Transient flow in pipelines of high-pressure hydrogen–natural gas mixtures

In high-pressure hydrogen systems, the check valve is one of the most easy-to-damage components. Generally, the high-pressure hydrogen flow can generate a strong impact on the check valve, which can cause damage and failure. Therefore, it is useful to study the transient flow characteristics of the high-pressure hydrogen flow in check valves. Using dynamic mesh generation and the National Institute of Standards and Technology (NIST) real hydrogen gas model, a transient-flow model of the high-pressure hydrogen for the check valve is established. First, the flow properties of high-pressure hydrogen during the opening process is investigated, and velocity changes and pressure distribution of hydrogen gas flow are studied. In addition, the fluid force, acceleration, and velocity of the valve spool are analyzed quantitatively. Subsequently, the effect of the hydrogen inlet-pressure on the movement characteristic of the valve spool is investigated. The results of this study can improve both the design and applications of check valves in high-pressure hydrogen systems.

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Effects of stress concentration on the mechanical properties of X70 in high-pressure hydrogen-containing gas mixtures

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2020.02.125 ◽

2020 ◽

Vol 45 (52) ◽

pp. 28204-28215 ◽

Cited By ~ 1

Author(s):

Juan Shang ◽

Jinyang Zheng ◽

Zhengli Hua ◽

Yanhua Li ◽

Chaohua Gu ◽

...

Keyword(s):

Mechanical Properties ◽

High Pressure ◽

Stress Concentration ◽

Gas Mixtures ◽

Effects Of Stress ◽

Pressure Hydrogen

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Density Of High Pressure And Temperature Gas Reservoirs: Effect Of Non-Hydrocarbon Contaminants On Density Of Natural Gas Mixtures

10.2118/133595-ms ◽

2010 ◽

Cited By ~ 1

Author(s):

Farshad Tabasinejad ◽

Robert Gordon Moore ◽

Sudarshan A. Mehta ◽

Kees Cornelius Van Fraassen ◽

Yalda Barzin ◽

...

Keyword(s):

High Pressure ◽

Natural Gas ◽

Gas Mixtures ◽

Gas Reservoirs ◽

High Pressure And Temperature

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Shock-induced ignition and pyrolysis of high-pressure methane and natural gas mixtures

Combustion and Flame ◽

10.1016/j.combustflame.2020.08.010 ◽

2020 ◽

Vol 221 ◽

pp. 364-370

Author(s):

Jiankun Shao ◽

Alison M. Ferris ◽

Rishav Choudhary ◽

Séan J. Cassady ◽

David F. Davidson ◽

...

Keyword(s):

High Pressure ◽

Natural Gas ◽

Gas Mixtures ◽

Induced Ignition

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Reduced-order modellin for high-pressure transient flow of hydrogen-natural gas mixture

The European Physical Journal Plus ◽

10.1140/epjp/i2017-11435-7 ◽

2017 ◽

Vol 132 (5) ◽

Cited By ~ 1

Author(s):

Baba G. Agaie ◽

Ilyas Khan ◽

Ali Saleh Alshomrani ◽

Aisha M. Alqahtani

Keyword(s):

High Pressure ◽

Natural Gas ◽

Transient Flow ◽

Gas Mixture ◽

Pressure Transient ◽

Reduced Order

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Measurement of Decompression Wave Speed in Rich Gas Mixtures at High Pressures (370 bars) Using a Specialized Rupture Tube

Journal of Pressure Vessel Technology ◽

10.1115/1.4001438 ◽

2010 ◽

Vol 132 (5) ◽

Cited By ~ 12

Author(s):

K. K. Botros ◽

J. Geerligs ◽

R. J. Eiber

Keyword(s):

High Pressure ◽

Natural Gas ◽

Wave Speed ◽

High Pressures ◽

Equations Of State ◽

Gas Mixtures ◽

Internal Diameter ◽

Decompression Wave ◽

Predicted Values ◽

Fracture Arrest

Measurements of decompression wave speed in conventional and rich natural gas mixtures following rupture of a high-pressure pipe have been conducted. A high-pressure stainless steel rupture tube (internal diameter=38.1 mm and 42 m long) has been constructed and instrumented with 16 high frequency-response pressure transducers mounted very close to the rupture end and along the length of the tube to capture the pressure-time traces of the decompression wave. Tests were conducted for initial pressures of 33–37 MPa-a and a temperature range of 21–68°C. The experimentally determined decompression wave speeds were compared with both GASDECOM and PIPEDECOM predictions with and without nonequilibrium condensation delays at phase crossing. The interception points of the isentropes representing the decompression process with the corresponding phase envelope of each mixture were correlated with the respective plateaus observed in the decompression wave speed profiles. Additionally, speeds of sound in the undisturbed gas mixtures at the initial pressures and temperatures were compared with predictions by five equations of state, namely, BWRS, AGA-8, Peng–Robinson, Soave–Redlich–Kwong, and Groupe Européen de Recherches Gaziéres. The measured gas decompression curves were used to predict the fracture arrest toughness needed to assure fracture control in natural gas pipelines. The rupture tube test results have shown that the Charpy fracture arrest values predicted using GASEDCOM are within +7% (conservative) and −11% (nonconservative) of the rupture tube predicted values. Similarly, PIPEDECOM with no temperature delay provides fracture arrest values that are within +13% and −20% of the rupture tube predicted values, while PIPEDECOM with a 1°C temperature delay provides fracture arrest values that are within 0% and −20% of the rupture tube predicted values. Ideally, it would be better if the predicted values by the equations of state were above the rupture tube predicted values to make the predictions conservative but that was not always the case.

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