Evaluation of the safe separation distances of hydrogen-blended natural gas pipelines in a jet fire scenario |
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| Affiliation: | 1. College of Safety and Ocean Engineering, China University of Petroleum, Beijing 102249, China;2. Key Laboratory of Oil and Gas Safety and Emergency Technology, Ministry of Emergency Management, Beijing 102249, China;1. Institute of Refrigeration and Cryogenic Engineering, Xi''an Jiaotong University, Xi''an 710049, China;2. China Special Equipment Inspection and Research Institute, Beijing, 100029, China;3. College of Petroleum and Chemical, Lanzhou University of Technology, Lanzhou, 730050, China;1. Guangdong Energy Group Science and Technology Research Institute Co. Ltd., Guangzhou 510000, China;2. Guangdong Huizhou Lng Power Co. Ltd., Huizhou 516000, China;3. Guangdong Energy Group Co., Ltd., Guangzhou 510000, China;4. School of Materials and Physics, China University of Mining and Technology, Xuzhou 221116, China;1. Department of Metallurgical and Materials Engineering, Nevsehir Haci Bektas Veli University, Nevsehir, 50300, Turkey;2. Department of Metallurgical and Materials Engineering, Eskisehir Osmangazi University, Eskisehir, 26040, Turkey;1. Xi''an Key Laboratory of Sustainable Energy Materials Chemistry, Department of Applied Chemistry, School of Chemistry, Xi''an Jiaotong University, Xi''an 710049, China;2. State Key Laboratory of Multiphase Flow in Power Engineering, Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi''an Jiaotong University, Xi''an 710049, China;3. College of Eco-environmental Engineering, Qinghai University, Xi''ning 810016, China;1. Department of Smart Manufacturing Engineering, Graduate School of Engineering, Changwon National University, 20 Changwondaehak-ro, Uichang-gu, Changwon 51140, Republic of Korea;2. Defense Development Team, Hyundai Wia Corp., 154 Jeongdong-ro, Seongsan-gu, Changwon 51537, Republic of Korea;3. Department of Mechanical Engineering, College of Mechatronics, Changwon National University, 20 Changwondaehak-ro, Uichang-gu, Changwon 51140, Republic of Korea |
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| Abstract: | The desire for sustainable development in various countries has increased the use of hydrogen energy. Considering cost and time savings, the introduction of hydrogen into existing natural gas pipelines is an excellent option, and the failure consequences of hydrogen blending in natural gas pipelines should be considered. In this study, a solid flame model is used to calculate the thermal radiation intensity of a hydrogen-blended natural gas jet fire. A method is proposed to modify the calculation of the view factor in the near field, and parameters such as the specific heat capacity and calorific value of pure gas are replaced by the parameters of the mixed gas. The data of the Thornton and modified models are compared with the experimental results, and the modified model result is found to be more accurate. Using the modified model, the variations in different hydrogen blending ratios, internal pressures, and pipe diameters with the safe separation distance of the thermal radiation intensity in a pipeline accident are investigated, and the relationships between them are analyzed. |
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| Keywords: | Hydrogen-blended natural gas Solid flame model Thermal radiation intensity Safe separation distance Risk assessment |
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