The Experts below are selected from a list of 2550 Experts worldwide ranked by ideXlab platform
Shaojun Liu - One of the best experts on this subject based on the ideXlab platform.
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The simulation and analysis of leakage and explosion at a renewable hydrogen Refuelling Station
International Journal of Hydrogen Energy, 2019Co-Authors: Yang Liang, Xiangmin Pan, Cunman Zhang, Bin Xie, Shaojun LiuAbstract:Abstract The number of hydrogen Refuelling Stations (HRSs) is steadily growing worldwide. In China, the first renewable hydrogen Refuelling Station has been built in Dalian for nearly 3 years. FLACS software based on computational fluid dynamics approach is used in this paper for simulation and analysis on the leakage and explosion of hydrogen storage system in this renewable hydrogen Refuelling Station. The effects of wind speed, leakage direction and wind direction on the consequences of the accident are analyzed. The harmful area, lethal area, the farthest harmful distance and the longest lethal distance in explosion accident of different accident scenarios are calculated. Harmful areas after explosion of different equipments in hydrogen storage system are compared. The results show that leakage accident of the 90 MPa hydrogen storage tank cause the greatest harm in hydrogen explosion. The farthest harmful distance caused by explosion is 35.7 m and the farthest lethal distance is 18.8 m in case of the same direction of wind and leakage. Moreover, it is recommended that the hydrogen tube trailer should not be parked in the hydrogen Refuelling Station when the amount of hydrogen is sufficient.
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Safety study of a wind–solar hybrid renewable hydrogen Refuelling Station in China
International Journal of Hydrogen Energy, 2016Co-Authors: Xiangmin Pan, Cunman Zhang, Shaojun LiuAbstract:Abstract The first renewable hydrogen Refuelling Station in China is under development for fuel cell vehicles. A safety study is conducted for the hydrogen Station that consists of hybrid solar and wind power, integrated hydrogen generation and tube trailer delivery, hydrogen compression, hydrogen storage, and hydrogen filling system. Hazards associated with hydrogen systems are identified and typical failure scenarios are analyzed in terms of event probabilities and consequences severities. Safety measures and emergency responses are discussed. Results show that compressors are the major risk contributor and additional safety measures are required to reduce the hazards from the failure of compressors. Releases of hydrogen can result in either jet fire or flash fire depending on the time of ignition. From the consequence perspective, jet flame length determines the longest lethal distances and flash fire leads to the longest harm distances. To mitigate the risk of catastrophic tank rupture in fire events, all tanks must be cooled with flooding quantities of water. A safety distance of 6 m from the compressors would be appropriate during siting and location decision process, from the risk perspective. However, in the worst-case scenarios, a setback perimeter of 50 m is suggested to keep the public away from the accident scene.
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safety study of a wind solar hybrid renewable hydrogen Refuelling Station in china
International Journal of Hydrogen Energy, 2016Co-Authors: Xiangmin Pan, Cunman Zhang, Shaojun LiuAbstract:Abstract The first renewable hydrogen Refuelling Station in China is under development for fuel cell vehicles. A safety study is conducted for the hydrogen Station that consists of hybrid solar and wind power, integrated hydrogen generation and tube trailer delivery, hydrogen compression, hydrogen storage, and hydrogen filling system. Hazards associated with hydrogen systems are identified and typical failure scenarios are analyzed in terms of event probabilities and consequences severities. Safety measures and emergency responses are discussed. Results show that compressors are the major risk contributor and additional safety measures are required to reduce the hazards from the failure of compressors. Releases of hydrogen can result in either jet fire or flash fire depending on the time of ignition. From the consequence perspective, jet flame length determines the longest lethal distances and flash fire leads to the longest harm distances. To mitigate the risk of catastrophic tank rupture in fire events, all tanks must be cooled with flooding quantities of water. A safety distance of 6 m from the compressors would be appropriate during siting and location decision process, from the risk perspective. However, in the worst-case scenarios, a setback perimeter of 50 m is suggested to keep the public away from the accident scene.
Cihangir Kale - One of the best experts on this subject based on the ideXlab platform.
