• Title/Summary/Keyword: LPG leakage

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A Study on Calculation of Leakage for LPG Explosion Accident using 3D Scan and CFD (3D 스캔과 CFD를 활용한 LPG 폭발사고의 누출량 산정에 관한 연구)

  • Cho, Wan Su;Kim, Eui Soo
    • Journal of the Korean Society of Safety
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    • v.33 no.3
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    • pp.1-7
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    • 2018
  • Recently, various engineering approaches have been widely used in the accident investigation field to identify the cause of the accident and to predict damage by accident. Computational analysis is the most commonly used method of accident investigation technique. This technique is mainly used to identify the mechanism of the accident generation and to determine the cause when it is difficult to reproduce the situation at the time of the accident or when it is impossible to perform a reproduction experiment. In this study, The gas explosion analysis for LPG explosion accident generated by defect of the blocking action was performed to determine the accident object, gas leakage amount and predicted the damage caused by the accident using 3D laser scanner and FLACS program. We can quantify the explosive power by LPG gas accident and predict the gas leakage amount, damage by accident and evaluate the stability of the structure through this study. In the future, This method can be widely used in the field of gas safety by improving the reliability and validity of the analysis.

A Study on the Risk Assessment in LPG Transportation by Tank Lorry (LPG 탱크로리 수송중 위험성 평가에 관한 연구)

  • 이재준;김윤화;윤성렬;엄성인;백종배;고재욱
    • Journal of the Korean Society of Safety
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    • v.12 no.4
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    • pp.86-92
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    • 1997
  • Demand of LPG and LNG will increase continuously due to high calories, clearness, and convenience for usage. These gases are used widely for power plants, industrial plants, and domestic fuel. But accidents related with gas are increasing in proportion to increment of gas usage. Especially LPG has high ignitability due to weak dispersion to air and accumulation at low place because LPG is heavier than air. There are many hazards during transportation as well as production, storage, and usage of LPG. Commonly, tank lorry is used for inland transportation of LPG. If tank lorry were to raise leakage incidents and then LPG released during transporting, the accidents cause serious effects on the environment as well as human damage of surrounding area. In this study, therefore, hazards which cause LPG of tank lorry to leak during transportation were identified and risk of LPG transportation was assessed quantitatively. Also, the result of this study might be a useful measure for predicting damage and preparing safe transportation strategies of LPG tank lorry.

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LPG Cylinder Leak Experiment from Multiple Leak Scenarios (누출종류에 따른 LP가스용기 누출량 실증 실험)

  • Lee, Minkyung;Lee, Kang-Ok;Kim, Young Gyu
    • Journal of the Korean Institute of Gas
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    • v.23 no.6
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    • pp.61-66
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    • 2019
  • Unlike NG supplied through pipes, LPG is mainly used for independent storage of cylinders or small storage tanks. As LPG is widely used in islands and underdeveloped areas, accidents due to neglect of safety management are high. Houses and businesses that have LPG accidents are likely to be damaged due to relatively high population density. Therefore, the necessity of strengthening the safety management of LPG is constantly raised. Accordingly, in 1996, Korea Gas Safety Corporation conducted an LPG leak test. In this study, based on the 96-year experiment, the gas leakage measurement of LPG vessels was conducted by adding several conditions such as outside temperature and pipe condition. Through this, the trend of leakage for various scenarios of LPG leakage was examined. In the case of a gas leak, when the article which may affect the pressure such as a regulator is not connected, the leakage amount is greatly changed by the outside air temperature, and when the regulator is fastened, the influence of the outlet pressure is large. It is expected that the experiment can be used as basic data for determining gas accidents and leakages that may occur later.

A Comparative Study on the Safety Management Status of LP Gas Fueled Vehicles in Korea and Foreign Countries (LP가스 연료사용 자동차의 국내외 안전관리현황 비교 연구)

  • Tak, Song-Su;Lee, Su-Kyung
    • Journal of the Korean Institute of Gas
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    • v.13 no.2
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    • pp.49-56
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    • 2009
  • This thesis suggests ways for ensuring the safety of domestic autogas (liquefied petroleum gas) vehicles by conducting comparison and analysis on the status of market diffusion and safety management scheme in foreign countries as well as in Korea. According to the result of the survey on the status of domestic autogas safety management, the national scheme to secure the safety of autogas vehicles seems neither well-organized nor sufficiently-controlled. Actually, the gas leakage check-ups conducted for 5,000 autogas cars revealed that about 4 percent of them had leakage problems. As a result, it was acknowledged that the autogas safety regulations being operated in advanced countries need to be selectively introduced for the domestic autogas industry. Consequently, in line with the recent permission to use autogas as a fuel for subcompact cars etc., this thesis is recommending some methods to enhance the safety management scheme for autogas cars such as the amendment of facility regulations including the ventilation of underground parking lots, mandatory attachment of labels claiming autogas cars and indicating periodical inspections etc.

