The Experts below are selected from a list of 3813 Experts worldwide ranked by ideXlab platform

Dongil Shin - One of the best experts on this subject based on the ideXlab platform.

  • analysis of gas explosion consequence models for the explosion risk control in the new gas energy Filling Stations
    Industrial & Engineering Chemistry Research, 2013
    Co-Authors: Dong Ju Moon, En Sup Yoon, Dongil Shin
    Abstract:

    New sorts of energy are emerging as alternative clean fuel for transportation, power generation, and household. Using the DME–LPG mixture or HCNG is being considered and investigated as an improved option for the satisfaction of regulations over current policy of using LPG or CNG. In this research, we compare the safety of mixture fuels and existing fuels in the perspective of explosion risk that would be the biggest concern in the operation of new-energy Stations. The explosion risk is analyzed and compared by using three different representative models: empirical, phenomenological, and CFD-based models, ordered in increased model complexity and computational and modeling efforts. Maximum overpressures of explosion of mixture and existing fuels respectively show similar results, in all three models, and no additional risk is expected in the modified use of current refueling facilities. CFD-based explosion simulation is determined to be used in deciding the exact overpressure distribution and optimal inst...

  • analysis of gas explosion consequence models for the explosion risk control in the new gas energy Filling Stations
    Industrial & Engineering Chemistry Research, 2013
    Co-Authors: Seungkyu Dan, Dong Ju Moon, En Sup Yoon, Dongil Shin
    Abstract:

    New sorts of energy are emerging as alternative clean fuel for transportation, power generation, and household. Using the DME–LPG mixture or HCNG is being considered and investigated as an improved...

  • Safety distance analysis of dimethylether Filling Stations using a modified individual risk assessment method
    Korean Journal of Chemical Engineering, 2011
    Co-Authors: Won So, Dongil Shin, En Sup Yoon
    Abstract:

    The physical properties of dimethylether (DME) are similar to conventional fuels such as LPG and diesel, so DME has been recently considered one of the most promising candidates for a substitute for them. Equipment failures in gas Stations lead to accidents that pose significant threats to people and property. Therefore, prior to commercialization, safety standards for DME need to be developed based on risk analysis. In this study, we focused on safety distance in DME Filling Stations. A hypothetical DME Filling station was modeled based on a DME-LPG mixed Filling station designed by KOGAS, and safety distances were suggested from a semi-quantitative risk estimation approach using individual risk calculations. Modified individual risk calculations were performed with consequence analysis and failure mode under varying accident scenarios. Compared with existing individual risk analysis, the modified-individual risk approach is supplemented with a weighting factor to graduate each accident scenario by historical analysis. Subsequently, the outcome shows the individual risk that suggests a safety distance. To compare with conventional fuel, we also performed a comparative study on the Filling station fuels LPG and DME. According to the quantitative risk estimation results, we propose a separation distance based on accident scenarios for each facility. In conclusion, safe distances for DME facilities are lower than those that dispense LPG. Therefore, a DME Filling unit can be placed at conventional gas Stations without increasing the safety distance. The results will also be useful in determining the standard for safety management of renewable and sustainable energy.

  • explosion simulations for the quantitative risk analysis of new energy Filling Stations
    Journal of the Korean Institute of Gas, 2011
    Co-Authors: Kyungjun Park, Dongil Shin
    Abstract:

    The interest about new and renewable energy is increasing to reduce the burden of problems by depletion of fossil fuels and air pollutions. For example, LNG/CNG and LPG are expected to be replaced, especially in transportation use, by HCNG mixture and DME-LPG mixture, respectively. Because these new energies are still flammable gases, it is not inherently safe from the explosion. In this research, the quantitative risk analysis for using alternative mixtures in existing recharging facilities has been studied by using three types of explosion models (TNT equivalency model, PHAST and CFD-based FLACS) to manage the risk effectively. The differences of results by models were compared against, and the practical ways of when and how to use these models were suggested. It was also predicted that conventional gas Filling Stations would be converted as new energy Stations without additional explosion risk.

En Sup Yoon - One of the best experts on this subject based on the ideXlab platform.

