compressed-air-system

Question Title: compressed-air-system
Asked by: Jenifer
Asked On:
Answers: 1

In our Factory we have a Compressor which rates 660 CFM (Kirloskar Make), which is a VFD Compressor. And next to compressor, we have a Receiver tank. Next to Receiver Tank, we have a Dryer. The Consumption of the Total Plant is around 350-400 CFM. The Flow in the Dryer Outlet was around 400-450 CFM, whereas the flow is uniform for 4 to 5 min. Then the flow drops down to 50-70 CFM and remains in that for 40 Secs. But still all the machines were in the same running State. And after 40 secs, the Flow in the Dryer Outlet was about 400 to 450 CFM. Why this kind of low CFM is happening in the Dryer Outlet?

Answers & Replies

Cas

5 years ago

Hi,

So I understand that air consumption suddenly drops from 400-450 to around 50-70 CFM for about 40 seconds, without something really happening in your plant.

You said you are measuring this at the dryer outlet, which is the best location to measure the air usage of your factory, so I assume your readings are correct.

What happens to the air pressure and your air compressor during these dips? Does the pressure increase? Does the compressor go down in rpm or stop?

Please check that first. If there is no noticeable difference in pressure or compressor rpm, it would seem like air demand is constant and there is something wrong with your flowmeter.

If the pressure does go up, and the compressor does go down in rpm or shut down (because of less air demand), then there must really be a sudden dip in air demand.

Try to find out what machine, or machine is causing this. Does it happen often? The machines could still be running but simple not use compressed air all the time.

If two or three big machines have these consumption dips every so many minutes, then sometimes, they might fall together to create 1 big dip.

Hard to say from here :)

Hope this helps! Let me know if you find out what it is, I'm curious.

All the best,
Cas