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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Institute of Gas
Journal Basic Information
Journal DOI :
The Korean Institute of GAS
Editor in Chief :
Volume & Issues
Volume 19, Issue 6 - Dec 2015
Volume 19, Issue 5 - Oct 2015
Volume 19, Issue 4 - Aug 2015
Volume 19, Issue 3 - Jun 2015
Volume 19, Issue 2 - Apr 2015
Volume 19, Issue 1 - Feb 2015
Selecting the target year
Numerical Study on the Strength Safety of a Fuse Cock Valve
Kim, Chung Kyun ;
Journal of the Korean Institute of Gas, volume 19, issue 5, 2015, Pages 1~6
DOI : 10.7842/kigas.2015.19.5.1
In this paper, the strength safety of a fuse cock main body has been analyzed by the finite element method. The stress and displacement behaviour characteristics have been investigated for thickness variations at the region of (T) between a ball valve and a fuse cock safety connector. The FEM analyzed results recommend that the optimized thickness at the region of (T) is from 1.55mm to 1.6mm for the supplied gas pressure of 1.5~3.5MPa. This is considered for the optimized strength safety and light weight of a fuse cock main body.
Study on the Performance of a Spark Ignition Gas Engine for Power Generation fueled by the Methane/Syngas Mixture
Cha, Hyoseok ; Hur, Kwang Beom ; Song, Soonho ;
Journal of the Korean Institute of Gas, volume 19, issue 5, 2015, Pages 7~12
DOI : 10.7842/kigas.2015.19.5.7
Hydrogen is usually produced by using syngas generated by the fuel reforming for natural gas so far. The further process is needed for increasing the hydrogen yield of syngas. However, the process for upgrading the hydrogen yield is accompanied by additional energy sources and economic costs. Thus related studies on the method for using as a mixture in itself have been conducted in order to utilize more efficiently syngas. The effect on the engine performance for methane/syngas mixture of 30kW spark ignition gas engine for power generation has been investigated in this study. As a result, it was found that the combustion phenomena such as the maximum in-cylinder pressure and crank angle at that time have been improved by methane/syngas mixture. Through these, fuel conversion efficiency could be enhanced by about 98% of methane/hydrogen mixture and
emissions could be reduced by about 12% of methane-hydrogen mixture.
Modeling of Multi-Stage Hydraulic Fracture Propagation
Jang, Youngho ; Sung, Wonmo ;
Journal of the Korean Institute of Gas, volume 19, issue 5, 2015, Pages 13~19
DOI : 10.7842/kigas.2015.19.5.13
This paper presents a hydraulic fracture propagation model to describe propagation more realistically. In propagating the hydraulic fractures, we have used two criteria: maximum tangential stress to determine the fracture initiation angle and whether a hydraulic fracture intersects a natural fracture. The model was validated for the parameters relevant to fracture propagation, such as initiation angle and crossing ability through natural fracture. In order to check whether a hydraulic fracture crosses a natural fracture, the model results on crossing state excellently matched with the experimental data. In the sensitivity analysis for direction of maximum horizontal stress, frictional coefficient of fracture interface, and natural fracture orientation, the results show that hydraulic fracture intersects natural fracture, and then, propagated suitably with theoretical results according to fracture interaction criterion. In comparison of this model against vertical fracture approach, it was ascertained that there are discrepancies in fracture connectivity and stimulated reservoir volume.
