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Is it possible to fabricate an Air Blower that produce high pressure air same as air compressor?

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Is it possible to fabricate an Air Blower that produce high pressure air same as air compressor?

Is it possible to fabricate an Air Blower that produce high pressure air same as air compressor?

Shaharudin07

(Mechanical)

(OP)

24 Aug 23 01:31

i have 1 unit air blower that sitting there doing nothing so i think i want to utilize it to replace our air compressor to do the house keeping and spraying air into boiler furnace ( solid fuel )when when fuel/wood chip is wet during rainy season using 1" hose

my question, can i make it by manipulating impeller fan blade design?

here is the spec of the air blower,
air inlet diameter = 395mm
air outlet rectangle flange = i want to change it to 1" so it can fit a hose

i'll attached some picture for reference

• https://files.engineering.com/getfile.aspx?folder=8be0-70f0-4b5c-a1b1-5

Is it possible to fabricate an Air Blower that produce high pressure air same as air compressor?i have 1 unit air blower that sitting there doing nothing so i think i want to utilize it to replace our air compressor to do the house keeping and spraying air into boiler furnace ( solid fuel )when when fuel/wood chip is wet during rainy season using 1" hosemy question, can i make it by manipulating impeller fan blade design?here is the spec of the air blower,air inlet diameter = 395mmair outlet rectangle flange = i want to change it to 1" so it can fit a hosei'll attached some picture for reference

RE: Is it possible to fabricate an Air Blower that produce high pressure air same as air compressor?

TugboatEng

(Marine/Ocean)

24 Aug 23 02:02

Simply put, pressure is a product of diameter and rotation speed. The engineering term is specific speed. Theoretically, if you can spin your impeller fast enough it will make high pressure. Practically, your impeller will detonate before it reaches those speeds.

You could stage compressors. If each one makes ~5 inH2O pressure, you could string together 5,500 blowers to produce 100 psi.

However, after many stages the sheet metal housing is going start being overstressed by the pressure.

RE: Is it possible to fabricate an Air Blower that produce high pressure air same as air compressor?

BrianPetersen

(Mechanical)

24 Aug 23 02:50

It is possible to manufacture "a" blower that has a pressure ratio sufficient to match that of a (low-pressure-ratio) positive displacement compressor ... just not *that* blower, which is designed to pump a large volume of air at a very low pressure ratio.

Your first step is to establish the pressure and volume of air delivery that you actually need.

RE: Is it possible to fabricate an Air Blower that produce high pressure air same as air compressor?

IRstuff

(Aerospace)

24 Aug 23 03:08

I wouldn't say it was impossible to get a part of your system to compress air, depending on whether your motor has sufficient horsepower.

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RE: Is it possible to fabricate an Air Blower that produce high pressure air same as air compressor?

2

LittleInch

(Petroleum)

24 Aug 23 07:59

"Is it possible to fabricate an Air Blower that produce high pressure air same as air compressor?" - Not the one you picture

"my question, can i make it by manipulating impeller fan blade design?" - Again not the one you show.

" replace our air compressor to do the house keeping " !! What sort of house keeping do you do with high pressure compressed air??

"praying air into boiler furnace ( solid fuel )when when fuel/wood chip is wet during rainy season using 1" hose" - that's illegal in many places as it produces huge quantities of small particles / smoke which impact other peoples lives. You need to dry the fuel BEFORE setting it alight.

Why is the fuel wet? Fix that problem first.

Oh and you haven't provided the "SPEC" of that rusty piece of crap, you've given us the size of the inlet and outlet. find the actual performance specification (Flow, pressure that sort of thing) and you'll probably see then how much air it blows at what very little pressure compared to your air compressor.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Is it possible to fabricate an Air Blower that produce high pressure air same as air compressor?

Artisi

(Mechanical)

24 Aug 23 09:36

No.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

RE: Is it possible to fabricate an Air Blower that produce high pressure air same as air compressor?

dvd

(Mechanical)

24 Aug 23 12:52

https://www.nyb.com/pdf/Catalog/Letters/EL-02.pdf

This sounds like an interesting project. It probably won&#;t succeed, but you will definitely learn some things.

Look at the fan laws to see what is possible with the current fan wheel diameter.This sounds like an interesting project. It probably won&#;t succeed, but you will definitely learn some things.

