Browse > Article
http://dx.doi.org/10.5762/KAIS.2019.20.4.590

A Study on the Spontaneous Ignition Characteristics of Wood Pellets related to Change in Flow Rate  

Kim, Hyeong-Seok (Department of Safety Engineering Graduate Student, Pukyong National University)
Choi, Yu-Jung (Department of Fire Protection Engineering Graduate Student, Pukyong National University)
Choi, Jae-Wook (Department of Fire Protection Engineering, Pukyong National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.20, no.4, 2019 , pp. 590-596 More about this Journal
Abstract
Uses of fossil fuels like coal and oil increases with industrial development, and problems like abnormal climate come up as greenhouse gas increases. Accordingly, studies are actively conducted on eco-friendly renewable energy as a replacement for the main resources, and especially, wood pellets with high thermal efficiency are in the limelight as an alternative fuel in thermal power stations and gas boilers. However, despite a constant increase in their usage, few studies are conducted on their risks like fire and spontaneous combustion. Thus, this study found the auto-ignition temperature and critical ignition temperature of wood pellets with a change in flow rate in a thermostatic bath, using a sample vessel with 20 cm in length, 20 cm in height and 14 cm in thickness to predict their ignition characteristics. Consequently, at the flow rate of 0 NL/min, as the core temperature of the sample increased to higher than the ambient temperature, they ignited at $153^{\circ}C$, when the critical ignition temperature was $152.5^{\circ}C$. At the flow rates of 0.5 NL/min and 1.0 NL/min, it was $149.5^{\circ}C$, and at the flow rate of 1.5 NL/min, it was $147.5^{\circ}C$. Consequently, at the same storage, the more the flow rate, the lower the critical ignition temperature became.
Keywords
Wood Pellet; Spontaneous Ignition; Vessel; Flow Rate; Critical Ignition Temperature;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Y. H. Park, D. O. Youn, "Applicability of A New Tidal Power System with Reduced Environmental Impact", The Korea Academia-Industrial Cooperation Society, Vol.18, No.12, pp.112-117, Dec. 2017. DOI: http://dx.doi.org/10.5762/KAIS.2017.18.12.112
2 K. S. Shin, H. R. Choi, H. C. Lee, "Topic Model Analysis of Research Trend on Renewable Energy", The Korea Academia-Industrial Cooperation Society, Vol.16, No.9, pp.6411-6418, Sep. 2015. DOI: http://dx.doi.org/10.5762/KAIS.2015.16.9.6411   DOI
3 S. W. Yoon, H. D. Kang, K. Y. Kang. Bioindustry and Environment. p.292-300, Moonumsa, 2010.
4 Y. S. Mok, J. W. Choi, "A Study on Autoignition of Granulated Activated Carbon with Change of Ambient Temperature", The Korean Society of Safety, Vol.7, No.4, pp.45-53, Dec. 1992.
5 Y. J. Park, H. P. Lee, K. C. Goh, Y. S. Eom, "A Study on the Spontaneous Ignition Possibility of Shredded Waste Thermoplastic Elastomer", The Korean Society of Safety, Vol.31, No.1, pp.61-65, Feb. 2016. DOI: http://dx.doi.org/10.14346/JKOSOS.2016.31.1.061
6 J. L. Jackson, "Spontaneous Ignition Temperature", Industrial and Engineering Chemistry, Vol.43, No.12, pp.2869-2870, 1951. DOI: http://dx.doi.org/10.1021/ie50504a058   DOI
7 Y. Kadioglu, M. Varamaz, "The Effect of Moisture Content and Air-drying on Spontaneous Combustion Characteristics of Two Turkish lignites", Fuel, Vol.82, pp.1685-1693, 2003. DOI: http://dx.doi.org/10.1016/S0016-2361(02)00402-7   DOI
8 P. H. Thomas, Self-heating and Thermal Ignition - A Guide to its Theory and Application, America Society for Testing and Materials, USA, pp.56-82, 1972. DOI: http://dx.doi.org/10.1520/STP32090S
9 B. E. Mitchell, P. C. Jurs, "Prediction of Autoignition Temperatures of Organic Compounds from Molecular ", J. Chem. Inf. Comput, Sci, Vol.37, No.3, pp.538-547, May. 1997. DOI: https://pubs.acs.org/doi/abs/10.1021%2Fci960175l   DOI
10 D. A. Frank-Kamenetskii. Diffusion and Heat Transfer in Chemical Kinetises. p.5-36, Pleum Press, 1969.
11 N. N. Semenov. Chemical Kinetics and Chain Reaction. Oxford University Press, 1935. DOI: https://pubs.acs.org/doi/abs/10.1021/ed012p298.3
12 J. W. Choi, S. G. Jeon. Fire Protection Safety Engineering. p.92-100, Hwasumok, 2018.
13 Y. R. Kim, S. R. Lee, Test Report for Wood Pellet, KOTITI Testing & Research Institute, Korea.
14 Korea Forest Research Institute, Standards and Quality Standards of Wood Products, Korea.
15 W. S. Lim, A Study on the Explosion Characteristics of Hydroxy Propyl Methyl Cellulose dust, Ph.D. dissertation, Pukyong National University of Safety Engineering, Busan, Korea, pp.84-90, 2005.
16 O. G. Penyazkov, "Auto-ignition of Hydrogen-Air Mixture at Nonuniform Flow and Boundary Conditions", Proceedings of the European Combustion Meeting 2009, Heat and Mass Transfer Institute, Minsk, Belarus, Space Research Institute, Vienna, Austria, pp.1-3, March 2009.
17 H. J. Kang, A Study on the Autoignition Characteristics of Waste Polyurethane Foam, Master's thesis, Pukyong National University of Safety Engineering, Busan, Korea, pp.11-13, 2002.
18 Y. J. Choi, A Study on the Spontaneous Ignition Characteristic of Wood Pellet and Powder used in Mixtures of Thermal Power Plant, Master's thesis, Pukyong National University of Fire Protection Engineering, Busan, Korea, pp.15-16, 2017.