Cfd Modelling Of The Decompression Process Of Hydrogen Pipeline

1322 words - 6 pages

CFD simulate a wide range of compressible, laminar and turbulent, steady-state or transient flows of ideal or real fluids,
in multi-dimensional geometries

It is proposed that this study a deep understanding to the previous case study of full scale burst test of hydrogen gas pipeline in Japan. And develop a case study that has a similar boundary condition to full scale burst test of hydrogen gas pipeline. Then achieve model that will determine the change in decompression wave velocity when the gas undergoes a decompression process from vary high pressure to low pressure. That model will governed by control volume equation also applied momentum conservation, energy equation and equation of ...view middle of the document...

Furthermore, one of the major concerns in engineering design, construction and operating for gas pipeline is understand of the behaviour of gas pipeline material under crack initiation and fracture propagation prior to rupture. Because, in engineering design selection of material engineering design . Moreover, gas pipeline failure incident has a costly impact on assets replacement and revenue also losing time
Generally, hydrogen is transported in transmission pipeline under high pressure and it is really important to ensure the safety, reliability and integrity of the pipeline. Moreover, in the engineering design the material selection of gas pipeline should be based on the toughness and strength of the material that will be able to sufficiently arrest the propagation of any potential crack also resist and withstand internal stresses prior to any fracture.
According to Aihara et al they did a study that conducted a full scale burst test of hydrogen gas pipeline in Japan with two different pipes material (TMCP and TMR) the result shows that the crack arrest sooner with short propagation occurred in TMCP material. After examination of two both pipe materials the result shows that TMCP pipe material has better resistance then TMR and that is that reason that the crack arrest sooner with short propagation occurred (Aihara et al. 2010). Also that experiment supported by the present numerical simulation to the hydrogen decompression process shows same result. However it shows that the crack arrest sooner short propagation occurred with hydrogen then methane. Moreover, they state is that the reason is that “This is primarily due to the fact that hydrogen gas decompression is fast as compared with e.g. natural gas” (Aihara et al. 2010, p. 6)

Moreover, according to Phillips and Robinson “The determination of ductile shear fracture arrest toughness levels requires an accurate knowledge of the gas decompression behaviour following the rupture “(Phillips and Robinson. 2002, p.4). Furthermore if the decompression process could be model accurately for a specific gas as well as using the Battelle Two-Curve Model (BTCM) to determine the minimal material toughness required to arrest fracture using J curve (Leis and Brian, 2012, p.2).
Battelle Two-Curve Model (BTCM)
Battelle Two-Curve Model (BTCM) still used widely in industries since it has been developed in the 1970s. At earlier stage it used to predict the fracture control to natural gas and supercooled liquid pipeline. Then it has been simplified and used in ASME code of practices to predict the minimum tightness material required to arrest cracks and fracture propagation (Share, 2012, p.).

There are several of models that have been developed to evaluate a gas decompression wave speed. Nevertheless, one of the very popular model that has been develop in early 1970s is GASDECOM. Moreover, it still has proven that it has a range of validation to the operational conditions. It assumes a one-dimensional...

Find Another Essay On CFD modelling of the decompression process of Hydrogen pipeline

The Expansion of the Keystone Pipeline XL

2262 words - 9 pages as the light sweet crude that virtually any refinery can process," states Patrick DeHaan in his article. According to the paper "The Keystone XL Pipeline," two ways to get the tar sand out from the ground are by mining it or heating it. Mining can only reach 75 meters under the surface and then you have to separate the bitumen, which is the mixture of oil and sand, from other materials. When heating the tar sand, it can just be piped up

The Twinning Of Kinder Morgans Pipeline

918 words - 4 pages then burning fossil fuels. Problem being is it takes between 10 and 19 years to build a power plant (mark Z. Jacobson, 2013). With our understanding that the pipeline is safe, and there are safety precautions in place if anything ever did happen. That it is the best economical way to transport this oil. And finally our need for this oil s huge and it will be huge for a long time unless we start the process of building nuclear power right now

The Effects of Keystone XL Pipeline Project

1571 words - 7 pages This paper will discuss the effects of Keystone XL Pipeline project and how the findings of the research might be beneficial to the United States. The first point of argument will be the negative impact of the Keystone Pipeline to America’s economy and the environment. The second point of view will be the positive impact of Keystone Pipeline to America’s economy. Keystone XL Pipeline is TransCanada’s tar-sand transportation project. The pipeline

Hydrogen: the Fuel of the Future?

