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|Title:||The Positive Displacement Method for Calibration of Gas Flow Meters. The Influence of Gas Compressibility|
|Abstract:||An easy technique to calibrate small gas flow meters is the positive displacement method, whoseapplication requires a simple setup and laboratory procedure. With this methodology there is anunknown gas flow coming from a given gas source that must be known by the action of a gas flow meter.The gas flow to be measured is sent to a reservoir with rigid walls and full of water. As gas enters thereservoir water flows out and the amount of water exiting the reservoir in a given time interval can beconnected with the average gas flow in that same time interval. In simple terms the volume flow rate ofwater leaving the reservoir is equal to the gas volume flow rate entering it. The water being incompressible, the density variation is meaningless, however the same cannot be assumed for the gas.Considerations on the simple techniques to be used to minimize the importance of gas compressibilityare presented in the paper.|
|Document Type:||Artigo em Revista Científica Internacional|
|Appears in Collections:||FEUP - Artigo em Revista Científica Internacional|
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