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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Institute of Gas
Journal Basic Information
Journal DOI :
The Korean Institute of GAS
Editor in Chief :
Volume & Issues
Volume 15, Issue 6 - Dec 2011
Volume 15, Issue 5 - Oct 2011
Volume 15, Issue 4 - Aug 2011
Volume 15, Issue 3 - Jun 2011
Volume 15, Issue 2 - Apr 2011
Volume 15, Issue 1 - Feb 2011
Selecting the target year
Major Control Techniques for Chemical and Gas Process Industries
Yoo, Sung-Jin ; Lee, Chang-Jun ; Lee, Jong-Min ;
Journal of the Korean Institute of Gas, volume 15, issue 1, 2011, Pages 1~8
DOI : 10.7842/kigas.2011.15.1.001
There has been much research interest in developing processes for production and utilization of gas and novel renewable energy resources. For these process to be economically viable, implementation of a suitable process control technique is required. This paper reviews some of the major process control techniques that have been developed over the last 50 years. In addition, some control applications in gas process industries are also presented with future directions.
A Study on the Emission Characteristics of LNG-diesel Dual-fuel Engine for Euro 2 Standard
Cho, Gyu-Baek ; Kim, Chong-Min ; Kim, Dong-Sik ; Kim, Hong-Suk ;
Journal of the Korean Institute of Gas, volume 15, issue 1, 2011, Pages 9~14
DOI : 10.7842/kigas.2011.15.1.009
Heavy duty diesel engine has relatively small portion of whole vehicles due to long drive distance and large engine displacement, but largely influences atmosphere environment. City buses changed to CNG (Compressed Natural Gas) bus with Korea-Japan Worldcup. Heavy duty truck and intercity bus, however, were impossible to use CNG because those kinds of vehicles had long drive distance and CNG station was installed mainly at the around of the bus garage of city. Insulation container storing the natural gas as a liquid makes heavy duty truck and intercity bus possible to use the natural gas. Drive using diesel is possible where is hard to recharge the gas. With LNG (Liquefied Natural Gas), the dependence on oil is largely decreased, PM (Particulate Matter) and NOx which is chronic disadvantage of diesel is remarkably reduced and finally
, the representative green house gas, is reduced over 10%.
Cost-Benefit Analysis for Determination of the Time to Implement In-line Inspection(ILI) on High Pressure Urban Gas Pipelines
Ryou, Young-Don ; Kim, Young-Seob ; Lee, Su-Kyung ;
Journal of the Korean Institute of Gas, volume 15, issue 1, 2011, Pages 15~21
DOI : 10.7842/kigas.2011.15.1.015
Cost-benefit analysis (CBA) has been performed in order to decide whether the ILI (in-line inspection) suggested as risk mitigation measure (RMM) from quantitative risk assessment is reasonably practicable. As a result of CBA, we could find out the reasonable intervals of implementation of ILI. In order to assess the benefit, value of preventing a fatality (VPF), which measures value of human life, has been used. The adequate VPF figure of high pressure urban gas pipelines for CBA used in this paper is two billion won. As a result of 2 case studies, we found that the most reasonable intervals of ILI suggested as RMM were 13 years or 15 years.
Experimental and Numerical Analysis on Vibration Behavior of Underground Three-layered Pipeline subjected to Dump Truck Loads
Cho, Seok-Ho ; Won, Jong-Hwa ; Kim, Jeong-Jae ; Kim, Moon-Kyum ;
Journal of the Korean Institute of Gas, volume 15, issue 1, 2011, Pages 22~29
DOI : 10.7842/kigas.2011.15.1.022
Pipes buried in around a construction site of urbanized area tend to be affected by the vibration caused by construction loads. The behaviors of buried pipes affected by periodic vibration were analyzed through numerical analyses based on existing study and experimental results. From the results of theses analyses, the serviceability of buried pipes subjected to vibration was verified. This study analyzed the pipe behaviors subjected to dump truck loads with respect to burial depths, and this research was performed as foundation study to establish standards for managing buried pipes. The analyses were performed with burial depth of 0.6, 1.2, 1.8m and vehicle velocity of 10km/h. From theses analyses, the vibration velocity and occurred stress tend to decrease as a burial depth increases.
