Go to the main menu
Skip to content
Go to bottom
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 18, Issue 6 - Dec 2014
Volume 18, Issue 5 - Oct 2014
Volume 18, Issue 4 - Aug 2014
Volume 18, Issue 3 - Jun 2014
Volume 18, Issue 2 - Apr 2014
Volume 18, Issue 1 - Feb 2014
Selecting the target year
Application Research on LPG Injector type Plasma Reformer
Kim, Changup ; Lee, Deahoon ;
Journal of the Korean Institute of Gas, volume 18, issue 1, 2014, Pages 1~7
DOI : 10.7842/kigas.2014.18.1.1
In this study, plasma reformer technology with a LPG injector was investigated. It was developed with injection of LPG fuel and air in a region where the plasma discharge to make the thermal decomposition carbon fuel and to generate additional hydrogen. As a result of reforming test, when power is 70~100W supply, about HC 0.7% of the full reformed gas and hydrogen was generated from 1.2 to 1.5 %.
The Study of Prediction Model of Gas Accidents Using Time Series Analysis
Lee, Su-Kyung ; Hur, Young-Taeg ; Shin, Dong-Il ; Song, Dong-Woo ; Kim, Ki-Sung ;
Journal of the Korean Institute of Gas, volume 18, issue 1, 2014, Pages 8~16
DOI : 10.7842/kigas.2014.18.1.8
In this study, the number of gas accidents prediction model was suggested by analyzing the gas accidents occurred in Korea. In order to predict the number of gas accidents, simple moving average method (3, 4, 5 period), weighted average method and exponential smoothing method were applied. Study results of the sum of mean-square error acquired by the models of moving average method for 4 periods and weighted moving average method showed the highest value of 44.4 and 43 respectively. By developing the number of gas accidents prediction model, it could be actively utilized for gas accident prevention activities.
Review about Thermal Stability Reinforcing Method of the Concrete Sidewall of the LNG Storage Tank Using Sprayed PUF
Lee, Yeongbeom ; Choe, Keonhyeong ; Yoon, Ihnsoo ; Han, Chonghun ;
Journal of the Korean Institute of Gas, volume 18, issue 1, 2014, Pages 17~24
DOI : 10.7842/kigas.2014.18.1.17
LNG storage tank is a facility to store liquefied natural gas (LNG) and its safety and stability to be greatly needed. When there is a LNG leakage in case of primary container problem, a special facility such as a bund wall should be constructed to store the leaked LNG. But this method makes the land usage inefficient and construction price high. So nowadays the full containment type LNG storage tank is selected instead of constructing a bund wall. In the full containment type tank, the concrete sidewall has the ability to store LNG temporarily. There are largely two methods to give the concrete sidewall the ability. In a method, rebar should be used when constructing the side wall of the LNG storage tank. In the other method, the protecting material such as sprayed polyurethane foam should be applied on the inner surface of the concrete sidewall. Sprayed PUF keeps the temperature of the sidewall above the specified temperature during the specified periods. Recently the thermal stability reinforcing method using sprayed polyurethane foam has been applied to all LNG storage tank built in Korea.
High Pressure Refueling Method for HCNG Gas Supply
Kim, Sang-Min ; Lee, Joong-Seong ; Han, Jeong-Ok ; Lee, Yeong-Cheol ; Kim, Yong-Cheol ; Chae, Jeong-Min ; Hong, Seong-Ho ;
Journal of the Korean Institute of Gas, volume 18, issue 1, 2014, Pages 25~30
DOI : 10.7842/kigas.2014.18.1.25
Mixture of hydrogen and natural gas HCNG mixing equipment production and refueling experiment were performed for supply and product. Hydrogen and CNG in 30 : 70 ratio is mixing of HCNG was performed using ratio control. HCNG refueling method was calculated after reading the pressure of tank for full refuel, amount refuel. Both full refuel and amount refuel results mixed ratio 30 : 70 in the error limits of
met the criterion. HCNG composition analysis result in refueling tank using gas chromatography is satisfying the error limits in refuel tank 30 : 70 ratio were confirmed.
Analysis Evaluation of Impact Behavior of 270,000kL LNG Storage Outer Tank from Prestress Force Loss
Lee, Sang-Won ; Jun, Ha-Young ; Kim, Jang-Ho Jay ; Kim, Jun-Hwi ; Lee, Kang-Won ;
Journal of the Korean Institute of Gas, volume 18, issue 1, 2014, Pages 31~40
DOI : 10.7842/kigas.2014.18.1.31
LNG storage outer tank is a vertically and horizontally prestressed concrete wall structure. Therefore, when the storage tanks become larger, prestressing tendons become longer and eventually the prestressing loss becomes larger. Also, recently, bomb terrors and accidental crashes have occurred frequently on important infrastructures. Therefore, LNG storage tanks are also exposed to these dangerous scenarios, where they need to be evaluated and protected from these threats. Therefore, in this study, the behavior of 270,000 kL LNG storage outer tank impacted by a flying object is evaluated using implicit FEM code, LS-DYNA. In the analysis, the prestress loss due to the increased length of prestressing tendons from enlargement of outer tank is considered. A comparison study between the LNG tanks with and without prestress loss is performed to investigate the impact behavior and the effect of prestressing force change on the safety and serviceability prestressed concrete containment.
