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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 12, Issue 4 - Dec 2008
Volume 12, Issue 3 - Sep 2008
Volume 12, Issue 2 - Jun 2008
Volume 12, Issue 1 - Mar 2008
Selecting the target year
A Study on Integrated Safety Management System of LNG Storage/Transport Facilities
Lee, Sang-Ho ; Lim, Young-Sub ; Han, Chong-Hun ;
Journal of the Korean Institute of Gas, volume 12, issue 3, 2008, Pages 1~6
The safety management of the LNG industry which shows huge growth recently, become an essential element. So the necessity of development for the pre-existing LNG storage/transport facility has been shown up and the improvement of information technology (IT) of these days make it possible to synthesize several models for integrated LNG facilitiy safety management system. This system will contains risk analysis/assessment technology, explosion, leakage and diffusion model construction technology, real-time monitoring and fault diagnosis technology, and reliability progression technology of process information through data reconciliation. The final integrated safety management system will contribute the increase of LNG industry's safety and exportation of technique.
Combustion Characteristics Study of an SI Engine Operated with DME Blended LPG Fuel
Lee, Seok-Hwan ; Oh, Seung-Mook ; Choi, Young ; Kang, Kern-Yong ; Choi, Won-Hak ; Cha, Kyoung-Ok ;
Journal of the Korean Institute of Gas, volume 12, issue 3, 2008, Pages 7~12
In this study, a spark ignition engine operated with the DME blended LPG fuel was investigated experimentally. Performance, emissions characteristics including hydrocarbon, CO, NOx, and combustion stability of an SI engine fuelled with DME blended LPG fuel were examined at
. Results showed that stable engine operation was possible for a wide range of engine loads within 20% mass content of DME fuel. Also, engine output power within 10% mass content of DME fuel was comparable to that of pure LPG fuel operation. However, engine output power was decreased and break specific fuel consumption (BSFC) was severely increased with the amount of blended fuel as the energy content of DME was much lower than that of LPG. DME blended LPG fuel is expected to be potential for enlarging DME market.
A Study on Knocking Characteristics of a 300 kW Class CNG Engine for CHP
Kim, Chang-Gi ; Kim, Young-Min ; Lee, Jang-Hee ; Roh, Yun-Hyun ; Ann, Tae-Keun ;
Journal of the Korean Institute of Gas, volume 12, issue 3, 2008, Pages 13~19
Among the various prime movers for combined heat and power (CHP) system, the CNG engine is the most commonly used power generation equipment of which power is less than 1MW. The 300 kW class CNG engine for CHP can meet stringent emission regulations with the adoption of stoichiometric air-fuel ratio control and three way catalyst. As the thermal efficiency of the stoichiometric ratio engine is lower than that of lean burn engine, it is necessary to operate the stoichiometric engine at its minimum spark advance for the best torque (MBT). However, knock control should be introduced for the engine under high intake air temperature conditions because MBT operating conditions are generally very close to those of knock occurrence. In this study, engine performances and knocking characteristics were experimentally investigated for the CNG engine that needs to be operated at higher intake air temperature conditions than normal conditions.
The Reformation of Gas Technical Standards System
Hur, Young-Taeg ; Lim, Ha-Kyung ; Lee, Su-Kyung ;
Journal of the Korean Institute of Gas, volume 12, issue 3, 2008, Pages 20~23
The current gas regulations have been reformed into a new technical standards system called as "KGS (Korea Gas Safety) Code" system. Korea Gas Safety Corporation has developed a new framework of technical standards classification method and will manage the new technical standards system in compliance with the mandatory requirements of gas regulations. This study will cover an overall view of the reformation and show "KGS Code" in detail.
A Study on the Optimized Design of the Helmets for Fire and Gas Safety
Cho, Seung-Hyun ; Kim, Do-Hyun ; Kim, Chung-Kyun ;
Journal of the Korean Institute of Gas, volume 12, issue 3, 2008, Pages 24~30
In this paper, the stress and strain characteristics of a helmet shell structure have been analyzed by using the finite element method and Taguchi's design method as functions of the material properties, the thickness of a helmet, the thickness and the number of a bead frame. The optimized design of the helmets for a firefighter and a gas worker is very important for increasing the strength safety and an impact energy absorption capacity of a helmet shell due to an impulsive external force. Thus, the optimized design data of the helmet indicated that the uniform thickness of a helmet shell may be reduced for reducing the total weight of a helmet and increasing the strain energy absorption rate, but the thickness and the number of a bead frame would be increased for increasing the impact strength of the helmet.
