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!

25.7K:shark:

**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..

**CVT** · February 5th, 2015 04:23 PM

Both motors driving the blades have the same speed, right?

If so,- then airflow (cum/sec) is not affected.

So, cooling effect is not compromised.

Unless the 15HP motor is showing unnecessary grind in driving the blades,- then you're okay.

Disclaimer: Gin-gineer po pero hindi Mechanical....

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

25.7K:shark:

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**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.

**kimbon** · February 5th, 2015 04:34 PM

Originally Posted by CVT

Both motors driving the blades have the same speed, right?

If so,- then airflow (cum/sec) is not affected.

So, cooling effect is not compromised.

Unless the 15HP motor is showing unnecessary grind in driving the blades,- then you're okay.

Disclaimer: Gin-gineer po pero hindi Mechanical....

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

25.7K:shark:

[/COLOR]

+1 here. ang laki ng saving sa electricity nyan. biruin mo a difference of 10HP is like switching off roughly 10 unit window a/c of 1hp each? LOL

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Originally Posted by CVT

Both motors driving the blades have the same speed, right?

If so,- then airflow (cum/sec) is not affected.

So, cooling effect is not compromised.

Unless the 15HP motor is showing unnecessary grind in driving the blades,- then you're okay.

Disclaimer: Gin-gineer po pero hindi Mechanical....

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

25.7K:shark:

[/COLOR]

+1 here. ang laki ng saving sa electricity nyan. biruin mo a difference of 10HP is like switching off roughly 10 unit window a/c of 1hp each? LOL