Size and Shape Effect of Metal Oxides on Hydrocarbon Selective Catalytic Reduction of Nitrogen Oxides
Ihm, Tae-Heon ; Jo, Jin-Oh ; Hyun, Young Jin ; Mok, Young Sun ;
Journal of the Korean Institute of Gas, volume 19, issue 5, 2015, Pages 20~28
DOI : 10.7842/kigas.2015.19.5.20
This work investigated the size and shape effect of
-alumina-supported metal oxides on the hydrocarbon selective catalytic reduction of nitrogen oxides. Several metal oxides including Ag, Cu and Ru were used as the catalysts, and n-heptane as the reducing agent. For the Ag/
-alumina catalyst, the
reduction efficiency in the range of
increased as the size of Ag decreased (20 nm>50 nm>80 nm). The shape effect of metal oxides on the
reduction was examined with spherical- and wire-shape nanoparticles. Under identical condition, higher catalytic activity for
reduction was observed with Ag and Cu wires than with the spheres, while spherical- and wire-shape Ru exhibited similar
reduction efficiency to each other. Among the metal oxides examined, the best catalytic activity for
reduction was obtained with Ag wire, showing almost complete
removal at a temperature of
. For Cu and Ru catalysts, considerable amount of NO was oxidized to
, rather than reduced to
, leading to lower
A Development of an Array Guided Wave Ultrasonic Testing System for pipe inspection
Cho, Hyun-Joon ; Lee, Dong-Hoon ; Kang, To ; Park, Jin-Ho ; Han, Seong-Jin ;
Journal of the Korean Institute of Gas, volume 19, issue 5, 2015, Pages 29~35
DOI : 10.7842/kigas.2015.19.5.29
Pipes, commonly used in energy and petrochemical facilities, have various types of defects induced by diverse factors and this is often issued in NDE society. Ultrasonic guided wave inspection method are normally adopted to insure the healthiness of industry pipes. Recently, ultrasonic guided wave inspection is shifted to adopt arrayed probes and system. And here we developed an array guided wave ultrasonic testing system can adapt arrayed probes and focusing methods. In this paper, an array guided wave ultrasonic testing system is presented including a transmitting focusing technique and flaw signal level enhancement.
A Study for the Safety on the Flame Exposure of the Propane Cylinder
Yim, Sang-Sik ; Jang, Kap-Man ; Lee, Jin-Han ; Park, Gi-Dong ; Kim, Ki-Bum ;
Journal of the Korean Institute of Gas, volume 19, issue 5, 2015, Pages 36~40
DOI : 10.7842/kigas.2015.19.5.36
To evaluate the safety of propane cylinder, the flame test was performed by the flame exposure scenario of propane cylinder. The cylinder which was exposed in a flame was rapidly occurred to increase the internal pressure by liquid expansion, if so it cause of physical explosion. Therefore, the cylinder which was applied with thermal pressure relief device sholud be not bursted and the propane should be discharged to outside safely. The flame average temperature that was around of cylinder is
, and then it increased
by discharged propane. The result of flame test, the cylinder was deformed, but it was not bursted. The regulations of flame exposure test for propane cylinder were not restricted, this paper can be applied to restrict the flame test if the cylinder is possible to expose the flame. Also, the results is expected as reference for estimation of the pressure cylinder performance.
Ultrasonic linear and nonlinear properties of fatigued aluminium 6061-T6 with voids
Kang, To ; Song, Sung-Jin ; Na, Jeong K. ; Park, Jin-Ho ;
Journal of the Korean Institute of Gas, volume 19, issue 5, 2015, Pages 41~46
DOI : 10.7842/kigas.2015.19.5.41
It is known that in aluminum 6061-T6, which is composed of
, void nucleation grows around
of Al606-T6. In this work, growth of voids was checked by scanning a 6061-T6 specimen with SEM observation. The effects of dislocation damping, coherency strain and voids on ultrasonic attenuation and nonlinearity parameters were experimentally measured. It was observed that a nonlinearity parameter increases until 75 percent of fatigue life and decreases after that. From the results, the authors inferred that dislocation damping and coherency damping increase nonlinearity parameters and void nucleation decreases them as ultrasonic scattering increases with void. The application of nonlinearity parameters in estimating degradation of materials with complex microstructures through fatigue process, therefore, should be carefully considered.
Stress and Displacement Analysis of Arctic Frostheave with Gas Pipeline using Finite Element Method
Kim, Kyung Il ; Yeom, Kyu Jung ; Oh, Kyu Hwan ; Kim, Woo Sik ;
Journal of the Korean Institute of Gas, volume 19, issue 5, 2015, Pages 47~53
DOI : 10.7842/kigas.2015.19.5.47
According to the interest of the arctic`s resources rising, many countries are making moves to develop these resources. Korea has also undergone negotiations with Russia to develop natural gas resources in Siberia, which is geographically relatively close. However, the Arctic resources market is dominate, it is essential to develop construction techniques that are suited for the Arctic. Gas pipelines in the Arctic are affected by frost heave due to the region`s extremely low temperatures, a condition that is not present in Korea, making it vital to develop a finite element method (FEM) model. This research paper study a model of gas pipe lines in the Arctic and frost heave using FEM.
