Compressed Air Receiver
Compressed Air Receiver
(OP)
I have a 1000 gallon air receiver charged at 150 psi.
If I lose 100 gallon air due to consumption, what will be the resulting air pressure in the tank?
I want to know the pressure drop relationship between fixed receiver tank size with initial pressure and resulting pressure due to air withdrawal.
If I lose 100 gallon air due to consumption, what will be the resulting air pressure in the tank?
I want to know the pressure drop relationship between fixed receiver tank size with initial pressure and resulting pressure due to air withdrawal.





RE: Compressed Air Receiver
Temperature, Rgas, and volume are constant so P1/m1=P2/m2
Pretty easy if you knew if the "100 gallon" (13.37 ft3) of air you "lost" was stated at standard conditions or at actual conditions. If it is standard then the problem is trivial (just figure out how many SCF is in the 1000 gallon tank at 150 psig and the lost volume is 10%). If it is actual then you need to iterate since some of the lost volume was lost at each pressure between 150 psig and final pressure.
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.
The plural of anecdote is not "data"
RE: Compressed Air Receiver
RE: Compressed Air Receiver
If the lost 100 gallons was volume at actual conditions then the problem is impossibly difficult and the best you'll be able to do is to iterate until you get a close enough approximation.
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.
The plural of anecdote is not "data"
RE: Compressed Air Receiver
Thanks.
RE: Compressed Air Receiver
If the air withdrawal is relativey fast, you can use an isentropic process. Is slow, use isothermal.
Regards
Sailoday28
RE: Compressed Air Receiver
In real life you would never know that you had "lost 100 gallons" of air. You would have a new pressure and calculate the new mass.
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.
The plural of anecdote is not "data"