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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 10, Issue 4 - Dec 2006
Volume 10, Issue 3 - Sep 2006
Volume 10, Issue 2 - Jun 2006
Volume 10, Issue 1 - Mar 2006
Selecting the target year
A Statistical Model for Predicting Incipient Point and Quantity of Gas Condensate in Gas Pipelines
Chang, Seung-Yong ;
Journal of the Korean Institute of Gas, volume 10, issue 4, 2006, Pages 1~5
With the rapid increase in gas consumption, the role of pipelines as a transportation means of natural gas is increasing. In general, when natural gas is being transported in pipelines, some liquid mainly from formation of condensate is introduced and this phenomenon makes operational problems more complex in the gas industry. Thus, an appropriate method is necessary for predicting the effect of presence of gas condensate on operational efficiency. In this study, a statistical model was developed using an integrated single- and two-phase flows concept. Using this model, the effects of the incipient point of gas condensate and its quantity on outlet pressure were analyzed. Also, the effect of variations of flow regimes in two-phase region on outlet pressure after the incipient point was analyzed.
Estimation of Physical Properties of Natural Gas Using Cubic Equations of State
Cho, Jung-Ho ; Cho, Kyu-Sang ; Kim, Dong-Hyeok ; Lee, Young-Chul ; Hong, Sung-Ho ;
Journal of the Korean Institute of Gas, volume 10, issue 4, 2006, Pages 6~10
In this study, gross heating value(GHV), density, vapor pressure and heat capacity of natural gas were estimated and their experimental data were compared with calculated ones, SRK method. A new alpha function was used to predict the vapor pressures of pure component of the natural gas constituents well instead of calculating vapor pressures with acentric factors. And binary adjustable parameters were determined by regressing binary vapor-liquid equilibria data. Through this study, our results showed good agreements with experimental data.
An Analysis of Greenhouse Gas Emission and Role of Gas Generation in Electric Sector
Kang, Hee-Jung ;
Journal of the Korean Institute of Gas, volume 10, issue 4, 2006, Pages 11~16
The purposes of this study is to develop a domestic MARKAL(MARKet ALlocation) model with construction of database system to find the technology mix for the electricity generation market in Korea. The MARKAL model is officially used for national energy system optimization in the International Energy Agency(IEA), and the role is becoming more important in relation to analyze the greenhouse gas mitigation potential and to evaluate the technologies. Four scenarios specially emphasized on the greenhouse gas reduction and technology mix of electric generation were applied, each of them covering the analysis periods between 2004 and 2040.
A Study on the Cross Subsidization of Energy Industries in Korea
Chung, Hee-Yung ; Kang, Hee-Jung ;
Journal of the Korean Institute of Gas, volume 10, issue 4, 2006, Pages 17~22
Both of district heating(DH) system and natural gas(NG) supply system have benefits in clean energy supply and having energy efficiency and savings. The issue of duplicate investment and supply requirement of only for cook occur several conflicts such as destruction of the Beneficiary Pays Principle and Cross Subsidization, etc. Under the circumstance, the purposes of this research are to consider several issues of cross subsidization in NG and DH industries and to present the following alternatives for resolving related problems. First of all, a charging mechanism in the energy cost must be improved so as to maintain the positive relation between cost and benefit. That is, the beneficiary-pay principle must be strictly applied. Secondly, the extended supply of DH through HOB(Heat Only Boiler) must be strictly limited. Finally, we need to improve efficiency for the benefit of market participants.
Optimization Design of a Gas Valve for a LPG Cylinder Using a Taguchi's Experimental Method
Kim, Chung-Kyun ; Oh, Kyoung-Seok ;
Journal of the Korean Institute of Gas, volume 10, issue 4, 2006, Pages 23~28
This paper presents the strength safety and the weight reduction analysis of nine gas valve models for a LPG cylinder using a finite element analysis program, MARC and Taguchi's experimental method. The maximum Von Mises stress of a gas valve body represents a safety of a brass valve structure for the given gas pressure of
, which considered a safety factor of a LPG gas cylinder. The weight reduction analysis is very important for reducing a gas flow friction loss and a manufacturing cost as a design parameter. The calculated results present an design model 9 as an optimized design data with 10mm radius of a lower part gas flow pipe A, 6mm radius of an upper part gas flow pipe B and a connecting length 2 mm of tapered pipe D between lower and upper pipes.
