btrueblood - the flow meter is open constantly at 360 SCFH. The pressure is regulated to it at 50 psig. The tank swings 1 psi up when the valve opens and 1 psi down when the valve closes. The nitrogen gas from the process delivers more than the tank is flowing on its output.
I've attached a...
That's the right link. The Dwyer flow meters use a needle valve on the incoming gas before it goes to the ball float. I have checked them against another meter we have here that uses Constant Temperature Differential technology in order to measure the flow rate and they are within stated accuracy.
btrueblood - Well, I didn't find Jimmy Hoffa, but I think you are correct that I can't assume adiabatic conditions. I checked the results and saw that a slight temperature difference could change the results closer to what I'm reading on the meter. Thanks.
rb1957 - I showed my calculation to see if someone could find an error with it. I've checked it multiple times.
dvd - I've confirmed constant temperature at the flowmeter. Would a slight temperature difference cause a 48% difference in results?
vpl - I'm not sure what you mean by full. Are...
dhengr - The tank is standing verically
dvd - The flowmeter is a Dwyer variable area flowmeter with the exhaust open to atmosphere
http://www.dwyer-inst.com/Product/Flow/Flowmeters/VariableArea/SeriesRM-RMA-RMB-RMC-
We are using the RMC type with a scale reading from 40 to 400 SCFH. We...
I originally suspected the tank size might be off and I did change the tank size based on the U1A form and measurements of the tank. However, the tank size is listed as 400 gallons and we adjusted it to 375 gallons. In order for the calculation to match up the tank would have to be...
No, this is not a school experiment.
The concern is that we are testing a method for our systems as a way to check flow, but our experimental results are not matching up.
The temperature is 68 F, which is close to the standard temperature of 70 F used in our instrumentation.
Our flow meter...
I have an experiment set up where I am measuring the flow rate from a 375 gallon tank (50.13 ft3). I am trying to calculate the flow rate from the tank, but my results are not matching up. The flow meter I have on the tank is measuring 360 SCFH (6 SCFM).
The tank is being filled with...