  • analysis of gas explosion consequence models for the explosion risk control in the new gas energy Filling Stations
    Industrial & Engineering Chemistry Research, 2013
    Co-Authors: Seungkyu Dan, Dong Ju Moon, En Sup Yoon, Dongil Shin
    Abstract:

    New sorts of energy are emerging as alternative clean fuel for transportation, power generation, and household. Using the DME–LPG mixture or HCNG is being considered and investigated as an improved...

  • analysis of gas explosion consequence models for the explosion risk control in the new gas energy Filling Stations
    Industrial & Engineering Chemistry Research, 2013
    Co-Authors: Dong Ju Moon, En Sup Yoon, Dongil Shin
    Abstract:

    New sorts of energy are emerging as alternative clean fuel for transportation, power generation, and household. Using the DME–LPG mixture or HCNG is being considered and investigated as an improved option for the satisfaction of regulations over current policy of using LPG or CNG. In this research, we compare the safety of mixture fuels and existing fuels in the perspective of explosion risk that would be the biggest concern in the operation of new-energy Stations. The explosion risk is analyzed and compared by using three different representative models: empirical, phenomenological, and CFD-based models, ordered in increased model complexity and computational and modeling efforts. Maximum overpressures of explosion of mixture and existing fuels respectively show similar results, in all three models, and no additional risk is expected in the modified use of current refueling facilities. CFD-based explosion simulation is determined to be used in deciding the exact overpressure distribution and optimal inst...

  • Safety distance analysis of dimethylether Filling Stations using a modified individual risk assessment method
    Korean Journal of Chemical Engineering, 2011
    Co-Authors: Won So, Dongil Shin, En Sup Yoon
    Abstract:

    The physical properties of dimethylether (DME) are similar to conventional fuels such as LPG and diesel, so DME has been recently considered one of the most promising candidates for a substitute for them. Equipment failures in gas Stations lead to accidents that pose significant threats to people and property. Therefore, prior to commercialization, safety standards for DME need to be developed based on risk analysis. In this study, we focused on safety distance in DME Filling Stations. A hypothetical DME Filling station was modeled based on a DME-LPG mixed Filling station designed by KOGAS, and safety distances were suggested from a semi-quantitative risk estimation approach using individual risk calculations. Modified individual risk calculations were performed with consequence analysis and failure mode under varying accident scenarios. Compared with existing individual risk analysis, the modified-individual risk approach is supplemented with a weighting factor to graduate each accident scenario by historical analysis. Subsequently, the outcome shows the individual risk that suggests a safety distance. To compare with conventional fuel, we also performed a comparative study on the Filling station fuels LPG and DME. According to the quantitative risk estimation results, we propose a separation distance based on accident scenarios for each facility. In conclusion, safe distances for DME facilities are lower than those that dispense LPG. Therefore, a DME Filling unit can be placed at conventional gas Stations without increasing the safety distance. The results will also be useful in determining the standard for safety management of renewable and sustainable energy.

Malte Schwoon - One of the best experts on this subject based on the ideXlab platform.

  • a tool to optimize the initial distribution of hydrogen Filling Stations
    Transportation Research Part D-transport and Environment, 2007
    Co-Authors: Malte Schwoon
    Abstract:

    An important barrier towards the introduction of fuel cell vehicles running on hydrogen is the lack of widespread refueling infrastructure. The niche of buses for public transport, taxis and deliverers with a local application area might not be large enough to generate the reductions of fuel cell vehicle costs that are necessary for a general technology switch. Thus, fuel availability at trunk roads probably plays a crucial role in generating demand for these also from private consumers. In this paper, we assume that consumers are more likely to consider buying a fuel cell vehicle the more frequently they are exposed to hydrogen refueling opportunities on long distant trips. We introduce a tool to test different small-scale initial distributions of hydrogen outlets within the German trunk road system for their potential success to generate a large-scale adoption of fuel cell vehicles. The tool makes use of agent-based trip modeling and geographic information system supported spatial modeling. We demonstrate its potentials by testing a ring shaped distribution of hydrogen outlets at highway Filling Stations. We find that the structure of an optimized initial distribution of Filling Stations depends on what drivers consider a sufficiently small distance between refueling opportunities.