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techno economical evaluation of a hydrogen Refuelling Station powered by wind pv hybrid power system a case study for izmir cesme
International Journal of Hydrogen Energy, 2018Co-Authors: Murat Gökçek, Cihangir KaleAbstract:Abstract Hydrogen fuelling Station is an infrastructure for the commercialisation of hydrogen energy utilising fuel cells, particularly, in the automotive sector. Hydrogen fuel produced by renewable sources such as the solar and wind energy can be an alternative fuel to depress the use of fuels based on fossil sources in the transport sector for sustainable clean energy strategy in future. By replacing the primary fuel with hydrogen fuel produced using renewable sources in road transport sector, environmental benefits can be achieved. In the present study, techno-economic analysis of hydrogen Refuelling Station powered by wind-photovoltaics (PV) hybrid power system to be installed in Izmir-Cesme, Turkey is performed. This analysis is carried out to a design of hydrogen Refuelling Station which is Refuelling 25 fuel cell electric vehicles on a daily basis using hybrid optimisation model for electric renewable (HOMER) software. In this study, National Aeronautics and Space Administration (NASA) surface meteorology and solar energy database were used. Therefore, the average wind speed during the year was assessed to be 5.72 m/s and the annual average solar irradiation was used to be 5.08 kW h/m2/day for the considered site. According to optimisation results obtained for the proposed configuration, the levelised cost of hydrogen production was found to be US $7.526–7.866/kg in different system configurations. These results show that hydrogen Refuelling Station powered by renewable energy is economically appropriate for the considered site. It is expected that this study is the pre-feasibility study and obtained results encougare the hydrogen Refuelling Station to be established in Turkey by inventors or public institutions.
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Optimal design of a Hydrogen Refuelling Station (HRFS) powered by Hybrid Power System
Energy Conversion and Management, 2018Co-Authors: Murat Gökçek, Cihangir KaleAbstract:Abstract The use of hydrogen as transportation fuel is considered to be a favourable alternative to fossil fuels. It is believed that the development of fuel cell vehicles will greatly facilitate reduction of greenhouse gas emissions from the transportation sector due to the fact that these vehicles are fuelled by hydrogen, which can be produced by a wide range of processes using renewable energy sources. In order to promote the use of fuel cell vehicles, it is imperative to build the necessary facilities to support this need in the near future, including hydrogen Refuelling Stations powered by renewable power generation systems. In this study, techno-economic analysis was performed for a hydrogen Refuelling Station powered by two types of hybrid renewable power generation systems (wind-photovoltaic-battery and wind-battery systems) which will be installed on the island of Gokceada, Turkey. The analysis was carried out to assess the feasibility of the hydrogen Refuelling Station to refuel 25 vehicles on a daily basis throughout the year, using HOMER software. Based on the results, the levelized cost of hydrogen for the hydrogen Refuelling Station powered by the hybrid wind-photovoltaic-battery and wind-battery systems is $ 8.92/kg and $ 11.08/kg, respectively. The levelized cost of hydrogen was also determined for different variable parameters (wind speed, wind turbine hub height, solar irradiance, and project lifetime). It is concluded that the hydrogen Refuelling Station powered by the proposed renewable power generation systems may be feasible for the chosen site.
Xiangmin Pan - One of the best experts on this subject based on the ideXlab platform.
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The simulation and analysis of leakage and explosion at a renewable hydrogen Refuelling Station
International Journal of Hydrogen Energy, 2019Co-Authors: Yang Liang, Xiangmin Pan, Cunman Zhang, Bin Xie, Shaojun LiuAbstract:Abstract The number of hydrogen Refuelling Stations (HRSs) is steadily growing worldwide. In China, the first renewable hydrogen Refuelling Station has been built in Dalian for nearly 3 years. FLACS software based on computational fluid dynamics approach is used in this paper for simulation and analysis on the leakage and explosion of hydrogen storage system in this renewable hydrogen Refuelling Station. The effects of wind speed, leakage direction and wind direction on the consequences of the accident are analyzed. The harmful area, lethal area, the farthest harmful distance and the longest lethal distance in explosion accident of different accident scenarios are calculated. Harmful areas after explosion of different equipments in hydrogen storage system are compared. The results show that leakage accident of the 90 MPa hydrogen storage tank cause the greatest harm in hydrogen explosion. The farthest harmful distance caused by explosion is 35.7 m and the farthest lethal distance is 18.8 m in case of the same direction of wind and leakage. Moreover, it is recommended that the hydrogen tube trailer should not be parked in the hydrogen Refuelling Station when the amount of hydrogen is sufficient.
