the installation; in the UK that would be British Standard 7671.