  • a tool to optimize the initial distribution of hydrogen Filling Stations
    2006
    Co-Authors: Malte Schwoon
    Abstract:

    An important barrier towards the introduction of fuel cell vehicles (FCVs) running on hydrogen is the lack of widespread refueling infrastructure. The niche of buses for public transport, taxis and deliverers with a local application area might not be large enough to generate the reductions of FCV costs that are necessary for a general technology switch. Thus, fuel availability at trunk roads probably plays a crucial role in generating demand for FCVs also from private consumers. In this paper we assume that consumers are more likely to consider buying a FCV the more frequently they are exposed to hydrogen refueling opportunities on long distant trips. We introduce a tool to test different small scale initial distributions of hydrogen outlets within the German trunk road system for their potential success to generate a large scale adoption of FCVs. The tool makes use of agent based trip modeling and Geographic Information System (GIS) supported spatial modeling. We demonstrate its potentials by testing a ring shaped distribution of hydrogen outlets at highway Filling Stations. We find that the structure of an optimized initial distribution of Filling Stations depends on what drivers consider a sufficiently small distance between refueling opportunities.

Dong Ju Moon - One of the best experts on this subject based on the ideXlab platform.

  • analysis of gas explosion consequence models for the explosion risk control in the new gas energy Filling Stations
    Industrial & Engineering Chemistry Research, 2013
    Co-Authors: Dong Ju Moon, En Sup Yoon, Dongil Shin
    Abstract:

    New sorts of energy are emerging as alternative clean fuel for transportation, power generation, and household. Using the DME–LPG mixture or HCNG is being considered and investigated as an improved option for the satisfaction of regulations over current policy of using LPG or CNG. In this research, we compare the safety of mixture fuels and existing fuels in the perspective of explosion risk that would be the biggest concern in the operation of new-energy Stations. The explosion risk is analyzed and compared by using three different representative models: empirical, phenomenological, and CFD-based models, ordered in increased model complexity and computational and modeling efforts. Maximum overpressures of explosion of mixture and existing fuels respectively show similar results, in all three models, and no additional risk is expected in the modified use of current refueling facilities. CFD-based explosion simulation is determined to be used in deciding the exact overpressure distribution and optimal inst...

  • analysis of gas explosion consequence models for the explosion risk control in the new gas energy Filling Stations
    Industrial & Engineering Chemistry Research, 2013
    Co-Authors: Seungkyu Dan, Dong Ju Moon, En Sup Yoon, Dongil Shin
    Abstract:

    New sorts of energy are emerging as alternative clean fuel for transportation, power generation, and household. Using the DME–LPG mixture or HCNG is being considered and investigated as an improved...

Oluf Langhelle - One of the best experts on this subject based on the ideXlab platform.

  • Awareness, acceptability and attitudes towards hydrogen vehicles and Filling Stations: A Greater Stavanger case study and comparisons with London
    International Journal of Hydrogen Energy, 2008
    Co-Authors: Gunnar Thesen, Oluf Langhelle
    Abstract:

    Abstract This article investigates the determinants of knowledge and acceptability of hydrogen vehicles and Filling Stations among residents in the Greater Stavanger area on the west coast of Norway and compares the results with the findings from a London case study. The data were collected from 1000 residents and based on the survey developed and used by O'Garra, et al. Int J Hydrogen Energy 2005; 30: 649–659. The results indicate that hydrogen as a fuel for transport is better known in Greater Stavanger and also that the population is clearly more favourable towards the introduction of hydrogen vehicles. Although only just over one third are clearly in favour of the introduction of hydrogen vehicles in London, the number in Greater Stavanger is close to 60%. The key determinants of acceptability discussed are prior knowledge and awareness of hydrogen, sociodemographic background variables and environmental knowledge. In addition, the study also explores the effects of proximity to the Filling station. The site for the location of the London Filling station was a matter of public controversy and met with resistance from people living close to the Filling station. Based on these experiences, the Greater Stavanger sample was divided into two. One sample was drawn from residents living within a 1-km circle of the location of the Filling station, and one control sample was drawn from the Greater Stavanger area. Somewhat surprisingly, the support for the introduction of hydrogen vehicles is greater among people living closer to the Filling station than in the region as such.