Strength Safety Evaluation of Composite Pressure Container for Hydrogen Fuel Tanks
Kim, Chung-Kyun ; Kim, Do-Hyun ;
Journal of the Korean Institute of Gas, volume 15, issue 1, 2011, Pages 30~34
DOI : 10.7842/kigas.2011.15.1.030
This paper presents a strength safety evaluation of composite pressure container for hydrogen fuel tanks with a storage capacity of 104 liter and 70MPa pressure. The carbon fiber composite container is manufactured by an aluminum liner of Al6061-T6 and composite multi-layers of hoop winding layer in circumferential direction,
inclined winding layer and
winding layer in helical direction respectively. The FEM results on the strength safety of composite fuel tanks were evaluated with a criterion of design safety of US DOT-CFFC and KS B ISO 11119-2 codes. The FEM computed results indicate that the proposed design model of 104 liter composite container is safe based on two strength safety codes. But, the computed results of carbon fiber fuel tanks based on US DOT-CFFC code is safer compared with that of KS B ISO 11119-2. Thus the hydrogen gas pressure container of 70MPa may be evaluated and designed by US DOT-CFFC code for more strength safety.
The Effects of Affecting Ratios on the Strength Safety of a Composite Fuel Tank for FEV Vehicles
Kim, Chung-Kyun ; Kim, Do-Hyun ;
Journal of the Korean Institute of Gas, volume 15, issue 1, 2011, Pages 35~39
DOI : 10.7842/kigas.2011.15.1.035
The purpose of this paper is to analyze affecting ratios of strength safety in carbon fiber layer thickness of a composite fuel tank for FEV vehicles. To investigate affecting ratios by FEM modeling, the equivalent von Mises stress has been computed on the aluminum liner and carbon fiber layers of composite fuel tanks in hoop and helical directions respectively. According to the FEM results, the affecting ratios of an aluminum liner on the equivalent stress are 77.5% in hoop direction, 18.11% in
winded helical direction and 4.39% in
winded helical direction. These trends on the strength safety of carbon fiber layers have been shown as those of an aluminum liner even though the layer thickness ratio of
inclined carbon fiber is very high of 42% compared with that of hoop layer thickness. Thus, the computed results show that the strength safety of a carbon fiber fuel tank is more influenced by the winding angle rather than the fiber thickness of carbon fiber layers.
Reduction of Thermal Radiation from Flare Stack by Flare Gas Recovery Unit
Lee, Heon-Seok ; Lee, Dong-Heuk ; Yoo, Jin-Hwan ; Park, Chul-Hwan ; Ko, Jae-Wook ;
Journal of the Korean Institute of Gas, volume 15, issue 1, 2011, Pages 40~45
DOI : 10.7842/kigas.2011.15.1.040
During process operations, overpressure can be caused by operator's error or malfunction of the device. To prevent this overpressure, gas was released through blowdown system. Because most of released gases are the hydrocarbon mixture and have flammable and toxic properties, the gas is released after burning in flare stack. The increase of scale and complexity of plant requires higher or additional flare stacks. This study tried to solve this problem through flare gas recovery system.
Developing Network Infrastructure and Smart Service for Safety Management of City-gas Facilities
Oh, Jeong-Seok ; Sung, Jong-Gyu ; Kim, Young-Dae ;
Journal of the Korean Institute of Gas, volume 15, issue 1, 2011, Pages 46~53
DOI : 10.7842/kigas.2011.15.1.046
The information technology paradigm has been shift to smart service environment, as ubiquitous technology is used in the latest industry trend. The convergency between industry facilities and ubiquitous technologies accelerate related studies and technologies because of increasing accident prevention and decreasing cost. However, ubiquitous technologies are not used to life environment and industry facilities, because those technologies did not consider industry domain characteristics by means of developing IT technology for common environment until now. This paper aims to develop wireless city gas safety management system, which provide efficient service, and establish the field oriented wireless data transmission infrastructure in order to use ubiquitous technology to city gas facilities.
