Air receiver pressure and volume

[MSR9841]

There are two tanks (air receiver and clutch). The Clutch has capacity of 10 gallon. The initial set pressure of the clutch is 0 PSI and is to be achived 110 PSI withinn 6 seconds. Air receiver is another tank which fills the air in clutch. The air receiver is being filled by a compressor.

Now I need to calculate the air receiver pressure and volume; may be compressor capacity also.

It would be very helpful to me if anyone helps me to guide to start this task. I need guidlines and topics to be referred. I am not aware of variable flow compressed air calculations.

I am very grateful, if someone helps me as soon as possible.

Srinivasa Rao

 

[BigInch]

Why only six seconds?

If it ain't broke, don't fix it. If it's not safe ... make it that way.

 

[MSR9841]

It is our client requirement.

Srinivasa Rao Majji

 

[zdas04]

The time is so short, that I would treat it as though the clutch was always at 110 psig (it is really bad form to use the term "psi" when talking abut technical issues, either use psig or psia). I would also assume that the receiver was big enough that when you remove 11.3 SCF it would not lower its pressure by more than 10%. Then I would look at a pipe size and a receiver pressure that could flow 2 SCF/sec from the receiver pressure to the sink pressure.

With 1-inch pipe, 20 ft long you would need the receiver at about 125 psig (assuming that the ending pressure is 90% of starting pressure) and still have enough pressure for a 2 psid friction drop into 110 psig. Velocity is around 50 ft/sec.

I'll leave it to you to determine what size vessel can start at 125 psig, lose 11.3 SCF and end up at 112 psig.



David Simpson, PE
MuleShoe Engineering

"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.

 

[MSR9841]

Thank you for your reply.