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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 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
Development of Vortex Scrubber Using Electrolyzed Water for the Removal Efficiency Improvement of Minute Particles and Odor
Kim, Nor-Jung ; Lim, Seong-Il ; Kim, Sun-Mi ; Kim, Sun-Uk ; Kim, Lae-Hyun ; Kim, Sun ;
Journal of the Korean Institute of Gas, volume 14, issue 3, 2010, Pages 1~7
According to Indoor Air Quality(IAQ) management law for multi-use buildings, SEEONE CO., Ltd. made pilot and tested it to remove minute particle, odor, VOCs, etc. within the standards of IAQ. This pilot made by SEEONE CO., Ltd. is vortex scrubber washing electrolyzed water. As 30 minutes test result in multi-use building indoor place, minute particle(the smoke of a cigarette) was reduced
, gaseous contaminants was reduced Formaldehyde (HCHO) 20ppm
1ppm, Trimethylamine (
trace, Acetic acid (
2ppm and Acetone(
N.D. The pilot test result of the air filter using electroyzed water in vortex scrubber showed high removal efficiency. Because purified air maintain indoor humidity of approximately 40~60%, so users can feel pleasant. In E.coli, S.aureus sterilization test and CODcr, turbidity treatment test by electrolysis, germs was sterilized over 99.99% and CODcr and turbidity was decreased gradually. So water used for washing can be reused by electrolysis.
Measurements on the Propagation Characteristics of the Hydrogen Flame by Ultra Fine Thermocouple
Kim, Dong-Joon ;
Journal of the Korean Institute of Gas, volume 14, issue 3, 2010, Pages 8~13
Hydrogen is expected to become a new, clean source of energy for the next generation. Therefore, many studies have investigated the characteristics of the hydrogen flame. However, because the hydrogen flame has high temperature, the flame does not emit visible light, and the flame propagates at a high velocity, investigating its characteristics is difficult. In the present study, in order to simultaneously examine the flame temperature and flame propagation velocity of hydrogen/air mixtures, ultra fine thermocouples with diameters of 12.7, 25.4, and 50.8
are utilized. The results show that it is possible to detect the arrival time of the flame. Due to the temperature compensation with the time constants of thermocouples, it is also possible to estimate the flame temperature.
A Study on the Explosion Hazard by Spark Discharge of the Lithium-Ion Battery
Lee, Chun-Ha ; Jee, Seung-Wook ; Kim, Shi-Kuk ;
Journal of the Korean Institute of Gas, volume 14, issue 3, 2010, Pages 14~20
This paper was studied on the explosion hazard by spark discharge of the lithium-ion battery. The experimental samples were chosen lithium-ion battery(general, notebook) which were used for source of portable equipment. The IEC(International Electrotechnical Commission) type spark ignition test apparatus and experimental gases such as methane, propane, ethylene or hydrogen were used for explosiveness test. It was confirmed through the experiment that the explosion hazard by spark discharge. Also, it was used thermal imager for confirm that spontaneous ignition possibility by short-circuit. As the result, this paper verified that lithium-ion battery should be used and designed by special attention safety in the hazardous zone which is existed explosiveness gas.
Effect of Polyol Structure on the Physical Properties of Polyurethane Foam in Room and Cryogenic Temperature
Kim, Sang-Bum ; Kim, Chang-Bum ;
Journal of the Korean Institute of Gas, volume 14, issue 3, 2010, Pages 21~25
An objective of this study is to develop a polyurethane foam(PUF) maintaining its mechanical strength at room temperature as well as at extremely low temperature. The effect of temperature on the physical properties of PUF with the increase in polyol functionality was investigated. At room and cryogenic temperature, compressive strengths of the PUFs increased up to 70% and 30% with an increase in polyol functionality, respectively. At room temperature tensile strength of PUFs tends to increase as functionality of polyol increases, however, the strength at
shows different tendency. Compressive strength of PUF is higher in cryogenic temperature than in room temperature. However, as the number of polyol functionality become more than 4, tensile strength of PUF is lower in cryogenic temperature than in room temperature.