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Safety study of a wind–solar hybrid renewable hydrogen Refuelling Station in China
International Journal of Hydrogen Energy, 2016Co-Authors: Xiangmin Pan, Cunman Zhang, Shaojun LiuAbstract:Abstract The first renewable hydrogen Refuelling Station in China is under development for fuel cell vehicles. A safety study is conducted for the hydrogen Station that consists of hybrid solar and wind power, integrated hydrogen generation and tube trailer delivery, hydrogen compression, hydrogen storage, and hydrogen filling system. Hazards associated with hydrogen systems are identified and typical failure scenarios are analyzed in terms of event probabilities and consequences severities. Safety measures and emergency responses are discussed. Results show that compressors are the major risk contributor and additional safety measures are required to reduce the hazards from the failure of compressors. Releases of hydrogen can result in either jet fire or flash fire depending on the time of ignition. From the consequence perspective, jet flame length determines the longest lethal distances and flash fire leads to the longest harm distances. To mitigate the risk of catastrophic tank rupture in fire events, all tanks must be cooled with flooding quantities of water. A safety distance of 6 m from the compressors would be appropriate during siting and location decision process, from the risk perspective. However, in the worst-case scenarios, a setback perimeter of 50 m is suggested to keep the public away from the accident scene.
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safety study of a wind solar hybrid renewable hydrogen Refuelling Station in china
International Journal of Hydrogen Energy, 2016Co-Authors: Xiangmin Pan, Cunman Zhang, Shaojun LiuAbstract:Abstract The first renewable hydrogen Refuelling Station in China is under development for fuel cell vehicles. A safety study is conducted for the hydrogen Station that consists of hybrid solar and wind power, integrated hydrogen generation and tube trailer delivery, hydrogen compression, hydrogen storage, and hydrogen filling system. Hazards associated with hydrogen systems are identified and typical failure scenarios are analyzed in terms of event probabilities and consequences severities. Safety measures and emergency responses are discussed. Results show that compressors are the major risk contributor and additional safety measures are required to reduce the hazards from the failure of compressors. Releases of hydrogen can result in either jet fire or flash fire depending on the time of ignition. From the consequence perspective, jet flame length determines the longest lethal distances and flash fire leads to the longest harm distances. To mitigate the risk of catastrophic tank rupture in fire events, all tanks must be cooled with flooding quantities of water. A safety distance of 6 m from the compressors would be appropriate during siting and location decision process, from the risk perspective. However, in the worst-case scenarios, a setback perimeter of 50 m is suggested to keep the public away from the accident scene.
O Valero - One of the best experts on this subject based on the ideXlab platform.
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off grid test results of a solar powered hydrogen Refuelling Station for fuel cell powered unmanned aerial vehicles
International Journal of Hydrogen Energy, 2014Co-Authors: E Troncoso, N Lapenarey, O ValeroAbstract:Abstract Fuel cell (FC) propulsion for small (MTOW From the results obtained, the operation of the CPV array and the CPV inverter connected to the electrolyser were both satisfactory, and no significant operational issues were observed. The overall energy efficiency of the CPV-inverter-electrolyser system was below 40%, mainly due to the excessively long start-up periods during which the electrolyser is not producing hydrogen, the slow dynamic response due to regular pressurization and depressurization cycles of the electrolyser and the excessive power consumption of the electrolyser auxiliaries. It is expected that if some optimization is carried out, mainly related to the control system of the electrolyser, the overall energy efficiency should increase and the dynamic response of the electrolyser can be improved.
