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2 edition of Structural mechanics simulations associated with underground coal gasification found in the catalog.

Structural mechanics simulations associated with underground coal gasification

Yang-Tai Thomas Lin

Structural mechanics simulations associated with underground coal gasification

by Yang-Tai Thomas Lin

  • 24 Want to read
  • 21 Currently reading

Published by Dept. of Energy, [Office of the Assistant Secretary for Intergovernmental and Institutional Relations], Technical Information Center, for sale by the National Technical Information Service in [Oak Ridge, Tenn.], Springfield, Va .
Written in English

    Subjects:
  • Rock mechanics -- Mathematical models.,
  • Coal gasification, Underground.

  • Edition Notes

    StatementYang-Tai Thomas Lin.
    SeriesMERC/CR ; 78/4
    ContributionsUnited States. Dept. of Energy. Technical Information Center.
    The Physical Object
    Paginationxx, 250 p. :
    Number of Pages250
    ID Numbers
    Open LibraryOL17648474M

    Underground coal gasification produces syngas with low capital and low operating cost Gasification occurs in situ. The technology is well tested >40 years Environmental benefits • No mining • Much less pollution (no SO x, NO x; less mercury, particulates) • Low-cost H 2 production Economic benefits • No gasifier purchase, operation. Developments in modelling and simulation of coal gasification 7 Though there are many different gasification reactors, each with their own design and operating characteristics, all are based on one of three generic types, namely moving bed (sometimes known as fixed bed), fluidised bed and entrained flow reactors.

      Underground coal gasification (UCG) is an important technique for future coal utilization. It has the potential to be a clean technology and to tap un-mineable, deep coal deposits across the world. Commercialization of UCG has been riddled with a variety of issues, including public perception and a lack of clear comprehension about underlying. Linear thermoelastic analyses of structural models associated with underground coal gasification (UCG) are conducted in this dissertation. Idealized crack and cavity configurations simulating the Longwall Generator concept and linked vertical wells concept of UCG are studied by deriving closed form solutions.

    the importance of coal as an energy source, considering that only 15 to 20% of the known coal resources are suitable for conventional raw material extraction through surface and underground mining [1]. Underground coal gasification (UCG), a method of gasifying coal in-situ and converting it to syngas, may offer a cost-competitive and sustainable. Computational Simulation of Coal Gasification in Fluidized Bed Reactors Ryan Michael Soncini ABSTRACT The gasification of carbonaceous fuel materials offers significant potential for the production of both energy and chemical products. Advancement of gasification technologies may .


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Structural mechanics simulations associated with underground coal gasification by Yang-Tai Thomas Lin Download PDF EPUB FB2

Get this from a library. Structural mechanics simulations associated with underground coal gasification. [Yang-Tai Thomas Lin]. Get this from a library. Structural mechanics simulations associated with underground coal gasification. [Sunder H Advani; Y T Lin; United States.

Energy Research and Development Administration.; Morgantown Energy Research Center.; West Virginia University. Department of Mechanical Engineering and Mechanics.]. Peer reviewed only Published between: Published from year: and Published to year.

Underground Coal Gasification (UCG) is carried out in unmined coal seams, using wells drilled from the surface and converting coal into synthesis gas. The gas can be used for power generation and synthesis of automotive fuels, fertilizers and other products.

Other coal gasification technologies that use surface reactors for gasification include an. entrained flow, a fluidised bed, and a moving bed. The main differences among these methods.

are in a gas flow configuration, a coal particle size, ash handling, and process conditions. cation channel with the given geometry. Simulations of phys-ical phenomena are related to the transport of mass and ener-gy and chemical reactions (including the effect of energy).

The Probabilistic Density Function (PDF) method was used to model the chemical reactions of the coal gasification Size: 1MB.

The determination of operational parameters in the underground coal gasification (UCG) process should be considered in two aspects: first, the total coal in. Simulation Study of Underground Coal Gasification in Alberta Reservoirs: Geological Structure and Process Modeling Hossein Nourozieh, Mohammad Kariznovi, Zhangxin Chen, and Jalal Abedi* Department of Chemical and Petroleum Engineering, University of Calgary, University Drive, Northwest, Calgary, Alberta T2N 1N4, Canada Received November During the ignition period, the elements in the coal seam emit energy according the calorific value of the coal.