2121 words - 8 pages electrolyte (Proton exchange membrane), collect at the cathode and are then transferred to a capacitor to be stored for use (Motavalli, 2000). The positively charged hydrogen atoms pass through the electrolyte and then re-bond with the oxygen completing the reaction and creating water, heat, electricity and occasionally Carbon dioxide depending on the type of fuel cell (Edinger & Kaul, 2000). It is this process that many believe will power the

The Chemistry of the Hydrogen Bond

1727 words - 7 pages these forces are. These forces may then be split into two sub categories; London Dispersive forces and dipole-dipole interactions. Hydrogen Bonds – These bonds are a strong intermolecular forces, much greater than Van-Der-Waals and yet is relatively small in comparison to a chemical bond. A hydrogen bond can range from about 5-35 KJ/mol. ‘Clusters of Molecules are held together in specific orientations and often in well-defined numbers; the

Hydrogen: the fuel of the future

1197 words - 5 pages i was angry at the "socialized world" when i wrote this......it's kinda funny now... he really liked it. he said it showed "original thoughts and opinions" .....i was just venting.....HYDROGEN: THE FUEL OF THEFUTUREBy: JsonWhy are we as Americans so afraid to change? even if it is a change for the better? theworld has been using oil coal and other petroleum products to power just about everythingthat moves for the last 150 years. yet most cars

The Important Role of Hydrogen Bonds

930 words - 4 pages The Important Role of Hydrogen BondsHydrogen bonds are pretty much everywhere you go. You can't see them with the naked eye, but they have an important role in several biological structures that help sustain the life we know. In this paper I will define the hydrogen bond and explain the important role it has with the structure of DNA, the shape of proteins in the secondary and tertiary levels of protein structure, the unique properties of water

The catalytic decomposition of Hydrogen peroxide

3159 words - 13 pages Factors affecting the catalytic decomposition of Hydrogen peroxidePlease refer to the additional files for tables/graphs.Aim- The purpose of this investigation is to investigate how certain factors affect the catalytic decomposition of Hydrogen peroxide. I will investigate the effect of altering the mass of catalyst used on the rate of the decomposition of Hydrogen peroxide.Introduction-The decomposition of Hydrogen peroxide is a process by

Oxides of Hydrogen

1137 words - 5 pages Oxides of Hydrogen Introduction: Hydrogen atoms can react with oxygen atoms forming different compounds. There are mainly two types, one is water and the other is hydrogen peroxide. Structure: A water molecule is made up of two hydrogen atoms and one oxygen atom joining together by covalent bonds. The shape of it is bent and its bond angle is of 105°. The structure is shown below. [IMAGE] A

Mathematical Modelling of a Can

842 words - 3 pages Mathematical Modelling: Can of Drink1.)Consider a drink can of capacity 330ml. Draw a diagram, or a number of diagrams which show all the features of the can.Height: 11.5 cmRadius: 3.25 cmDiameter (top): 5.42 cmDiameter (middle): 6.5 cmDiameter (bottom): 5 cmCapacity: 330mlVcan: 330 cm"2.)Use your diagrams of part 1 to help you choose a simple three dimensional shape which models this can and define suitable variables for this shape.- I have

Modelling the mass of banana fruit by geometrical attributes

1595 words - 6 pages Horticulturae, 114 (1),21-26. [10] Lee, D.-J., Xu, X., Eifert, J., Zhan, P. 2006. Area and volume measurements of objects with irregular shapes using multiple silhouettes. Optical Engineering, 45 (2),027202-027202-027211. [11] Lorestani, A. N., Tabatabaeefar, A. 2006. Modelling the mass of kiwi fruit by geometrical attributes. International Agrophysics, 20 (2),135. [12] Mohsenin, N. N. 1986. Physical properties of plant and animal materials. New

Similar Essays

The Element Of Hydrogen Essay

868 words - 4 pages In chemistry there are a lot of elements on the periodic table. One of the elements is hydrogen. Hydrogen the first element in the periodic table it is colorless, combustible and lightest of all gases. It was first artificially produced in the early 16th century by Henry Cavendish. As we know hydrogen can be used as fuel, and the fossil fuel energy has been used in many areas, but human can’t produce the fossil energy fuel by themselves, the

Analysis Of The Hydrogen Atom

700 words - 3 pages that can be transported easily, and its heating and power generator that could be token to places, where it is difficult use or have electricity. Because Hydrogen cannot be found on Earth it needs to be manufactured or produced. There are several ways to produce Hydrogen, and make energy for our daily use. The most effective way we manufacture Hydrogen today, is through the process of Steam Reforming. Steam Reforming is done when high pressured

The Benefits Of Hydrogen Cars Essay

688 words - 3 pages country by creating hydrogen plants and buying hydrogen cars and not be dependent on foreign oil.      Hydrogen is also better for the environment. Hydrogen is good because its only byproduct in water coming out of the exhaust pipe, unlike oil which’s byproduct is CO2, a chemical that is very harmful. Hydrogen is made through a process called electrolysis. This process just separates the molecules. Hydrogen is the most abundant element in the

Modelling The Finances Of A Business

3435 words - 14 pages additional costs are calculated such as taxes and rates to the council. This is taken away from the total gross profit made in the year. The financing process takes up a whole day and means that stock and company progress cannot be looked at in the middle of the month.The tasks of calculating the finances is upon the owner, he doesn't leave it for his employees or hire an accountant.Interview with the Owner of the businessHow long has this