A Study on the Strength Analysis of the Helmets for Fire and Gas Safety
Kim, Han-Goo ; Shim, Jong-Hyun ; Kim, Chung-Kyun ;
Journal of the Korean Institute of Gas, volume 12, issue 3, 2008, Pages 31~37
In this paper, the strength analysis has been presented for the stress and strain by using the finite element method for various shell models of the helmets. The advanced helmet that would provide head protection without causing discomfort to the user when it was worn for long periods of time should be manufactured for increasing the safety and workability of the workers. We need a safe, comfortable and light weight of the helmet shell structure. Thus, the helmets had to stand up to the most rigorous conditions encountered for the fire and gas explosion. The FEM computed results show that when the impulsive force is applied on the summit area of a helmet shell structure, the maximum stress and strain have been occurred around the position of an applied impact force, which may lead to the initial failure on the summit of the helmet shell. Thus, the summit area of the helmet shell should be supported by a bead frame and increased thickness of the bead. But the overall thickness of the helmet is to decrease for the light weight of a helmet.
Effect of Polyester Polyol and NCO Index to the Physical Properties of Polyurethane Adhesives in Cryogenic and Room Temperature
Kim, Sang-Bum ; Cho, Il-Sung ; Kang, Sung-Gu ;
Journal of the Korean Institute of Gas, volume 12, issue 3, 2008, Pages 38~42
Effect of polyol structure and NCO index on adhesion of PU adhesive at room (
) and extremely low temperature (
) was investigated. At room temperature adhesive strength of PU adhesive tends to decrease as molecular weight of polyol increases, however, the strength at
shows opposite tendency. Adhesive strength of the PU turned out to be directly proportional to the amount of MDI. PU containing aliphatic polyol was higher in shear strength at
and the strength of PU with aromatic polyol was higher at room temperature.
Experimental Study for Evaporation Heat Transfer and Pressure Drop of R-22 and R-407C in an Inner Diameter of 4.3 mm and 6.4 mm
Son, Chang-Hyo ; Roh, Geon-Sang ;
Journal of the Korean Institute of Gas, volume 12, issue 3, 2008, Pages 43~49
The evaporation heat transfer coefficient and pressure drop of R-22 and R-407C in horizontal copper tubes were investigated experimentally. The main components of therefrigerant loop are a receiver, a compressor, a mass flow meter, a condenser and a double pipe type evaporator (test section). The test section consists of a smooth copper tube of 4.3 mm and 6.4 mm inner diameter. The refrigerant mass fluxes were varied from 100 to
and the saturation temperature of evaporator were 5 [
]. The evaporation heat transfer coefficients of R-22 and R-407C rise with the increase in mass flux and vapor quality. The evaporation heat transfer coefficient of R-22 for inner diameter tube of 4.3 mm and 6.4 mm is about
higher than that of R-407C, respectively.
The Measurement and Estimation of Minimum Flash Point Behavior for Binary Mixtures Using Tag Open-Cup Tester
Ha, Dong-Myeong ; Lee, Sung-Jin ;
Journal of the Korean Institute of Gas, volume 12, issue 3, 2008, Pages 50~55
The flash points for the systems, ethlybenzene+n-butanol and ethlybenzene+n-hexanol, were measured by using Tag open-cup tester (ASTM D1310-86). These binary mixtures exhibited MFPB (minimum flash point behavior), which leads to the minimum on the flash point vs composition curve. The experimental data were compared with the values calculated by the Raoult's law, the UNIQUAC equation and the NRTL equation. The calculated values based on the UNIQUAC and NRTL equations were found to be better than those based on the Raoult's law. It was concluded that the UNIQUAC and NRTL equations were more effective than the Raoult' law at describing the activity coefficients for nonideal solution such as the ethlybenzene+n-butanol and ethlybenzene+n-hexanol systems. And the predictive curve of the flash point prediction model based on the NRTL equation described the experimentally-derived data more effectively than was the case when the prediction model was based upon the UNIQUAC equation.