Prediction of Flash Point of Binary Systems by Using Multivariate Statistical Analysis
Lee, Bom-Sock ; Kim, S.Y. ; Chung, C.B. ; Choi, S.H. ;
Journal of the Korean Institute of Gas, volume 10, issue 4, 2006, Pages 29~33
Estimation of process safety is important in the chemical process design. Prediction for flash points of flammable substances used in chemical processes is the one of the methods for estimating process safety. Flash point is the property used to examine the potential for the fire and explosion hazards of flammable substances. In this paper, multivariate statistical analysis methods(partial least squares(PLS) quadratic partial least squares(QPLS)) using experimental data is suggested for predicting flash points of flammable substances of binary systems. The prediction results are compared with the values calculated by laws of Raoult and Van Laar equation.
A Study on the Integrated Fusion Technology Between a Carbon Dioxide Emission and a District Cooling Energy Using a Cold Energy
Kim, Chung-Kyun ;
Journal of the Korean Institute of Gas, volume 10, issue 4, 2006, Pages 34~40
This paper provides a fusion technology between a district cooling energy system and an environment conservation policy based on the energy savings and reusable cold energy resources. The district heating and cooling systems are very effective ways for an energy saving, a cost reduction and a safety control. It is necessary to equalize the energy savings and an environmental preservation policy for an improved human lift. A gasification process of a liquefied natural gas, cooling water from deep seawater and an ice water thermal storage system may produce a cold energy. A district cooling system is used to cool an apartment, office buildings and factory facilities with a cooling energy supply pipeline. LNG cooling energy will switch a conventional air-conditioning system, which is operated by on electrical energy and a Freon refrigerant. Coincident with significant clean energy and operating cost savings, LNG cold energy system owen radical reductions in an air-borne pollutant,
and the release of environmentally harmful refrigerants compared with that of the conventional air-conditioning system. This study provides useful information on the fusion technology of a LNG cold energy usage and energy savings, and environmental conservation.
A Study on Method of Decreasing Accident of Propulsion System according do LOX Contamination
Yu, Byung-Il ; Bershadskiy, V.A. ; Kim, Sang-Heon ; Lee, Jung-Ho ; Kim, Yong-Wook ; Oh, Seung-Hyub ;
Journal of the Korean Institute of Gas, volume 10, issue 4, 2006, Pages 41~46
A study was conducted to investigate the problem caused by the mechanical particles in LOX system during operating and testing propulsion system, especially concentrated on effects of contaminants accumulation and transfer in LOX system. Several methods for system operation decreasing accidents caused by oxidizer Beakage and contaminants accumulation was investigated. These methods can be applied to LOX system and other propellants system in liquid propellants propulsion system.
The Investigation of Accidental Case for LNG Terminal
Ma, Y.W. ; Lee, S.R. ; Yoon, K.B. ;
Journal of the Korean Institute of Gas, volume 10, issue 4, 2006, Pages 47~51
Safety issues for LNG(Liquified Natural Gas) terminal or LNG tank involve various concerns such as production/transportation at cryogenic temperature of
, large volume of handling, flammability and explosion risk. Hence, in designing an LNG terminal rigid safety criteria and mandatory requirements are unavoidable. Since known cases of LNG related accident are very few, careful study and root cause analysis of them are very important and provide precious information to increase safety level of the LNG terminal. In this paper most key accident cases were gathered and analysed to understand fundamental safety issues of LNG terminal to prevent further accident.
Selection of Release Scenario and Consequence Analysis for Gas Explosion by Pipe Release
Kim, Tae-Ok ; Lee, Hern-Chang ; Ryoo, Jun ;
Journal of the Korean Institute of Gas, volume 10, issue 4, 2006, Pages 52~62
In this study, we tried to propose a selection method of release scenarios and a method of consequence analysis at a gas explosion by pipe release. Thus, release rates, damage areas of the facilities, and fatality areas were estimated and analyzed at various release conditions(temperature, pressure, release material, etc). As a results, we could conclude that the rupture was the worst case of release scenarios, and at release rates and damage areas were better estimated by the weighted average method considering a generic failure frequency of the release hole than by an arbitrary selection of the release hole.
Qualitative Hazard Analysis for LNG Gas Stations Using K-PSR Method
Ko, Jae-Wook ; Lee, Jae-Min ; Yoo, Jin-Hwan ;
Journal of the Korean Institute of Gas, volume 10, issue 4, 2006, Pages 63~69
With the increased interest in reducing air pollution, supply of natural gas for gas vehicles is increasing. Thus, the number of establishments of LNG and CNG stations is increasing as well. However, due to major gas accidents such as the fire and explosion accident of a Bucheon LPG station in 1998, it is difficult to establish a new station. In this research, we conducted qualitative hazard analysis fer LCNG/LNG multi-station by using the K-PSR method and proposed recommendations for hazard mitigation.