A Study on the Discrepancies of Gas Measurement and the Solution Measures between Suppliers and Consumers in South Korea
Park, Sang-Chul ; Bang, Sun-Hyuk ;
Journal of the Korean Institute of Gas, volume 14, issue 3, 2010, Pages 26~34
KOGAS, established in 1983 by law to ensure stable gas supply to the public, is responsible for the wholesale distribution to 30 city gas companies that deal with the retail distribution of natural gas in their geographic areas. The gas imported by KOGAS is measured by checking the level difference of LNG shipped in tankers before and after unloading. The analysis of gas composition is essential because the imported gas price is determined by its calorific value. The turbine meter is widely used for measuring the gas sold to city gas companies. Unlike the metering system for power plants, there is no gas chromatograph since the custody transfer of gas to the city gas companies is not billed by calorific value, but by volume basis. The gas quantity that a city gas company has bought from KOGAS is not equal to the quantity that the company sold to its customers. There have been some discrepancies between the wholesale gas meter readouts and retail ones due to some inherent errors of meters and some operational issues of the meters. This paper investigates the controversies regarding the real quantity of gas between distributors and consumers. It will discus and suggest desirable policies, both technically and economically, in order to solve the discrepancies of gas measurement.
A Study on VOCs Adsorption Properties Using Fine-fiber
An, Hyung-Hwan ;
Journal of the Korean Institute of Gas, volume 14, issue 3, 2010, Pages 35~40
This study is to develop of an adsorbent for the removing of human body harmful benzene, toluene, and p-xylene as VOCs. Thus, this study researched the adsorption efficiency of the commercial ACF and the reactivated ACF by KOH/ACF to molar 1: 1. As the results, the effects have shown to enlarge with the increasing of VOCs concentration for adsorptive breakthrough time and breakthrough percentage on each substance. Also, the study have investigated as a similar tendency in case of desorption efficiency for toluene and p-xylene at constant concentration as 125PPM and 0.5
/min volume flow rate. But in case of benzene, it has been investigated to have rather lower desorption efficiency re-activation ACF than commercial ACF.
Development of Direct DME Synthesis Process
Mo, Yong-Gi ; Cho, Won-Jun ; Baek, Young-Soon ;
Journal of the Korean Institute of Gas, volume 14, issue 3, 2010, Pages 41~45
The physical properties of DME(Dimethyl Ether) are very similar to LPG and well-mixed. As cetane number of DME is similar to diesel fuel that can replace diesel fuel and alternative energy. DME is a clean energy source that can be manufactured from various raw materials such as natural gas, CBM(Coal Bed Methane) and biomass. DME has no carbon-carbon bond in its molecular structure and its combustion essentially generates no soot as well as no SOx. The development of DME process in KOGAS have 4 section. First, syngas section can be manufactured various syngas ratio. This completes the tri-reforming process for the synthesis gas ratio of approximately 4.0 to 1.0 range can be adjusted. Second,
is removed from the
removal section of about 92~99%, so the maximum concentration of
entering the DME synthesis reactor should not exceed 8%. Third, in the DME synthesis section, if the temperature of DME reactor increases, the activity of DME catalyst increased. but for the long-term activity is desirable to maintain the proper temperature. Finally, the purity of DME in the DME purification section is over 99.6%.
A Numerical Study for the Scalar Dissipation Rate and the Flame Curvature with Flame Propagation Velocity in a Lifted Flame
Ha, Ji-Soo ; Kim, Tae-Kwon ; Park, Jeong ; Kim, Kyung-Ho ;
Journal of the Korean Institute of Gas, volume 14, issue 3, 2010, Pages 46~52
Flame propagation velocity is the one of the main mechanism of the stabilization of triple flame. To quantity the triple flame propagation velocity, Bilger presents the triple flame propagation velocity, depending on the mixture fraction gradient, based on the laminar jet flow theory. However, in spite of these many analyses, there has not been any attempt to quantify the triple flame propagation velocity with the flame radius of curvature and scalar dissipation rate. In the present research, there was discussion about the radius of flame curvature and scalar dissipation rate, through the numerical study. As a result, we have known that the flame propagation velocity was linear with the nozzle exit velocity and scalar dissipation rate decreases nonlinearly with the flame propagation velocity and radius of curvature of flame increases linearly. Also radius of curvature of flame decreases non-linearly with the scalar dissipation rate. Therefore, we ascertained that there was corelation among the scalar dissipation rate, radius of flame curvature and flame propagation velocity.