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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 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
A Study on the Evaporation and Distribution Velocity a Volatile Mixtures
An, Hyung-Whan ;
Journal of the Korean Institute of Gas, volume 18, issue 6, 2014, Pages 1~6
DOI : 10.7842/kigas.2014.18.6.1
This study is based on a investigation regarding the evaporation rate of a volatile liquid(methanol, tetrahydrofuran, xylene) according to changes of the temperature and wind. The weight of a volatile liquid was standardized to 24 g and the mixture was formed with the same weight ratio. In order to discover about the effect of the wind velocity, small fan was installed at 10 cm above the entrance and 30 cm away in the direction of the cylinder. The effect of the wind velocity was tested at 0 m/s, 1.63 m/s, 2.03 m/s respectively and the effect of the temperature on the volatile liquid was experimented at the temperature of
in the constant temperature water base. As a result, in case of Xylene, the evaporation rate of the tetrahydrofuran and methanol showed 1.4 mg/min, 19.8 mg/min and 10.2 mg/min respectively. Also, the effect of the evaporation rate on the temperature of the volatile liquid and on the velocity of wind was shown to be very sensitive. At the same time, the evaporation rate of the mixture showed large difference compared to that of the single volatile liquid.
A Study on the Cold Startability and Emission Characteristics of LPG Vehicle According to Test Temperature
Lee, Min-Ho ; Kim, Sung-Woo ; Kim, Ki-Ho ; Ha, Jong-Han ;
Journal of the Korean Institute of Gas, volume 18, issue 6, 2014, Pages 7~13
DOI : 10.7842/kigas.2014.18.6.7
As the interest on the air pollution is gradually rising up at home and abroad, automotive and fuel researchers have been working on the exhaust emission reduction from vehicles through a lot of approaches, which consist of new engine design, innovative after-treatment systems, using clean (eco-friendly alternative) fuels and fuel quality improvement. This research has brought forward various main issues : whether PM emissions should be regulated for diesel and gasoline vehicles and whether gasoline and LPG powered vehicles can be further neglected from PM emission inventories. Finally, the greenhouse gas (
) regulation has been discussed including automotive emission regulation. The greenhouse gas and emissions (PM) particle of automotive had many problem that cause of ambient pollution, health effects. This paper discussed the influence of LPG fuel on automotive cold startability and exhaust emissions gas. Also, this paper assessed emission characteristics due to the test temperature. These test temperature were performed by dividing the temperature of the test mode and the lowest local temperature in winter. Through this study, the correlation of cold startability, exhaust emission and greenhouse gas emission was analyzed.
A Study on Piping Support Design Process in Plant Piping System
Chung, Chulsup ;
Journal of the Korean Institute of Gas, volume 18, issue 6, 2014, Pages 14~20
DOI : 10.7842/kigas.2014.18.6.14
In this study, the stress analysis for the piping support design is performed as per the rules of the ASME Code, Section III, subsection NF-Component Support which provides a simplified method of design analysis for piping support. This method makes use of simple equations and conservative allowable stress limits for design and service loadings. For the base plate, code equation is satisfied within the allowable limits. Both anchor bolts and pipe strap are governed by the their interaction equations. The stresses resulting from various loadings and their combinations are within the allowable limits specified in the above mentioned ASME Code. Thus, it was proved that the structural integrity of the pump assembly was satisfactory.
Study on the Performance of an SI Gas Engine by Fuel Composition and Spark Plug Variation
Kim, Yongrae ;
Journal of the Korean Institute of Gas, volume 18, issue 6, 2014, Pages 21~26
DOI : 10.7842/kigas.2014.18.6.21
Renewable gas fuels such as biogas and landfill gas have carbon-neutral nature which can reduce carbon dioxide. However, it is necessary to make stable combustion when this fuel is used in power generating SI(spark ignition) gas engines due to its low heating value and non-uniformity. In this study, it was shown that addition of hydrogen can increase combustion stability of gas engine which is running with high inert gas composition. Thermal efficiency and emission characteristics of this engine was also investigated. In addition, a new spark plug with a long electrode was tested and compared with a base spark plug as a way to improve engine efficiency and reduce exhaust emissions.
