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natural-gas-pipeline
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A parametric study on the effects of surface explosions on buried high pressure gas pipelines
, Article Engineering Solid Mechanics ; Volume 5, Issue 4 , 2017 , Pages 225-244 ; 22918744 (ISSN) ; Azadi, A ; Farhanieh, B ; Afshin, H ; Sharif University of Technology
Growing Science
2017
Abstract
Underground gas pipelines are one of the vital parts of each country which surface blasts can break down such pipelines, making destructive explosions and threatening the safety of neighborhood structures and people. In this paper, to enhance the safety of these lines, response of a buried 56-inch diameter high pressure natural gas pipeline to a surface blast was numerically investigated. Besides, the effects of: i) explosive mass, ii) pipeline thickness, iii) burial depth and iv) concrete protective layer on pipeline deformation were parametrically studied. To simulate the problem according to actual explosion events, geometries were modeled in real scales, pipeline properties were...
Integrated Planning of Electrical and Natural Gas Distribution System for Enhancing the Resilience after Occurrence of Earthquake
, M.Sc. Thesis Sharif University of Technology ; Eshraghniaye Jahromi, Abdolhamid (Supervisor)
Abstract
The ever-growing prevalence of gas-fired power plants has paved the way for significant changes in the electrical energy network applications in recent years. As a result, the mutual dependency between natural gas distribution systems and electrical energy distribution systems has been intensified. Thus, the integrated gas and electrical distribution system is faced with notable threats from natural disasters that can lead to disruptions in meeting the critical demands of the consumers as well as high monetary costs. The occurrence of unpredicted natural disasters such as floods, earthquakes, and hurricanes affects the performance of energy infrastructures. Given the low possibility of these...
A strategic planning model for natural gas transmission networks
, Article Energy Policy ; Volume 35, Issue 11 , 2007 , Pages 5656-5670 ; 03014215 (ISSN) ; Hemmati, M. R ; Sharif University of Technology
2007
Abstract
The design and development of natural gas transmission pipeline networks are multidisciplinary problems that require various engineering knowledge. In this problem, the type, location, and installation schedule of major physical components of a network including pipelines and compressor stations are decided upon over a planning horizon with least cost goal and subject to network constraints. Practically, this problem has been viewed as a conceptual design case and not as an optimization problem that tries to select the best design option among a set of possible solutions. Consequently, conceptual design approaches are usually suboptimal and work only for short-run development planning. We...
Dynamic simulation of natural gas transmission pipeline systems through autoregressive neural networks
, Article Industrial and Engineering Chemistry Research ; Volume 60, Issue 27 , 2021 , Pages 9851-9859 ; 08885885 (ISSN) ; Bozorgmehry Boozarjomehry, R ; Sahlodin, A. M ; Sin, G ; Mansouri, S. S ; Sharif University of Technology
American Chemical Society
2021
Abstract
Transmission of natural gas from its sources to end users in various geographical locations is carried out mostly by natural gas transmission pipeline networks (NGTNs). Effective design and operation of NGTNs requires insights into their steady-state and, particularly, dynamic behavior. This, in turn, calls for efficient computer-aided approaches furnished with accurate mathematical models. The conventional mathematical methods for the dynamic simulation of NGTNs are computationally intensive. In this paper, the use of autoregressive neural networks for cost-effective dynamic simulation of NGTNs is proposed. Considering the length, diameter, roughness, and elevation as the main...
Investigation of carrier demand response uncertainty on energy flow of renewable-based integrated electricity-gas-heat systems
, Article IEEE Transactions on Industrial Informatics ; Volume 14, Issue 11 , 2018 , Pages 5133-5142 ; 15513203 (ISSN) ; Niknam, T ; Fotuhi Firuzabad, M ; Sharif University of Technology
Abstract
Since there are heavy interdependencies among the electrical, heat, and gas systems to supply various load types worldwide, operation of multi-energy carrier (MEC) systems faces critical challenges. Moreover, any uncertainty rising in one carrier would directly influence the energy flow and the secure operation of the whole MEC system. This issue intensifies when an MEC system is integrated with industrial energy carrier demand response (ECDR) consumers and renewable energy sources (RESs). Large industrial ECDR consumers can increase the system uncertainty by randomly participating in the demand response programs and utilizing various carriers. Accordingly, this paper presents a powerful...
Security-constrained unit commitment with natural gas pipeline transient constraints
, Article IEEE Transactions on Smart Grid ; Volume 11, Issue 1 , 2020 , Pages 118-128 ; Ehsan, M ; Shahidehpour, M ; Hajibandeh, N ; Shafie Khah, M ; Catalao, J. P. S ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2020
Abstract
The interdependencies of power systems and natural gas networks have increased due to the additional installations of more environmental-friendly and fast-ramping natural gas power plants. The natural gas transmission network constraints and the use of natural gas for other types of loads can affect the delivery of natural gas to generation units. These interdependencies will affect the power system security and economics in day-ahead and real-time operations. Hence, it is imperative to analyze the impact of natural gas network constraints on the security-constrained unit commitment (SCUC) problem. In particular, it is important to include natural gas and electricity network transients in...
Numerical modeling of transient turbulent gas flow in a pipe following a rupture
, Article Scientia Iranica ; Volume 17, Issue 2 B , 2010 , Pages 108-120 ; 10263098 (ISSN) ; Ziaei Rad, M ; Sharif University of Technology
2010
Abstract
The transient flow of a compressible gas generated in a pipeline after an accidental rupture is studied numerically. The numerical simulation is performed by solving the conservation equations of an axisymmetric, transient, viscous, subsonic flow in a circular pipe including the breakpoint. The numerical technique is a combined finite element-finite volume method applied on the unstructured grid. A modified K - ε model with a two-layer equation for the near wall region and compressibility correction is used to predict the turbulent viscosity. The results show that, for example, after a time period of 0.16 seconds, the pressure at a distance of 61.5 m upstream of the breakpoint reduces about...