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Tehran, Iran

The National Iranian Gas Company was established in 1965 as one of the four principal companies affiliated to the Ministry of Petroleum of the Islamic Republic of Iran with 25,000 million Rials initial capital.NIGC is responsible for the treatment, transmission, and delivery of natural gas to the domestic, industrial, and commercial sectors and power plants. The National Iranian Gas Exports Company was created in 2003 to manage and to supervise all gas pipeline and LNG projects. Until May 2010, NIGEC was under the control of the NIOC, but the Petroleum Ministry transferred NIGEC, incorporating it under NIGC in an attempt to broaden responsibility for new natural gas projects.As at 2012, 12,750 villages have been connected to gas network. NIGC does not play a role in awarding upstream gas projects; that task remains in the hands of the National Iranian Oil Company. Iran has the largest gas network in the world with 30,000 kilometres of high-pressure pipelines. Wikipedia.


Ghiasi M.M.,National Iranian Gas Company | Bahadori A.,Southern Cross University of Australia | Zendehboudi S.,University of Waterloo
Journal of Natural Gas Science and Engineering | Year: 2014

Natural gas usually contains a large amount of water and is fully saturated during production operations. In natural gas dehydration units' water vapor is removed from natural gas streams to meet sales specifications or other downstream gas processing requirements. Many methods and principles have been developed in the natural gas dehydration process for gaining high level of triethylene glycol (TEG) purity. Among them, reducing the pressure in the reboiler at a constant temperature results in higher glycol purity. The main objective of this communication is the development of an intelligent model based on the well-proven standard feed-forward back-propagation neural network for accurate prediction of TEG purity based on operating conditions of reboiler. Capability of the presented neural-based model in estimating the TEG purity is evaluated by employing several statistical parameters. It was found that the proposed smart technique reproduces the reported data in the literature with average absolute deviation percent being around 0.30%. © 2014 Elsevier B.V. Source


Rahimi M.,Razi University | Asgary K.,Razi University | Jesri S.,National Iranian Gas Company
International Communications in Heat and Mass Transfer | Year: 2010

This paper reports a study on the effect of the condenser and evaporator resurfacing on overall performance of a 1. m height closed two-phase thermosyphon. Water was used as working fluid with a fill ratio and operating pressure was 0.75 and 160. mbar, respectively. The thermosyphon performances for plain and modified thermosyphon were studied at 44 power inputs from 43. W to 668. W. The results show that by making the evaporator more hydrophilic and the condenser more hydrophobic, it will be possible to increase the average thermal performance by15.27% and decrease the thermal resistance by 2.35 times compared with the plain one. © 2010 Elsevier Ltd. Source


Tavan Y.,National Iranian Gas Company
Journal of Natural Gas Science and Engineering | Year: 2014

The azeotropes are always considered as a serious problem in chemical industries and most of the published researches on the subject of CO2-ethane azeotropic process are focused on distillation columns and heat exchangers, in order to separate these components. The present study is aimed to remove this azeotrope with the help of reaction and the azeotropic mixture is introduced to an industrial reformer to produce syngas (H2 and CO), as a novel work. In order to simulate reforming process, two dimensional mathematical modeling is proposed and coke formation as main problem of reforming process is thermodynamically investigated. © 2014 Elsevier B.V. Source


Seismic hazard maps are widely used for engineering design, land-use planning, and disaster mitigation. The development of the new seismic hazard map of Iran with regard to the specification of Iranian high-pressure gas network is based on probabilistic seismic hazard analysis using the historical and new earthquakes data, geology, tectonics, fault activity, and seismic zone models in Iran. The map displays the probabilistic estimates of peak ground acceleration for the return period of 2,475 year (2 % probability in 50 years). The results presented in this study will provide the basis for the preparation of risk map, the estimation of insurance premiums, finding best paths for future pipelines, planning, and relocating lifeline facilities especially for interconnected infrastructures. © 2014 Springer Science+Business Media Dordrecht. Source


Tavan Y.,National Iranian Gas Company
Energy Conversion and Management | Year: 2014

Two-dimensional mathematical model is used for natural gas reforming to produce syngas. It is seen that coke formation by the Boudouard reaction is significant in entrance of the reactor and the maximum temperature gradient between the bed centerline and the wall is predicted to be 350 K. In order to reduce carbon filament formation and to avoid tube failure, heating value of the combustible fluid is increased to 15.5% by introducing ethane component as combustible fluid and the results show a better performance for reforming process in terms of lower coking and lower tube failure as compared to the industrial conditions. © 2014 Elsevier Ltd. All rights reserved. Source

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