Effects of humidity on minimum ignition energy of gaseous epoxypropane/air mixtures |
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| Authors: | Qi Zhang Rumei Tan Ying Huang Huimin Liang |
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| Affiliation: | 1. CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, Anhui, PR China;2. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, Anhui, PR China;3. School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232000, Anhui, PR China;4. College of Science, North University of China, Taiyuan 030051, Shanxi, PR China;1. Dicle University, Faculty of Medicine, Department of Emergency Medicine, Diyarbak?r, Turkey;2. Dicle University, Faculty of Medicine, Department of Plastic and Reconstructive Surgery, Diyarbak?r, Turkey;3. Diyarbak?r Training and Research Hospital, Emergency Medicine Department, Diyarbak?r, Turkey;1. School of Safety Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China;2. Beijing Academy of Safety Engineering and Technology, Beijing 102617, China;3. Beijing Key Lab of Environmental Noise and Vibration, Beijing Municipal Institute of Labor Protection, Beijing, 100054, China |
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| Abstract: | The minimum ignition energy (MIE) is an important property for designing safety standards and understanding the ignition process of combustible mixtures. The minimum ignition energy (MIE) of gaseous epoxypropane/air mixtures is measured using capacitive spark discharge. The effect of humidity on MIE is studied. It is shown that the MIE is not constant when the relative humidity increases from 40% to 88% at room temperature. The relative humidity has no significant influence on the MIE of gaseous epoxypropane/air mixtures at the lower volume fraction of gaseous epoxypropane in air. But, it has significant influence on that at the higher volume fraction. The MIEs of gaseous epoxypropane/air mixtures vary with the fraction of gaseous epoxypropane in air and the humidity. The lowest value of MIE (0.12 mJ) of gaseous epoxypropane/air mixtures is reached at around 10% in the examined ranges of the concentrations for the humidity 40%. The lowest values of MIE (0.1 mJ) of the mixtures are reached also at around 10% in the examined ranges of the concentrations for the humidity 66% and 88% respectively. |
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