Constructing a Database Structure for the Domestic LP Gas and Natural Gas Accidents and its Analysis
Ko, Jae-Sun ; Park, Sun-Young ; Kim, Hyo ;
Journal of the Korean Institute of Gas, volume 12, issue 3, 2008, Pages 56~63
We have garnered 3,593 data of gas [Natural Gas (NG) and Liquefied Petroleum Gas (LPG)] accidents reported for 16 years from 1991, and then analyzed the accidents according to their types and causes based on the classified database. According to the results the gas leak has been the most common accident followed by the explosion and then fire accidents. The most frequent accident-occurring locations for fire, explosion and leak are recognized around the valve, hose and pipeline, respectively. In addition, we have applied the Poisson analysis to predict the most-likely probabilities of fire, explosion and release in the upcoming 5 years. From this research we have assured the successive database updating will highly improve the anticipating-probability accuracy and thus it will play a key role as a significant safety-securing guideline against the gas disasters.
Development of Rechargeable High-pressure Gas Valve (Capability of Valve to Drainage)
Kwon, Kyung-Ok ;
Journal of the Korean Institute of Gas, volume 12, issue 3, 2008, Pages 64~67
The valve applied air pressure type of high pressure packing is developed to prolong the lifetime and to enhance the airtight. The effective valve developed enables to get remove the remaining pressure through the part of valve in handle so that a separate valve to drain is no need. The character of valve developed in this experiment is high packing of valve through special form and having drain hole in stem that enables a drainage regardless the status of vale is closed or opened.
Measurements on Effects of Locations of Obstacles in an Explosion Chamber
Han, Jae-Beom ; Lee, Young-Soon ; Park, Dal-Jae ;
Journal of the Korean Institute of Gas, volume 12, issue 3, 2008, Pages 68~74
Measurements were performed to investigate the effects on flame and pressure development by varying locations of multiple obstacles in a top-venting explosion chamber. The chamber dimension was 1000 mm in height with a
cross-section and a rectangular vent area of
. Three different multiple obstacles with blockage ratio of 30% were used by changing from 200 mm, 500 mm to 800 mm in heights within the chamber. Temporally resolved flame front images were recorded by a high speed camera to investigate the interaction between the propagating flame and the obstacles. The results showed that the triangular bar caused the fastest flame developments at given times whereas the lowest was obtained with the cylindrical bar. It was also found that local flame displacement speeds of different obstacles were sensitive to the locations of obstacles. The local speed becomes larger in going from 200 mm, to 500 mm and to 800 mm in heights. The obstacles in height of 800 mm yielded the highest overpressure whereas the lowest was in height of 200 mm.
A Study on the Improvement of the Standards of Backfill Materials for Underground Pipelines Carrying Natural Gas
Ryou, Young-Don ; Kwak, Che-Sik ; Ryu, Young-Jo ; Lee, Su-Kyung ;
Journal of the Korean Institute of Gas, volume 12, issue 3, 2008, Pages 75~80
According to the Integrated Notice on City Gas Safety Management Standards, materials for bedding and foundation which are around the pipe should be sands or fine grade soil without large particle that is more than 19 mm size. However, sands are mostly used at gas pipeline construction sites and this causes a shortage of sands and an increase of construction costs. It even causes the disruption of natural environment. In order to improve the standards of backfill material, we have researched regulations in other countries and investigated the pipeline construction sites to survey the present state of backfilling. We also have studied what the bedding and foundation materials affect on buried gas pipelines. Lastly, we have suggested suitable materials for bedding and foundation besides sands. We are sure this paper help the government amend the Notice about backfill materials.
An Experimental Study on Thermal Efficiency Characteristics with Propane-DME Mixture Ratio for Residential Gas Range
Ahn, Jae-Uk ; Hwang, Hyun-Cheol ; Kim, Young-Gyu ; Kwon, Jeong-Rock ;
Journal of the Korean Institute of Gas, volume 12, issue 3, 2008, Pages 81~84
In this paper, the research was applied the mixture gas of Propane-DME (dimethyl ether) for being commercialization to residential gas ranges. In order to examine a correspondence between Korean Standard and thermal efficiency characteristics at each burner, experiments were performed with 100% Propane and the mixture gas of 80% Propane-20% DME. The experimental results were shown that the higher a mixture ratio of DME was used, the lower a thermal efficiency was gained. Those were due to low caloric value of DME. With 80% Propane-20% DME mixture gas, one of residential gas ranges was not satisfied the condition for the thermal efficiency value, 40%, Korean Standard. Consequently, the research needs about the standard for being commercialization to the mixture gas of Propane-DME.