( MJ/m3, Q = C + (H - O/8) + 93S,) 3. The energy emission is represented by using a decay function as the energy emission due the coal burning reduces gradually with time.

The movement of the coal burning head is set at. Therefore, turbulence models play an important role in coal combustion and gasification simulation, and it affects not only the flow field inside the gasifier but also the coal conversion rate of gasification.

Launder & Spalding developed the k-ε model inand it has since been widely used due to its simple physics and robust feature. 2-D Modeling of Underground Coal Gasification (UCG) UCG is a process which converts coal to syn gas at the underground coal seam itself.

UCG can help meeting the rising energy demand by utilizing coal resources that otherwise would be too deep, or of poor quality, or simply not economical to mine. [2] Aghalayam, P., “Underground Coal Gasification: A Clean Coal Technology” in Handbook on Combustion, Wiley-VCH books [3] Park, K.

and Edgar, T. F., “Modeling of Early Cavity Growth for Underground Coal Gasification”. In this project, a semi-commercial scale underground coal gasification experiment using the shaft method was realised in a coal seam at a depth of 30 m.

The in situ UCG experiment was preceded by laboratory and ex situ tests [22], [23], [24], [25].Cited by: Underground Coal Gasification is the gasification of coal in-situ, which is achieved by drilling boreholes into the coal by simulations carried out to model the process.

The control Thereby sufficient structural support is created both via the rock between the modules and by the under burden and overburden, similar to a large extent as. • Eliminates conventional coal mining, reducing operating costs, surface damage, eliminating mining safety problems.

• Accesses otherwise un-mineable coals (deep or thin seams), increasing exploitable reserves. • Needs no surface gasification facilities, reducing capital costs.

• Leaves gasification residuals Size: 1MB. Geomechanical simulations can provide the opportunity to predict the response of the coal seam and the surrounding formation to coal gasification and allows investigating caprock and bedrock integrity at different timesteps and under different operational conditions.

To date, limited geomechanical simulations of. Reverse combustion linking (RCL) is a viable and effective linking method for underground coal gasification (UCG). A modelling tool was employed here to explore the theory of reverse combustion in porous media. Grid refinement was also Cited by: 8.

Thermal-Mechanical Modelling around the Cavities of Underground Coal Gasification Dongmin Yang1,*, Vasilis Sarhosis1,*, Yong Sheng2,# 1 Research Fellow, Institute for Resilient Infrastructure, School of Civil Engineering, University of Leeds, UK, @, [email protected] 2 Associate Professor, Institute for Resilient Infrastructure, School of.

Underground coal gasification (UCG) is an emerging energy technology for a cleaner type of coal extraction method. It avoids current coal mining challenges such as drastic changes to landscapes, high machinery costs, elevated risks to personnel, and post-extraction transport.

UCG has a huge potential to provide a clean coal energy source by implementing Cited by: 4. Exact values for the temperature distribution in the overlying strata during the process of underground coal gasification are obtained from the numerical simulation.

the challenges and benefits of coal gasification process aUtoMation T he United States has enough coal to provide energy for the next years with a recoverable reserve base of nearly billion tons.

With oil prices continuously rising and unrest in the Middle East, utilizing our coal reserves seems a likely option for the United Size: 1MB.Roadmap of presentation 1. Gasification Technology overview (the science is the same)2. FACTSAGETM Equilibrium Simulation (what it is?) 3.

Background of Theunissen UCG Project (Mr. J Brand in plenary)• UCG cavity • Coal deposit and coal properties • Gasification conditions as input for simulations 4.

Mineral matter slag formation (complete simulations).Underground coal gasification (UCG) is a method whereby the mining and conversion of coal are accomplished in a single step.

Many field tests of UCG have been operated worldwide since the 's with varying degrees of success; based on this experience (especially in the USSR and United States), a field design which is applicable to a wide range of geological conditions and coal .