A Study on the Strength Safety of Valve Structure for LPG Cylinder
Kim, Chung Kyun ;
Journal of the Korean Institute of Gas, volume 18, issue 6, 2014, Pages 27~31
DOI : 10.7842/kigas.2014.18.6.27
This paper presents a study on the strength safety of the weak parts at Part 1, Part 2 and Part 3 in the valve structure for LPG cylinder by using the finite element method. The maximum Von Mises stress of 27.5MPa was occurred at the corner edge of a valve Part 1 for the valve thickness of 1.5mm and LPG pressure of 3.5MPa. And the maximum Von Mises stresses for the valve thickness of 1.5mm and LPG pressure of 3.5MPa were 41.5MPa at Part 2 and 46.5MPa at Part 3. The FEM computed results show that the maximum Von Mises stresses at Part 1, Part 2 and Part 3 are very low value of 9.2~15.5% compared with the yield strength of a copper alloy, C3604. This means that the valve thickness for LPG cylinder is so over designed for the conventional valve. Thus, this paper recommends that the thickness at Part 1 and Part 2 is reduced for a light weight of a copper valve. But, the thickness at Part 3 may be better for a thick valve as a conventional valve for high torque strength.
A Study on the System Design of Chemical Process using Quantitative Risk Assessment Methodology
Byun, Yoon Sup ;
Journal of the Korean Institute of Gas, volume 18, issue 6, 2014, Pages 32~39
DOI : 10.7842/kigas.2014.18.6.32
To ensure the reliability of the safety system so that handing large quantities of hazardous materials in chemical plant is considered basic information in chemical process design. However, the reliability of the production system may be reduced when the reliability of the safety system emphasized in order to ensure the safety of chemical process. It is necessary to balance the reliability of the production system and reliability of the safety. In this study, a quantitative risk assessment was performed by selecting the furnace process, which is widely used in the chemical plant in order to suggest a way to ensure the safety and productivity of chemical process, based on the quantitative data. Quantitative risk assessment methodology have been used directed graph analysis methodology. It is possible to evaluate the reliability of the safety system and the production system. In this study, the optimum system design requirement to improve the safety and the productivity of the furnace is two-out-of-three logic for TT and PT.
Shape Change Analysis of a Small Propane Container by Pressure Test
Lee, Jong-Sang ; Jang, Kap-Man ; Lee, Yoon Hyoung ; Yim, Sang-Sik ; Lee, Jin-Han ;
Journal of the Korean Institute of Gas, volume 18, issue 6, 2014, Pages 40~44
DOI : 10.7842/kigas.2014.18.6.40
In this study, it is analyzed that a change in the shape of small propane containers made of STS304 when increasing of internal pressure. When internal pressure of a small propane container increased, bottom of end plate is convexly changed. This test is applied to a water bath pressure test to analyze the characteristics of the container. Water bath is able to analyze relationship between internal pressure and volume. In result, shape change section is confirmed because bottom of end plate is convexly changed. In addition, this section tend to decrease internal pressure because a volume increment increase out of proportion to pressure. The results of this study are expected to contribute to improving the safety of the pressure vessel, as well as various small propane container.
A Study of Pin-Pinion Tooth Profile Applied with Cycloid Tooth Profile
Ham, Seong-Hun ; Youm, Kwang-Wook ;
Journal of the Korean Institute of Gas, volume 18, issue 6, 2014, Pages 45~50
DOI : 10.7842/kigas.2014.18.6.45
In this paper, designed the driving part of a straight line precision transfer system which can be applied to industrial machines and industrial robots. The direction of power transfer and the output characteristic are similar to those of the conventional rack-pinion type, but it applied new pin-pinion type to the driving part. As a result, it achieved indefinite expandability in length and secured the convenience of installation. To determine the optimal contact of pin-pinion gear, it conducted a Cycloid tooth profile analysis.