A Pipeline Network Analysis on the Source and the Relation with Pipe Diameter of the Flow Hunting in a Orifice Meter
Shin, Chang-Hoon ;
Journal of the Korean Institute of Gas, volume 15, issue 1, 2011, Pages 54~59
DOI : 10.7842/kigas.2011.15.1.054
Generally, the flow hunting is observed in almost all of the orifice meters but the intensity of the flow hunting is different at each metering system. In order to investigate the relations between pipe diameter and the flow instability or the flow hunting in a real metering system, a one-dimensional pipeline network model was built and analyzed for the examination of flow characteristics and relations to the flow hunting, changing diameters of the meter and the pipes before and after the meter. Finally, the effects of pressuredifference variation and flow hunting following to the variations of the diameters of the meter and the pipes before and after the meter were investigated and the relations were examined as well.
Explosion Simulations for the Quantitative Risk Analysis of New Energy Filling Stations
Dan, Seung-Kyu ; Park, Kyung-Jun ; Kim, Tae-Ok ; Shin, Dong-Il ;
Journal of the Korean Institute of Gas, volume 15, issue 1, 2011, Pages 60~67
DOI : 10.7842/kigas.2011.15.1.060
The interest about new and renewable energy is increasing to reduce the burden of problems by depletion of fossil fuels and air pollutions. For example, LNG/CNG and LPG are expected to be replaced, especially in transportation use, by HCNG mixture and DME-LPG mixture, respectively. Because these new energies are still flammable gases, it is not inherently safe from the explosion. In this research, the quantitative risk analysis for using alternative mixtures in existing recharging facilities has been studied by using three types of explosion models (TNT equivalency model, PHAST and CFD-based FLACS) to manage the risk effectively. The differences of results by models were compared against, and the practical ways of when and how to use these models were suggested. It was also predicted that conventional gas filling stations would be converted as new energy stations without additional explosion risk.
Analysis of Recent Accidents and Regulating Activities for the Hazardous Materials in Korea
Kwon, Kyung-Ok ; Kim, Young-Eun ;
Journal of the Korean Institute of Gas, volume 15, issue 1, 2011, Pages 68~73
DOI : 10.7842/kigas.2011.15.1.068
The systems in Korea regarding manufacture, storage, transport and use of hazardous materials are regulated by the related laws and ordinances. The number of accident from hazardous materials has recently decreased but the size of accident has increased according to the hazardous substances are greatly consumed and delivered. The results of analysis showed that most of accidents are caused by human problems and occurred frequently at unauthorized facilities. It is suggested that workers should be trained more and the strict regulation on unauthorized facilities is needed to reduce the accidents caused by hazardous materials.
Development of Risk Based Inspection (RBI) Procedures for Optimized Preventive Maintenance (PM) Planning of Energy Plants
Choi, Jeong-Woo ; Yoon, Kee-Bong ;
Journal of the Korean Institute of Gas, volume 15, issue 1, 2011, Pages 74~80
DOI : 10.7842/kigas.2011.15.1.074
Recently, needs for extending remaining life and integrity of the aged energy plants are increased since the most domestic plants have been operated over 10 years. This need makes RAM (reliability, availability and maintainability) of the plant become more significant. RBI (risk based inspection) is main technology to increase RAM in energy plants. So far RBI has been developed mainly in the field of process plants (chemical/refinery), underground buried pipelines or nuclear power plants. However, the existing RBI procedure is limited mainly to process plants, it need to be extended to the other energy plants such as fossil power plants. In this study, a general RBI procedure for optimized PM (preventive maintenance) is proposed for various energy plants.