Question for mechanical engineers: Replacing blower motor to a lower rating one

**boybi** · February 5th, 2015 01:13 PM

We have a blower with a 25hp motor attached. Last year nasira yung 25hp motor. Since it was an emergency, and we don't have a 25hp motor on hand, the technician replaced it with a 15hp motor. It operated as usual without noticeable drop in performance. Since then, we haven't replaced the motor.

Questions:
1. Could the supplied 25hp motor be too much for our application?
2. What could go wrong by replacing blower motors to a lower hp ones?

**StockEngine** · February 5th, 2015 01:55 PM

What application ?

**CVT** · February 5th, 2015 02:07 PM

Cooling?

Must be factor of safety bro......

"The measure of a man is what he does with power" LJIOHF!

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**1D4LV** · February 5th, 2015 02:23 PM

ano bang equipment?

**boybi** · February 5th, 2015 04:01 PM

It's a centrifugal air blower.

**Syuryuken** · February 5th, 2015 04:02 PM

Originally Posted by boybi

It's a centrifugal air blower.

yung ginagamit ng bakla pag naggugupit?

**dr. d** · February 5th, 2015 04:09 PM

Originally Posted by boybi

It's a centrifugal air blower.

what is the blower supposed to cool?
and in the time you have been using this supposedly temporary lower-rated motor, has the appliance to be cooled, overheated?
if not, then i suppose the lower rated motor can stay..

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Originally Posted by boybi

It's a centrifugal air blower.

what is the blower supposed to cool?
and in the time you have been using this supposedly temporary lower-rated motor, has the appliance to be cooled, overheated?
if not, then i suppose the lower rated motor can stay..

**12vdc** · February 5th, 2015 04:30 PM

1. Your system must be designed with such allowance or it is not operating at full capacity hence the demand for the blower is lower.

2.lower volume of air could affect system performance at full operating capacity. Overworked motor, less service life.

**Monty** · February 5th, 2015 04:54 PM

Originally Posted by boybi

We have a blower with a 25hp motor attached. Last year nasira yung 25hp motor. Since it was an emergency, and we don't have a 25hp motor on hand, the technician replaced it with a 15hp motor. It operated as usual without noticeable drop in performance. Since then, we haven't replaced the motor.

Questions:
1. Could the supplied 25hp motor be too much for our application?
2. What could go wrong by replacing blower motors to a lower hp ones?

Is it off the shelf or custom made? Like 12vdc said, it could be that the system was designed with an allowance; otherwise, you could be looking at an overworked motor.

**CVT** · February 5th, 2015 05:23 PM

Originally Posted by Monty

Is it off the shelf or custom made? Like 12vdc said, it could be that the system was designed with an allowance; otherwise, you could be looking at an overworked motor.

Yes, that is the Factor of Safety..... and should be true for any system design....

"The measure of a man is what he does with power" LJIOHF!

25.7K:shark: