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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 11, Issue 4 - Dec 2007
Volume 11, Issue 3 - Sep 2007
Volume 11, Issue 2 - Jun 2007
Volume 11, Issue 1 - Mar 2007
Selecting the target year
A Study on the Effect of Gas Composition at Gas Supply Point on the Pressures in Gas Pipe Networks
Chang, Seung-Yong ;
Journal of the Korean Institute of Gas, volume 11, issue 2, 2007, Pages 1~4
Natural gas has different gas composition according to imported gas region, and the difference of gas composition affects pressure loss value occurred in pipe networks, Therefore, using real gas composition instead of averaged gas composition can obtain more reliable results for pipe network analysis. In this study, the effect of real gas composition at gas supply points on the demand pressure has been analyzed. To compare the results, the calculated pressure values for averaged gas composition at all the supply points have been used. From the results, we found that the effect of real gas composition consideration on demand pressure was considerable, and the real gas composition has to be considered for reliable pipe network analysis in gas industry.
A Study on the Concentration of CO(Carbon Monoxide) by the Length of the Straight Exhaust Tube for Gas Boiler
Leem, Sa-Hwan ; Huh, Yong-Jeong ; Lee, Jong-Rark ; Kim, Cheol-Jin ; Park, In-Soo ; Ha, Tae-Young ; Kim, Il-Woo ; Choi, Rack-Bum ;
Journal of the Korean Institute of Gas, volume 11, issue 2, 2007, Pages 5~9
There have been 3E problems of energy, economy and environment since the earth has its history. Especially, the energy and environment problems have been getting serious after the modem industry revolution. Therefore, the demand of gas as an eco-friendly energy source is getting increased. With the demand of gas, the installation and use of gas boiler is also increased, so human life injury by the waste gas(CO) of boiler goes on increasing every you. Hence, we want to find out the harm to human body through the study on the concentration of CO by the length of the straight exhaust tube of gas boiler. The allowable concentration of CO is 50 ppm. The 3 m of once bended tube starts exceeding the allowable concentration of CO after 5 minutes, and the 4 m and 5 m starts exceeding after 3 minutes.
The Relationship between Flash Point and Fire Properties of Flammable Liquids
Song, Young-Ho ; Ha, Dong-Myeong ;
Journal of the Korean Institute of Gas, volume 11, issue 2, 2007, Pages 10~14
Flash point is one of the major physical properties used to evaluate fire hazards of the combustible liquids. Properties showing relative fire hazards of the combustible liquids are heat release rate(HRR), peak heat release rate(PHRR), time to ignition(TTI), mass loss rate, and yield of
. The relationships between flash points and fire properties of the combustible liquids were examined in this study. For this study, mass loss rate and time to ignition were measured to calculate fire properties of the combustible liquids. The results showed that good correlations could be found between flash point and time to ignition, time to peak heat release rate, and the propensity to flashover. From a presented results, the parameters can be used to evaluate relative hazards of the combustible liquids on fire.
Consequence Analysis Using Release Scenario of API-581 BRD for Gas Explosion by Vessel Release
Kim, Tae-Ok ; Lee, Hern-Chang ; Cho, Ji-Hoon ;
Journal of the Korean Institute of Gas, volume 11, issue 2, 2007, Pages 15~24
For consequence analysis at a gas explosion by vessel release, release rates, demage areas of facilities, and fatality areas were estimated and analyzed at various conditions(release materials, temperatures, pressures, and vessel types) by using the release scenario of API-581 BRD. Simulation results showed that release rates and consequences in the vessel release were higher than those in the pipe release, and the order of release rates and damage areas was as follows; tank>reactor>drum> column.
Decomposition Study of Acetaldehyde by Metal-oxide Catalysts
Lee, Chang-Seop ; Kim, Young-Eun ; Choi, Sung-Woo ;
Journal of the Korean Institute of Gas, volume 11, issue 2, 2007, Pages 25~30
The catalysts for decomposition reaction of acetaldehyde were investigated. The catalysts were prepared with transition metal Ni, Mo, Al on
support by impregnation method. Physio-chemical properties of catalysts were characterized by SEM-EDS, XRD, XPS, BET and TPR techniques. The conversion efficiency of catalysts for acetaldehyde was measured in the temperature range of
by GC through the micro reactor system. The 8 wt%
was found to be the most active catalyst of mono-metal catalysts tested, and the 1-3 wt%
showed higher conversion efficiency than other bimetallic catalysts.
The Study on the Corrosion Characteristics of STS 304 Pipeline Steel Weldment for Gas Cooling & Heating System
Kim, Hwan-Sik ; Lim, Uh-Joh ;
Journal of the Korean Institute of Gas, volume 11, issue 2, 2007, Pages 31~36
In order to study on the corrosion characteristics of STS 304 pipeline steel weldment for gas cooling & heating system. the electrochemical polarization test and corrosion test by impressed potential in 0.5M
KSCN solution was carried out. Also, SEM and hardness of welding zone was measured. And then passive behavior, corrosion behavior by the impressed potential and SEM aspect and hardness behavior of base metal(BM) and heat affected zone(HAZ) for STS 304 pipe were investigated. The main results are as follows: 1) The critical anodic current density of heat affected zone(HAZ) is drained more highly than that of base metal(BM), and primary passive potential of HAZ become higher than that of BM. 2) The passive current density of TUE is drained more highly than that of BM, and passive region of BM become bigger than that of HAZ. 3) By the impressed potential, the current density of HAZ is drained more than that of BM.
Numerical Study on the Leakage Safety of O-rings for a LPG Cylinder Valve
Kim, Chung-Kyun ; Kim, Do-Hyun ;
Journal of the Korean Institute of Gas, volume 11, issue 2, 2007, Pages 37~42
This paper presents the leakage safety of two O-rings, which are located at the rectangular groove between a valve body and a valve stem. The leakage safety analysis of 0-ring seals has been computed as functions of a compression set and a liquefied petroleum gas pressure of a LPG cylinder using a FEM program, MARC. The FEM computed results indicate that the loads from the filling pressure of
to the upper limit of the safety valve,
work safely according to the pressure vessel code. But two O-rings should consider the aging effects for an increased safety of the o-ring.
A Study on the Sustainable Growth Strategy of the City Gas Industry through Customer Satisfaction Management
Tak, Song-Su ; Choi, Koung-Seok ; Park, Gi-Dong ; Ryou, Ok-Hyun ; Lee, Su-Kyung ;
Journal of the Korean Institute of Gas, volume 11, issue 2, 2007, Pages 43~54
Despite the importance of customer satisfaction corresponding to the phenomenal development of the gas industries, supplier-centered management still prevails in the city gas industry due to the monopolistic market environment. However, customer's demands for diverse and higher services are ever growing in the midst of the development and the accelerated competition of the service industries. In this context, customer satisfaction management may be the best style of management for establishing a short, mid and long-term foundation of growth. This paper derives directions for improving customer satisfaction management in such 3 areas as systematic, technological and service improvement from the environmental changes as well as from the customer needs. Based on the survey and comparative analysis of customer satisfaction, we also suggest 5 growth strategies to maintain sustainable development of the gas industry in the midst of competitive environment between city gas companies and among diversified energy businesses and to protect rights of the city gas consumers.
FEM Analysis on the Strength Safety of a LPG Cylinder
Kim, Chung-Kyun ; Jeong, Nam-In ;
Journal of the Korean Institute of Gas, volume 11, issue 2, 2007, Pages 55~59
This paper presents the strength safety of a LPG cylinder, which is fabricated by a steel sheet forming and a welding technology. The strength safety of a cylinder is guaranteed by analyzing a stress distribution of a LPG cylinder structure using a finite element method. The FEM computed results indicate that the hydraulic test gas pressure of
generates a concentrated local stress near the upper round end plate, which exceeds the yield strength of a LPG cylinder. Thus, the current hydraulic test pressure may be rechecked and revised because this pressure increases the fatigue failure and decreases the lift of the pressure vessel. The normal operation and sealing gas pressures such as
are relatively safe for a steel LPG cylinder.
Analysis of Performance Influencing Factor in Chemical Process Industry : A Practical Application
Yu, Kwang-Soo ; Kim, Eun-Jung ; Kim, Yong-Soo ;
Journal of the Korean Institute of Gas, volume 11, issue 2, 2007, Pages 60~64
Chemical Process industry in Korea has over 30 year's of history and is likely to face potential incidents. The traditional risk analysis and control system in Chemical Process industry focuses on mechanical defects, overlooking the human performance control. Although development of automation technology and controlling technology was necessary, human decision factor is essential to preventing accidents in the Chemical Process. Almost all serious accidents take place when inappropriate humanperformance and mechanical defects of safety equipments simultaneously occurs. The AHRA(Advanced Human Reliability Analyzer) software has been developed to collect failure data and analyze human error probability (Reliability) in Chemical Process Industry in Korea. This paper describes the HRA analysis result of PIF(Performance Influencing Factor) evaluation, HEP(Human Error Probability) and root cause of accidents by applying a Chemical Process Industry related accident data. This analysis result should present a scheme that, by controlling human error factor other than putting safety management funds into the machinery in plants, can reduce cost and maximize the safety in Chemical Process Industry.
A Study on the Explosion Phenomenon and Flame Propagation of LP Gas
Choi, Jae-Wook ; Lee, Dong-Hoon ; Kim, Tae-Gn ; Min, Wong-Chul ; Lim, Woo-Sub ; Choi, Byoung-Sik ;
Journal of the Korean Institute of Gas, volume 11, issue 2, 2007, Pages 65~70
The explosion phenomenon and hazard estimate of LP gas, the study was examined into variation of oxygen concentration and LP gas concentration. As the result of experiment, the lower explosive limit was decreased as the increased at concentration of LP gas and 21% of oxygen concentration. Minimum oxygen concentration was 14.5%. 12.0%, 11.5% at 1.0, 1.5 and 2.0 bar respectively. And maximum explosion pressure was increased for
according to increased of pressure. The speed of flame propagation was increased as the higher with initial pressure of LP gas.
A Study on U-Drawing Information System Based on Risk Assessment
Ko, Jae-Wook ; Yoo, Jin-Hwan ; Lee, Heon-Seok ;
Journal of the Korean Institute of Gas, volume 11, issue 2, 2007, Pages 71~77
This research proposes the U-drawing information system (U-DIS) based on risk assessment. One of the most outstanding features of U-DIS is to perform the Quantitative Risk Assessment directly on the screen utilizing the Process Information. U-DIS revolutionizes the existing way to do a risk assessment and helps finding information more efficiently and simply. It is designed to open all CAD drawing files on the web-based environment without having the CAD S/W installed on the PC. The U terminal platform in U-DIS supports IPv6 and wireless broadband network and U-DIS can be accessible through a sensor or personal authorization. This results in providing a systematic safety enhancement tool considering not only the operation of the process but also its risk level in the equipment industry. Additionally to aid the decision making process it offers comprehensive and thorough information based on engineering technical theory.