Qualitative risk assessment of a Dual Fuel (LNG-Diesel) system for heavy-duty trucks |
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| Institution: | 1. Clean Energy Automotive Engineering Center, Tongji University, Caoan Road 4800, Shanghai, 201804, PR China;2. Shanghai Motor Vehicle Inspection Certification & Technology Innovation Center, No.68 Yutian South Road, Shanghai, 201805, PR China;3. GexCon China, No.18 Taolin Road, Shanghai, Shanghai, 200135, PR China;4. Shanghai Sunwise New Energy Systems Co., Ltd., No.88 Henyong Road, Shanghai, Shanghai, 201806, PR China;1. Division of Ocean System Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea;2. Hyundai Heavy Industries Co. Ltd., 17-10, Mabuk-ro 240beon-gil, Giheung-gu, Yongin-si, Gyeonggi-do 446-912, Republic of Korea;1. Dipartimento di Ingegneria Industriale, Università degli Studi di Padova, Via Marzolo 9, 35131, Padova, Italy;2. Dipartimento di Ingegneria Civile, Chimica, Ambientale e dei Materiali, Università degli studi di Bologna, Via Terracini 28, 40131, Bologna, Italy;3. Dipartimento di Ingegneria Civile, Edile e Ambientale, Università di Padova, Via Marzolo 9, 35131, Padova, Italy;1. Graduate School of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan;2. JSPS Research Fellow, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo 102-0083, Japan;3. Center for Creation of Symbiosis Society with Risk, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan;4. Institute of Advanced Sciences, Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama, Kanagawa 240-8501, Japan |
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| Abstract: | A Dual Fuel (LNG-Diesel) system can be applied to heavy-duty diesel trucks for achieving environmental benefits in comparison to existing diesel vehicles. Because of lack of reports about risk assessment of this technology, we performed a qualitative assessment based on a framework of some literature techniques for risk identification, analysis and evaluation. After constructing a Reliability Block Diagram (RBD) to establish the context, we conducted bow-tie analysis, Fault Tree Analysis (FTA), Failure Mode and Effects Analysis (FMEA), likelihood and consequence analysis, and used a risk matrix. We applied these methods and techniques qualitatively to identify causes (e.g. collisions), critical events (e.g. releases of natural gas), related consequences (e.g. fires and explosions), and different possible pathways from a specific cause to its consequence, and to assess some negative accident scenarios related to use and parking of the vehicle. The bow-tie analysis also allowed to make explicit barriers and controls that prevent critical events and/or mitigate consequences. Therefore, we identified a set of safety measures, including design, technical, management, and emergency actions, which shall be implemented in each step of the system's life cycle.Our risk assessment showed that the risk level of the Dual Fuel (LNG-Diesel) system is similar to the risk level of a traditional diesel system. Future research will overcome current lack of data and, therefore, permit a quantitative rating of the risk of the Dual Fuel (LNG-Diesel) system. |
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| Keywords: | Liquefied Natural Gas (LNG) Dual Fuel Heavy-duty trucks Diesel engine Risk assessment Risk management |
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