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solar powered hydrogen Refuelling Station for unmanned aerial vehicles design and initial ac test results
International Journal of Hydrogen Energy, 2014Co-Authors: E Troncoso, N Lapenarey, O ValeroAbstract:Abstract Fuel cell technology can offer environmental benefits (low noise and emissions) and also a competitive advantage over conventional power sources (better performance, low thermal signature, less vibration issues, etc) in small manned and unmanned electric air vehicles (UAVs). To develop an environmentally acceptable solution, the hydrogen fuel source must be produced on-site from renewable energy sources. This paper describes the development and testing of a fully operational small-scale demonstrator to generate and supply hydrogen for 2 to 3 daily fuel cell-powered UAV operations. The purity of the hydrogen delivered to the air platforms is ≥99.99%. Solar irradiation data and daily hydrogen demand across the year for the location selected (Ocana, Spain) were employed as the primary input to a spreadsheet-based model to calculate a recommended the optimum sizing solution. Simulations were then performed to assess the expected operation of the system. Additional practical issues were then considered, including project budget, available space, size and availability of commercial components, safety standards and regulatory compliance. The design selected comprises a concentrated photovoltaic array (CPV), an alkaline electrolyser, a hydrogen buffer tank and a diaphragm hydrogen compressor. Four small composite tanks rated at 3000 barg are included to ensure enough endurance and fast Refuelling of the UAVs at any time during the year. These tanks are recharged and installed on-board the UAV at the beginning of each flying mission. For the system to operate effectively the recommended design has 10 kW of CPV capacity and over 34 Nm3 of total hydrogen storage capacity to accumulate hydrogen generation during sunny periods and guarantee performance across winter months. Once the detailed design was completed, all components were installed and assembled, including a bespoke control system for self-governing off-grid operation. Grid-connected tests were then carried out to assess the components integration and acceptance prior to any unsupervised off-grid operation. It is expected that the system will provide enough field data to act as a test-bed towards a fully autonomous Refuelling solution for UAVs.
Murat Gökçek - One of the best experts on this subject based on the ideXlab platform.
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techno economical evaluation of a hydrogen Refuelling Station powered by wind pv hybrid power system a case study for izmir cesme
International Journal of Hydrogen Energy, 2018Co-Authors: Murat Gökçek, Cihangir KaleAbstract:Abstract Hydrogen fuelling Station is an infrastructure for the commercialisation of hydrogen energy utilising fuel cells, particularly, in the automotive sector. Hydrogen fuel produced by renewable sources such as the solar and wind energy can be an alternative fuel to depress the use of fuels based on fossil sources in the transport sector for sustainable clean energy strategy in future. By replacing the primary fuel with hydrogen fuel produced using renewable sources in road transport sector, environmental benefits can be achieved. In the present study, techno-economic analysis of hydrogen Refuelling Station powered by wind-photovoltaics (PV) hybrid power system to be installed in Izmir-Cesme, Turkey is performed. This analysis is carried out to a design of hydrogen Refuelling Station which is Refuelling 25 fuel cell electric vehicles on a daily basis using hybrid optimisation model for electric renewable (HOMER) software. In this study, National Aeronautics and Space Administration (NASA) surface meteorology and solar energy database were used. Therefore, the average wind speed during the year was assessed to be 5.72 m/s and the annual average solar irradiation was used to be 5.08 kW h/m2/day for the considered site. According to optimisation results obtained for the proposed configuration, the levelised cost of hydrogen production was found to be US $7.526–7.866/kg in different system configurations. These results show that hydrogen Refuelling Station powered by renewable energy is economically appropriate for the considered site. It is expected that this study is the pre-feasibility study and obtained results encougare the hydrogen Refuelling Station to be established in Turkey by inventors or public institutions.
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Optimal design of a Hydrogen Refuelling Station (HRFS) powered by Hybrid Power System
Energy Conversion and Management, 2018Co-Authors: Murat Gökçek, Cihangir KaleAbstract:Abstract The use of hydrogen as transportation fuel is considered to be a favourable alternative to fossil fuels. It is believed that the development of fuel cell vehicles will greatly facilitate reduction of greenhouse gas emissions from the transportation sector due to the fact that these vehicles are fuelled by hydrogen, which can be produced by a wide range of processes using renewable energy sources. In order to promote the use of fuel cell vehicles, it is imperative to build the necessary facilities to support this need in the near future, including hydrogen Refuelling Stations powered by renewable power generation systems. In this study, techno-economic analysis was performed for a hydrogen Refuelling Station powered by two types of hybrid renewable power generation systems (wind-photovoltaic-battery and wind-battery systems) which will be installed on the island of Gokceada, Turkey. The analysis was carried out to assess the feasibility of the hydrogen Refuelling Station to refuel 25 vehicles on a daily basis throughout the year, using HOMER software. Based on the results, the levelized cost of hydrogen for the hydrogen Refuelling Station powered by the hybrid wind-photovoltaic-battery and wind-battery systems is $ 8.92/kg and $ 11.08/kg, respectively. The levelized cost of hydrogen was also determined for different variable parameters (wind speed, wind turbine hub height, solar irradiance, and project lifetime). It is concluded that the hydrogen Refuelling Station powered by the proposed renewable power generation systems may be feasible for the chosen site.