Measurement and Prediction of Autoignition Temperature(AIT) of n-Decane+Ethylbenzene System
Lee, Jae-Hwa ; Kim, Gui-Ju ; Hong, Soon-Kang ; Ha, Dong-Myeong ;
Journal of the Korean Institute of Gas, volume 19, issue 5, 2015, Pages 54~60
DOI : 10.7842/kigas.2015.19.5.54
The autoignition temperature (AIT) of a material is the lowest temperature at which the material will spontaneously ignite. The AIT is important index for the safe handling of flammable liquids which constitute the solvent mixtures. This study measured the AITs of n-decane+ethylbenzene system by using ASTM E659 apparatus. The AITs of n-decane and ethylbenzene which constituted binary system were
, respectively. The experimental AITs of n-decane+ethylbenzene mixture were a good agreement with the calculated AITs by the proposed equations with about
A.A.D.(average absolute deviation).
Development of Accident Response Program for Hazardous Material(HAZMAT) Transport Vehicles
Lee, Hyun-Jin ; Han, Seung-Hoon ; Chae, Chung-Keun ; Yong, Jong-Won ; Tae, Chan-Ho ; Ko, Jae-Wook ;
Journal of the Korean Institute of Gas, volume 19, issue 5, 2015, Pages 61~68
DOI : 10.7842/kigas.2015.19.5.61
This study develop accident response program for the hazardous materials(HAZMAT) transport vehicle with materials database and guidelines for accident response. Guidelines was developed by guideline develop processes of FEMA after identify hazards. Developed material database was applied the GHS. also database was optimized by removing data that can confuse to accident response. Finally, This study verify developed programs through case study.
Characteristics of Heat Transfer and Chemical Reaction in Reformer Tube for Fuel Reynolds Number and Burner Gas Temperature
Han, Jun Hee ; Yoon, Kee Bong ; Kim, Ji Yoon ; Lee, Seong Hyuk ;
Journal of the Korean Institute of Gas, volume 19, issue 5, 2015, Pages 69~74
DOI : 10.7842/kigas.2015.19.5.69
The study investigated numerically the heat transfer and chemical reaction characteristics of a methane-steam reforming by using a 3-dimensional computational fluid dynamics (CFD) code (Fluent ver. 16.1). The fuel temperature and its species mole fractions were estimated for various Reynolds number in the reformer tube at different burner temperatures. The catalysts were modeled as the porous medium of nicrome in the reformer tube. We considered radiation effect as well as conduction and convective heat transfer because the methane-steam was reformed at very high temperature condition above 1000 K. For two different Reynolds numbers of 49,000 and 88,000 and the burner temperatures were in the range from 1,100 K to 1,300 K. At a low Reynolds number, the fuel temperature increased, leading to increase in hydrogen reforming. However, fuel temperature and hydrogen reforming decreased because of higher convective heat transfer from relatively low fuel temperature. Moreover, the hydrogen reforming also increased with burner temperature.
Pyrolysis Hazard for Nano and Micro-sized Aluminium Dusts
Han, Ou-Sup ;
Journal of the Korean Institute of Gas, volume 19, issue 5, 2015, Pages 75~80
DOI : 10.7842/kigas.2015.19.5.75
Aluminum dusts, from micro to nano-scale, are widely used in various applications such as propulsion and pyrotechnic compounds because of high burning rate. In this study, the pyrolysis hazard of aluminum dusts with different median size (sized by 70 nm, 100 nm,
) were investigated experimentally. The thermal decomposition characteristics of aluminum dusts with the variation of heating rate were investigated using TGA (Thermo gravimetric analysis) and was estimated the minimum ignition temperature from temperature of weight gain in nano and micro-sized aluminum dusts with different diameter. In the same condition of heating rate, the temperature of weight gain in aluminum dust layers increased with increasing of particle size and increased with increasing of heating rates in air. From the results, it was estimated that the pyrolysis hazard of aluminum dusts decrease with increasing of mean diameter.