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Validity of solar energy generation at the underused Space of LPG filling station (LPG충전소 유휴공간의 태양광발전설비 설치 유효성)

  • Lee, Minkyung;Kim, Jeonghwan;Lee, Jinhan;Joe, Youngdo;Lee, Yeonjae
    • Journal of the Korean Institute of Gas
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    • v.20 no.4
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    • pp.25-32
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    • 2016
  • The purpose of this study is safety evaluation of solar energy generation which is installed on the canopy at the LPG filling station. in case of a gas station, the solar energy generation was become legalization through a related law reform in 2008. Also, in case of a LPG filling station, the solar energy generation was become legalization through a related law reform in 2015. So, the related law that KGS CODE and Safety control of dangerous substances law and the case of installed solar energy generation in gas, LPG filling station was investigated. two scenarios are supposed for the CFD. Release of safety valve pipeline and ruptured dispenser leakage are the scenarios. The FLACS which developed GexCon in Norway was used for simulation. LPG dispersion to the upper side of canopy was very small with safety distance.

A Study on the Exhaust Emissions Characteristics of LPG Vehicle using LPG Fuel with Sulfur Free Odorant (비황분계 부취제를 혼합한 LPG 연료의 차량 배출가스 특성에 관한 연구)

  • Kim, Jae-Kon;Lee, Ho-Kil;Yim, Eui Soon;Jung, Choong-Sub
    • Journal of Korean Society for Atmospheric Environment
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    • v.30 no.6
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    • pp.545-554
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    • 2014
  • In general, odorant was added to fuel gases, such as LPG, LNG and city gas, to prevent gas poisoning, ignition, explosion, or other accident caused by fuel gases, and to enable immediate and easy detection of fuel-gas leakage by emitting an offensive smell. This study describes a study on the exhaust emissions characteristics and fuel economy of liquefied petroleum gas (LPG) vehicle using LPG fuel with new sulfur free odorant. New sulfur free odorant was added to LPG to reduce sulfur content of the LPG. Its performance and exhaust emission were compared to those of LPG with sulfur containing odorant (EM, ethyl mercaptan). Engine performance using LPG with sulfur free odorant was similar to that with sulfur-containing odorant. Exhaust emissions from the LPG vehicle with LPG including sulfur free odorant were also similar to those with LPG including sulfur containing odorant in the FTP 75 and NEDC mode. There experimental results suggest that the sulfur free odorant may substitute for the sulfur containing odorant in LPG fuel.

Reaction Characteristics of LPG Fuel and Rubber Parts of Fuel Supply System in Liquid Phase LPG Injection (LPLi) System (LPG액상분사식(LPLi) 엔진에서 연료와 연료공급계통 고무류 부품사이의 반응성 연구)

  • Kim, Chang-Up;Park, Cheol-Woong;Kang, Kern-Yong
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.33 no.4
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    • pp.272-277
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    • 2009
  • The liquid phase LPG injection (LPLi) system (the 3rd generation technology) has been considered as one of the most promising fuel supply systems for LPG vehicles. To investigate the reaction characteristics of LPG with rubber parts in LPLi system, various rubbers were tested. The results showed that the amount of residue from the cover rubber of a fuel pump was increased about 10 times after testing. Furthermore, the amount of sulfur and nitrogen species which are considered as main sources of deposit formation in LPLi fuel injectors were also found to be higher than those in original LPG fuel. In addition, these residues made the core parts of LPLi injector such as needle and nozzle, partially worn, which eventually causes leakage in LPLi injectors.

Reaction Characteristics of LPG fuel in LPLi fuel supply system (LPLi연료시스템의 LPG연료 반응성 연구)

  • Kim, Chang-Up;Park, Cheol-Woong;Kang, Kern-Yong
    • Proceedings of the KSME Conference
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    • 2008.11b
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    • pp.2904-2909
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    • 2008
  • The liquid phase LPG injection (LPLi) system (the 3rd generation technology) has been considered as one of the more promising fuel supply systems for LPG vehicles. To investigate the characteristics of LPG residue in LPLi system, various rubbers were reacted with LPG fuels. The results showed that the residue of a cover rubber in a fuel pump after test increased 10 times higher than that before test. Furthermore, the amount of sulfur, nitrogen species which are considered as main sources in deposit formation in the LPLi fuel injector were also found to be higher than that in original LPG fuel. And these residues made the core parts of LPLi injector such as a neddle and a nozzle, partially worn, which eventually causes a leakage in LPLi injectors.

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A Study on Performance Improvement in Durability and Reliability of LPi Injector (LPI 인젝터의 성능 및 내구성 개선에 관한 연구)

  • Park, Cheol-Woong;Kim, Chang-Up;Choi, Kyo-Nnam;Baik, Seung-Kook;Shin, Moon-Sung
    • Journal of the Korean Institute of Gas
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    • v.16 no.2
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    • pp.38-44
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    • 2012
  • In recent years, the need for more fuel-efficient and lower-emission vehicles has driven the technical development of alternative fuels such as LPi (Liquid phase LPG injection) which uses pump for the high pressure supply of liquid LPG fuel and is able to meet the limits of better emission levels while it has an advantage of higher power. Although it has the advantage of power and lower emission levels, the characteristics of LPG, such as high vapor pressure, lower viscosity and surface tension than gasoline fuels makes it difficult design system. Therefore most fuel pumps and injectors are imported. In the present study, in order to domestically develop LPG injector which guarantees flow rates and optimal operation, the experimental investigation on leakage and flow rate characteristics of developed prototype injector was carried out at the bench test rig for developed injector.