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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
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Volume & Issues
Volume 14, Issue 6 - Dec 2010
Volume 14, Issue 5 - Oct 2010
Volume 14, Issue 4 - Aug 2010
Volume 14, Issue 3 - Apr 2010
Volume 14, Issue 2 - Apr 2010
Volume 14, Issue 1 - Feb 2010
Selecting the target year
Numerical Analysis of Combustion and Heat Transfer of Domestic Gas Boiler Equipped with 2-stage Heat Exchanger
Kang, Seung-Kyu ; Choi, Kyoung-Suhk ; Kwon, Jeong-Rack ;
Journal of the Korean Institute of Gas, volume 14, issue 5, 2010, Pages 1~6
In this work, a numerical investigation is performed for the combustion chamber of domestic gas boiler with 1-stage and 2-stage heat exchangers. The fluid flow and heat transfer performance is simulated with a structure change of heat exchanger. The numerical solution shows that the heat transfer of the 2-stage heat exchanger is about 24% higher than that of the 1-stage heat exchanger, while the pressure loss of the 2-stage heat exchanger increases. The temperature of combustion chamber with 2-stage heat exchanger is lower than that of 1-stage. This effect reduces thermal NOx with decrease of high temperature staying time of the combustion gas.
Finite Element Analysis on the Stress and Displacement Behavior Safeties of Dome Roof Structures for a LNG Storage Tank
Kim, Chung-Kyun ;
Journal of the Korean Institute of Gas, volume 14, issue 5, 2010, Pages 7~12
This paper presents FE analysis on the stress and displacement behavior safeties of dome roof structures for a LNG outer tank, which is constructed by sets of H beams and reinforced concrete. The excitation force of 0.2g is applied at the center of the bottom concrete structure of an outer tank. The computed FEM results indicated that the maximum von Mises stress was shown at the edge of dome roof structure and the maximum displacement was produced at the center of dome roof. The results showed that the concentrated stress and displacement were steadily increased for an increased number of H beams. This means that the number of H beams does not critically affect to the safety of the dome roof structure because the stiffness of a reinforced concrete structure is much higher than that of H beams. Thus, the number of H beams may be restricted under 60 due to a dead weight of H beams for 0.2g excitation force.
A Study on the Integrated Control and Safety Management System for 9% Ni Steel LNG Storage Tank
Kim, Chung-Kyun ;
Journal of the Korean Institute of Gas, volume 14, issue 5, 2010, Pages 13~18
This paper presents the development of an integrated control and safety management system for 9% nickel steel LNG storage tank. The new system added the measuring equipment of pressure, displacement and force compared to the conventional measurement and control system. The measured data has simultaneously been processed by integrating and analyzing with new control equipments and safety management systems. The integrated control and safety management system, which may increase a safety and efficiency of a super-large full containment LNG storage tank, added additional pressure gauges and new displacement/force sensors at the outer side wall and a welding zone of a stiffener and top girder of an inner tank, and the inner side wall of a corner protection tank. The displacement and force sensors may provide failure clues of 9% nickel steel structures such as an inner tank and a corner protection, and a LNG leakage from the inner tank. The conventional leak sensor may not provide proper information on 9% nickel steel tank fracture even though LNG is leaked until the leak detector, which is placed at the insulation area between an inner tank and a corner protection tank, sends a warning signal. Thus, the new integrated control and safety management system is to collect and analyze the temperature, pressure, displacement, force, and LNG density, which are related to the tank system safety and leakage control from the inner tank. The digital data are also measured from control systems such as displacement and force of 9% nickel steel tank safety, LNG level and density, cool-down process, leakage, and pressure controls.
The Measurement and Estimation of Lower Flash Point for o-Xylene+n-Pentanol and m-Xylene+n-Hexanol Systems Using Tag Open-Cup Tester
Ha, Dong-Myeong ; Lee, Sung-Jin ; Jeong, Kee-Sin ;
Journal of the Korean Institute of Gas, volume 14, issue 5, 2010, Pages 19~25
The flash points for the systems, o-xylene+n-pentanol and m-xylene+n-hexanol, were measured by using Tag open-cup tester(ASTM D1310-86). The experimental data were compared with the values calculated by the Raoult's law and the optimization method using van Laar and Wilson equations. The calculated values based on the optimization method were found to be better than those based on the Raoult's law. The predictive curve of the flash point prediction model based on the van Laar equation described the experimentally-derived data more effectively than was the case when the prediction model was based upon the Wilson equation.
A Study on the Effect of New Technology for Gas Safety Management
Kim, Byung-Keun ; Ha, Tae-Young ; Cho, Hyun-Jung ;
Journal of the Korean Institute of Gas, volume 14, issue 5, 2010, Pages 26~31
This paper aims to analyze the effect of the introduction of new technology and education for gas safety on the prevention of gas accidents. For the purpose of a study, inspections, safety tests and training programs conducted by KGS were examined and the gas accident data, installation rate of safety devices and training, inspection data for last 20 years were also collected and then Multiple regression analyses were performed by using SPSS. The results showed that in both of City Gas and LPG system, the installation rate of fusecocks and training programs were statistically meaningful for reducing the gas accident rate.
A Study on the Vapor-Liquid Equilibria for the Binary Sustem of Carbon Dioxide and Ethane
Kim, Dong-Sun ; Cho, Jung-Ho ;
Journal of the Korean Institute of Gas, volume 14, issue 5, 2010, Pages 32~37
In this study, vapor-liquid equilibrium (VLE) data at several isothermal temperatures for carbon dioxide and ethane binary systems were estimated using binary interaction parameters (BIP's) in Peng-Robinson (PR) equation of state built-in PRO/II with PROVISION (PRO/II) process simulator. Moreover, BIP's in PR equation of state were newly determined by regressing the experimental VLE data for carbon dioxide and ethane systems for each different isothermal temperatures using the summation of squares of the bubble point deviations as an objective function. Comparative works have been performed for absolute average deviation % (AAD(%)) between experimental and predicted bubble pressures using built-in BIP's in PRO/II and newly regressed one, respectively. Our calculation results gave a better estimation result than the simulation result using an existing parameter built-in PRO/II.
The Quantitative Risk Analysis in Rail Transport of Propylene
Lee, Jae-Hean ; Song, Dong-Woo ; Lee, Su-Kyung ;
Journal of the Korean Institute of Gas, volume 14, issue 5, 2010, Pages 38~44
This treatise analyzed the risk of propylene transported by railroad through quantitative analysis. As a result of survey on propylene transportation route, Iksan station, Suncheon station and Jeonju station were selected as object regions those were expected to have high accident risks. This treatise deduced the scenario of accident and the occurrence rate in accordance with the type of accident possibly to be happening during propylene transportation through ETA( Event Tree Analysis), and expressed the level of personal, social risks after calculating the level of demage influencing over surroundings based on the evaluation for the expected accident damage through PHAST 6.53.