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http://dx.doi.org/10.7731/KIFSE.2019.33.1.007

A Study on the Ignition Temperature and Ignition Induction Time According to Storage Amount of Wood Pellets  

Kim, Hyeong-Seok (Pukyong National Univ.)
Choi, Yu-Jung (Pukyong National Univ.)
Kim, Jung-Hun (Kwangmyung Total Engineering)
Jeong, Phil-Hoon (Division of Fire Protection & Safety Engineering, Electrical & Electronics Engineering, Busan Kyungsang College)
Choi, Jae-Woo (Dept. of Fire Protection Engineering, Pukyong National Univ.)
Publication Information
Fire Science and Engineering / v.33, no.1, 2019 , pp. 7-14 More about this Journal
Abstract
While wood pellets are often used as a fuel in thermoelectric power plants and firewood boilers, there is a risk of ignition temperature when strong wood pellets, which have a high calorific value, for prolonged periods of time. In this research study, the minimum auto ignition temperature and the ignition limitation temperature according to the change in flow rate depending on the size of the test vessel were calculated, and based on these temperatures, the apparent activation energy was calculated to predict the combustive properties of the material. The apparent activation energy was calculated to be 190.224 kJ/mol. The thicker the sample is storage in the vessel, the longer the ignition induction time was due to the increased difficulty in heat being transferred from the surface of the vessel to the middle section area of the vessel. For vessel of the same size, the higher the flow rate, the lower the auto ignition temperature was. It was also confirmed that increases in the size of the test vessel lowered the auto ignition temperature and increased the ignition induction time.
Keywords
Flow rate; Minimum ignition temperature; Apparent activation energy; Ignition induction time;
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Times Cited By KSCI : 1  (Citation Analysis)
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