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Determination of the performance limits of flame arresters at increased oxygen concentrations |
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| Institution: | 1. Nanjing University of Aeronautics and Astronautics, Jiangsu Province Key Laboratory of Aerospace Power System, 29 Yudao St., Nanjing 210016, China;2. Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China;3. School of National Defense Engineering, PLA University of Science and Technology, 88 Biaoying Rd., Nanjing 210007, Jiangsu, China;1. Institute of Water Resources and Hydropower Research, Northwest A&F University, Shaanxi, Yangling, 712100, PR China;2. Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Shaanxi, Yangling, 712100, PR China;3. The Yellow River Electric Power Maintenance Engineering Co Ltd, Qinghai, Xining, 810000, PR China;4. China Institute of Water Resources and Hydropower Research, Beijing, 100048, PR China;5. Department of Energy Systems, SINTEF Energy Research, Trondheim, Norway;6. Institute for Risk and Uncertainty, Chadwick Building, University of Liverpool, Peach Street, Liverpool, L69 7ZF, United Kingdom |
| Abstract: | This investigation shows how an increased oxygen concentration influences the performance limits of crimped ribbon deflagration flame arresters at elevated pressures. An evaluation of the maximum experimental safe gap (MESG) as reliable criterion for describing the performance limits under non-atmospheric conditions is given. Measurements of MESGs and flame arrester performance tests were performed. Various fuel/oxygen/air mixtures containing ethylene and propane were used as testing gases. Former studies on the pressure dependence and the influence of oxygen on the MESG were initially confirmed. Furthermore, performance tests using a commercial deflagration flame arrester revealed that such a flame arrester may prevent flame transmission also at non-atmospheric conditions within a limited range. For various oxygen concentrations the performance limits were reached at the same MESG. Hence, it can be assumed that a flame arrester possesses a device- and fuel-specific maximum experimental safe gap for a specific gas mixture in different concentrations and at different pressures. This performance-related maximum safe gap can be used as a parameter for estimating and describing the performance limits of a flame arrester. It offers an attempt to simplify the testing and qualification of deflagration flame arresters for non-atmospheric conditions. |
| Keywords: | Explosion protection Flame arrester Non-atmospheric conditions Increased oxygen Increased pressure Classification Testing |
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