نتایج جستجو برای: natural gas transmission pipeline

تعداد نتایج: 968864  

2012
Vadim Seleznev

At the present level of development of long, branched gas transmission networks (GTN), solving the problems of improving safety, efficiency and environmental soundness of operation of industrial pipeline systems calls for the application of methods of numerical simulation. The development of automated devices for technical inspection and process control, and availability of high-performance com...

2003
Dieter Hausamann Werner Zirnig Gunter Schreier

It is in the interest of any gas company to maintain the value of its pipelines and to protect them effectively against damage caused by third parties. As a result of global progress in high-resolution remote sensing and image processing technology, it is now possible to design natural gas pipeline monitoring systems with remote sensors and context-oriented image processing software. Recent dev...

Ahmad J.Afshari Seyed Hossain Ebrahimi

The technical equipment developed and used in both installation and operation processes in refineries, oil and gas pipelines, and gas booster stations has always been expensive. Hence, managers at different organizational levels are keen to find methods to control and reduce these costs. Generally speaking, the operators in a gas booster station choose the operating devices without considering ...

Natural gas plays a key role in Iran’s economy and using its shadow price in allocating it to different sectors can lead to optimal use of this resource. This study uses a non-linear input-output model to estimate the shadow price of natural gas in different economic sectors in Iran. The study uses values of the input-output table constructed by the Statistics Center of Iran for the year 2011. ...

Journal: Gas Processing 2016
Hosein Vazini Modabber Mohammad Hassan Khoshgoftarmanesh, Vahid Mazhari

Performance of a gas turbine mainly depends on the inlet air temperature. The power output of a gas turbine depends on the flow of mass through it. This is precisely the reason why on hot days, when air is less dense, power output falls. The objective here is to assess the advanced systems applied in reducing the gas turbine intake air temperature and examine the merits from integration of the ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده مهندسی عمران 1386

در تحقیق حاضر دو هدف کلی دنبال شده است. هدف اول یافتن مدل های احتمالاتی برای خرابی لوله های مدفون در حالات شایع بارگذاری لرزه ای است. دست یابی به مدل احتمالاتی خرابی لوله ها در واقع ابزار اصلی یافتن برآورد از زیان شبکه است. در محاسبه احتمال خرابی لوله ها پارامترهایی مانند خوردگی، ابعاد لوله و میزان نشست زمین مستقیماً در روابط داخل شده اند. که از این نظر مدل های پیشنهادی دارای امتیاز است. هدف دوم...

2012
Zhao Yang Mingliang Liu Min Shao Yingjie Ji

Recently, with large-scale use of natural gas and massive constructions of gas pipelines, more and more public concern is focused on pipeline leakage. The leakage caused by holes on gas pipelines generates economic losses to gas companies and causes risks to the environment and sometimes accidents. In order to detect and locate pipeline rupture immediately, the leakage detection method plays a ...

Journal: :Chaos 2011
Cong Liu Mohammad Shahidehpour Jianhui Wang

This paper focuses on transient characteristics of natural gas flow in the coordinated scheduling of security-constrained electricity and natural gas infrastructures. The paper takes into account the slow transient process in the natural gas transmission systems. Considering their transient characteristics, natural gas transmission systems are modeled as a set of partial differential equations ...

2005
Volker Krey

Rapidly growing natural gas demand in China has formed a precondition to investigate the potential of several pipelines from Russia and other CIS countries, which could possibly head their flows to the Chinese natural gas market. The variety of proposed projects and the difference in their characteristics results in competition and, therefore, in order to assess the projects’ economic perspecti...

A new analytical equation for prediction of temperature profile of a buried gas pipeline is developed. Utility of this equation is illustrated by its application to corresponding states principle. The resulting equation is tested through prediction of the actual Schorre data. It is shown that the new equation can predict temperature profile more accurately than the others without using any char...

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