A Study on the Displacement Behavior Safety of Cylindrical Hollow Rollers
Kim, Chung Kyun ;
Journal of the Korean Institute of Gas, volume 18, issue 1, 2014, Pages 41~45
DOI : 10.7842/kigas.2014.18.1.41
This paper presents an analytical study on the displacement behavior safety of cylindrical hollow rollers. Using the finite element method, the hollow roller with Y-shaped column structures between three tubes has been developed to analyze the displacement behavior safety. For the same dimension and weight of two hollow roller models, the displacement behavior safety of a typical hollow roller is lower 4~6.6% than that of the newly designed hollow roller with Y-shaped column structures between three tubes. Thus, this paper recommends Y-shaped hollow roller for increasing the roller strength safety and decreasing a total roller weight, which may save a consuming electrical energy.
A Study for Automotive Lamp Manufacturing System Control Composing Ultra melting Process
Lee, Il-Kwon ; Kook, Chang-Ho ; Kim, Seung-Chul ; Kim, Ki-Jin ; Han, Ki-Bong ;
Journal of the Korean Institute of Gas, volume 18, issue 1, 2014, Pages 46~51
DOI : 10.7842/kigas.2014.18.1.46
The purpose of this paper is to study of the vehicle lamp manufacturing system composing ultrasonic waves connection process. Making lamp assembly plant, it was produced in the separate process as the injection molding, ultrasonic waves bonding, annealing in the constant temperature, lamp assembling and packing. But the improvement method producing the lamp was added with one-step process by one automation technique. As a result, welding with ultrasonic waves process, the method decreased the energy consumption and noise during ultrasonic waves welding. Therefore, this method used the mathematics modeling for checking validity, it selected the stability and suitable controller using transfer function of plant and bode chart. In this study, the
revolution control system to turn injection part upside down was
because of gravity influence. It effected to unstable condition a system. For solving this problem, it aimed the linearization and stabilization of system by elimination
as applying Free-forward control technique.
Consequence Analysis for Fire and Explosion Accidents in Propylene Recovery Process
Han, Seong-Hwan ; Lee, Hern-Chang ; Park, Kyoshik ; Kim, Tae-Ok ;
Journal of the Korean Institute of Gas, volume 18, issue 1, 2014, Pages 52~60
DOI : 10.7842/kigas.2014.18.1.52
This study aims to suggest risk management plan including safety measures through hazard identification followed by consequence analysis in petrochemical plants. Consequence analysis was performed through practical release scenario by using PHAST RISK(ver. 6.7) software in the propylene recovery process(PRP). As results, consequences by fire or explosion accidents in the depropanizer zone, deethanizer zone and heat pump zone were relatively larger than other else zones among six process zones in the PRP. In the case of jet fire, it is recommendable not to install residence building within 200 m of the process zone. Additionally, process zones having large inventory or high pressure must be prevented from accidents and required to establish quick response against accidents.
Analysis of Correlation between the Hydrogen Embrittlement and the Small Punch Test for Hydrogen-charged Dual Phase Steels
Park, Jae-Woo ; Kang, Kae-Myung ;
Journal of the Korean Institute of Gas, volume 18, issue 1, 2014, Pages 61~67
DOI : 10.7842/kigas.2014.18.1.61
Small punch(SP) tests were performed on high strength Dual Phase(DP) steels in order to evaluate the behavior of hydrogen embrittlement. For this purpose, three different kinds of DP steel specimens were charged with hydrogen by electochemical hydrogen charging experiment. After charging with hydrogen, the amount of charged hydrogen was measured. The measurement results showed that amounts of charged hydrogen were largely dependent on the martensite volume fraction of DP steel. The hydrogen charging time of 25 hrs with current densities of 150 and
was investigated as saturation condition with hydrogen. The analysis results on the SP energy and height of SP bulbs after SP tests showed that those were decreased as the amount of charged hydrogen increased. Fractographs of SP bulbs were observed a brittle fracture mixed with quasi-cleavage fractures, layered structures and clear facets.
A Simple Vibration Model for the Imapct Response Analysis of a Helmet
Choi, Myung-Jin ;
Journal of the Korean Institute of Gas, volume 18, issue 1, 2014, Pages 68~74
DOI : 10.7842/kigas.2014.18.1.68
In this study, to analyze the impulsive response of a helmet, a simple vibration model is presented. Based upon the experimental data and the simulation results, an equivalent one degree of freedom vibrational system is adapted, and transient impulsive responses are analysed to investigate the influence of engineering parameters such as damping, natural frequency, and impact velocity on the impulsive response of the helmet. Maximum gravitational acceleration reduces as the damping factor value increases. When the damping factor value is around 0.6 or larger, the maximum acceleration does not change. With respect to the natural frequency and the impact velocity, it increases linearly. The relationship between head injury criterion(HIC) and maximum gravitational acceleration is also presented. The scheme of this study is expected to be utilized to economize the design process of high quality helmets.