Reliability Assessment for Corroded Pipelines by Separable Monte Carlo Method
Lee, Jin-Han ; Jo, Young-Do ; Kim, Lae Hyun ;
Journal of the Korean Institute of Gas, volume 19, issue 5, 2015, Pages 81~86
DOI : 10.7842/kigas.2015.19.5.81
A deterministic stress-based methodology has traditionally been applied in pipeline design. Meanwhile, reliability based design and assessment (RBDA) methodology has been extensively applied in offshore or nuclear structures. Lately, the release of ISO standard on reliability based limit state methods for pipelines ISO16708 indicates that the RBDA methodology is one of the newest directions of natural gas pipeline design method. This paper presents a case study of the RBDA procedure for predicting the time-dependent failure probability of pipelines with corrosion defects, where separable Monte Carlo (SMC) method is applied in the reliability estimation for corroded pipeline instead of traditional, crude Monte Carlo(CMC) Method. The result shows the SMC method take advantage of improving accuracy in reliability calculation.
A Study on Accident Response Guidelines for Hazardous Materials(HAZMAT) Transport Vehicle
Seol, Ji Woo ; Yong, Jong Won ; Chae, Chung-Keun ; Tae, Chan Ho ; Ko, Jae Wook ;
Journal of the Korean Institute of Gas, volume 19, issue 5, 2015, Pages 87~97
DOI : 10.7842/kigas.2015.19.5.87
Accidents of HAZMAT transport vehicle are generally dealt by unskilled firefighters. As a result, firefighters became 2nd victims of accidents in some case because of this reason, and it is required to prepare an accident response guidelines against HAZMAT transport vehicle accidents. In this study, risk assessment methods and making methods of guidelines were investigated to make accident response guidelines of HAZMAT transport vehicle accidents. and It identifies hazards and combines with guideword for making guideline items. At last, we determine criteria or detailed methods by referring survey regulations and existed methods.
A Study on the Method for Releasing the Internal Pressure of the Propane Cylinder caused by Liquid Expansion
Yim, Sang-Sik ; Jang, Kap-Man ; Lee, Jin-Han ; Park, Gi-Dong ; Kim, Ki-Bum ;
Journal of the Korean Institute of Gas, volume 19, issue 5, 2015, Pages 98~103
DOI : 10.7842/kigas.2015.19.5.98
Liquefied petroleum gas can be charged up to 85% of cylinder volume by enforcement regulations of safety control and business of liquefied petroleum gas act. The charged mass by enforcement regulations is considered by liquid expansion of internal liquefied petroleum gas at
. But the temperature of liquid would not be suspended under
in a cylinder or portable vessel at certain situation. In the thermodynamics view point, the cylinder can be exposed to high pressure by liquid expansion. Consequently, it can be possible to potential risk such as physical explosion. Hence, this paper will offer a method of estimated internal pressure by liquid expansion at critical state in the closed system. Also, the structural factor which is given rise to volume increasement of cylinder is offered by experiment. This paper is expected as crucial reference for a cylinder design of liquefied petroleum gas.
Thermo-Fluid Characteristics of Pipeline Transportation of Natural Gas at Artic & Northern Ice Environments
Kim, Ho-Yeon ; Kim, Young-Pyo ; Kim, Woo-Sik ;
Journal of the Korean Institute of Gas, volume 19, issue 5, 2015, Pages 104~111
DOI : 10.7842/kigas.2015.19.5.104
The technology development of pipeline transportation of natural gas at artic and northern ice environments should be considered with unique characteristics of permafrost territory as a very interesting and challenging area. This work is to investigate bottleneck techniques and major impact factors through a literature search to figure out the core technology of the transport pipeline. Especially, theoretical approach themes could be determined to develop the technology flow assurance for permafrost regions through documentary survey on the considerations of thermo-fluid. Also, basic results through theoretical approaches could be achieved.