RE: Is it possible to fabricate an Air Blower that produce high pressure air same as air compressor?

Artisi

(Mechanical)

25 Aug 23 04:58

Blower and compressor, that should give you a bit of a clue to your question.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

RE: Is it possible to fabricate an Air Blower that produce high pressure air same as air compressor?

pierreick

(Chemical)

25 Aug 23 12:05
Probably good to keep for your study.
Pierre

• https://files.engineering.com/getfile.aspx?folder=b7cf-eae7-445f--1

Hi,Probably good to keep for your study.Pierre

RE: Is it possible to fabricate an Air Blower that produce high pressure air same as air compressor?

Joe591

(Mechanical)

8 Sep 23 11:23

you do get centrifugal compressors, but their construction is different. Usually with nozzles etc built into the fan casing etc etc etc.

that is a fan. i see now reason why you cant use it to blow air, like a giant garden vacuum...

i dont think its going to be easy to carry around though....maybe push it around on a trolley...

i dont think using it is going to be comfortable.

RE: Is it possible to fabricate an Air Blower that produce high pressure air same as air compressor?

rb

(Aerospace)

21 Sep 23 12:17

maybe set up drying racks for your wet fuel ?

What sort of velocity do you get out of this ? What if you cover up 1/2 of the outflow ?
Do you want velocity or a moving volume of air ? (probably more volume without messing with the outflow)

How efficient is that thing ? How much useful pressure for the work done by the motor ?

that'll it cost to run the motor to do this ?maybe set up drying racks for your wet fuel ?What sort of velocity do you get out of this ? What if you cover up 1/2 of the outflow ?Do you want velocity or a moving volume of air ? (probably more volume without messing with the outflow)How efficient is that thing ? How much useful pressure for the work done by the motor ?

"Hoffen wir mal, dass alles gut geht !"
General Paulus, Nov , outside Stalingrad after the launch of Operation Uranus.

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News

caw_86 said:

ive done some napkin engineering math, if you can take the squirrel cage blower off of the shaft and machine the shaft down from 5/16, down to a 1/4", and manage to reattach it balanced and centered, theoretically you should get about 20%ish more CFM. but i dont know the ratings of the motor and i cant find them anywhere, so i dont know what kind of extra current draw this will make

Click to expand...

For that type of motor (permanent magnet DC), the current draw is linear with delivered torque, being a minimum at no load (which you could measure with the blower removed) and maximum at stall (which is limited by the motor's DC resistance).

Torque is also linear, decreasing with increasing RPM, i.e., maximum at stall, minimum at no load - max RPM.

A graph, borrowed from a nameless source on the Internet, is below:

You must be registered for see images attach

The graph illustrates how the motor's torque increases linearly with decreasing speed. That's almost intuitive once you see it written down.

So:

You can measure the current draw presently, with the motor in the housing, using a DVM or DC current clamp. While you don't know, now, the torque delivered by the motor, you'll know the current, which is related to the torque. Read on...

You've estimated the change in airflow your changes will yield. You posted that, prior.

You can estimate how much, percentage-wise, the torque on the blower fan will increase with the increasing airflow (you decide on how you want to model that change as a function of airflow, e.g., linear, second-order, exponential...).

Finally, multiply the existing current draw by the percentage change in torque to yield an estimate of the resulting current draw after your changes.

For that type of motor (permanent magnet DC), the current draw is linear with delivered torque, being a minimum at no load (which you could measure with the blower removed) and maximum at stall (which is limited by the motor's DC resistance).Torque is also linear, decreasing with increasing RPM, i.e., maximum at stall, minimum at no load - max RPM.A graph, borrowed from a nameless source on the Internet, is below:The graph illustrates how the motor's torque increases linearly with decreasing speed. That's almost intuitive once you see it written down.So:You can measure the current draw presently, with the motor in the housing, using a DVM or DC current clamp. While you don't know, now, the torque delivered by the motor, you'll know the current, which is related to the torque. Read on...You've estimated the change in airflow your changes will yield. You posted that, prior.You can estimate how much, percentage-wise, the torque on the blower fan will increase with the increasing airflow (you decide on how you want to model that change as a function of airflow, e.g., linear, second-order, exponential...).Finally, multiply the existing current draw by the percentage change in torque to yield an estimate of the resulting current draw after your changes.

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