Orifice plate pressure loss ratio: theoretical work in compressible flow and experimental work in CO2

M J Reader-Harris, J Barnett, K Mistry

Abstract

An 8” (200 mm) nominal diameter orifice plate assembly with a nominal diameter ratio, β, of 0.4 was tested in gaseous phase carbon dioxide (CO2). The assembly had been calibrated in water using the TUV SUD NEL water flow test facilities at East Kilbride in Scotland. The orifice plate assembly incorporated flange tappings, with additional downstream tappings used for measurement of pressure loss ratio.<BR />The test loop was filled with nitrogen, evacuated and then filled with CO2 up to a pressure of 20 barg giving an estimated composition of 99.6% CO2 by mol. Testing was carried out at 20 barg and 15 barg with additional test points at 12 barg.<BR />Data on pressure loss ratio was collected from the orifice plate.<BR />A correlation for pressure loss ratio in gas based on theory has been obtained, which deviates from the experimental data by only 0.0008, but further work with different orifice plate diameter ratios, pipe sizes and gases is required to prove the correlation.

Download

IMEKO-TC9-2019-017.pdf

DOI

-

IMEKO TC

TC9 - Flow Measurement

Back to the proceedings