Impact of the gas mass flow rate on orifice measurements accuracy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F19%3A10243575" target="_blank" >RIV/61989100:27360/19:10243575 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Impact of the gas mass flow rate on orifice measurements accuracy

Popis výsledku v původním jazyce

The present article analyses the causes of systematic errors in measurements of the quantity of natural gas that result from the changes in the differential pressure at the orifice meter with flange tapping. The analysed orifices had the internal diameter of 412.45 mm and the thicknesses of 12.2 mm or 13 mm. Numerical calculations of the orifice deformation indicated that at the differential pressure of 60 kPa the force affecting the orifice exceeds 15 kN. As a result of the force effect, the central axis of the orifice 12.2 mm thick was shifted in 2.012 mm in the axial direction and the internal diameter of the bore decreased in 0.115 mm. At the differential pressure of 45 kPa, a negative deviation of 12,973 m3.day-1 occurs in the measurement of the mass flow rate (at 20 oC and 101.325 kPa). This error is approximately 5.6-times higher than at the differential pressure of 8 kPa. The gas flow rate should be thus measured on a larger amount of parallel lines, with a smaller pressure drop across the orifice

Název v anglickém jazyce

Impact of the gas mass flow rate on orifice measurements accuracy

Popis výsledku anglicky

The present article analyses the causes of systematic errors in measurements of the quantity of natural gas that result from the changes in the differential pressure at the orifice meter with flange tapping. The analysed orifices had the internal diameter of 412.45 mm and the thicknesses of 12.2 mm or 13 mm. Numerical calculations of the orifice deformation indicated that at the differential pressure of 60 kPa the force affecting the orifice exceeds 15 kN. As a result of the force effect, the central axis of the orifice 12.2 mm thick was shifted in 2.012 mm in the axial direction and the internal diameter of the bore decreased in 0.115 mm. At the differential pressure of 45 kPa, a negative deviation of 12,973 m3.day-1 occurs in the measurement of the mass flow rate (at 20 oC and 101.325 kPa). This error is approximately 5.6-times higher than at the differential pressure of 8 kPa. The gas flow rate should be thus measured on a larger amount of parallel lines, with a smaller pressure drop across the orifice

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20500 - Materials engineering

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

AIP Conference Proceedings. Volume 2118

ISBN

978-0-7354-1858-5

ISSN

0094-243X

e-ISSN

1551-7616

Počet stran výsledku

5

Strana od-do

1-5

Název nakladatele

American Institute of Physics

Místo vydání

Melville

Místo konání akce

Liptovský Mikuláš

Datum konání akce

19. 6. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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