THERMAL SCIENCE
International Scientific Journal
COOLING OF WOOD BRIQUETTES
ABSTRACT
This paper is concerned with the experimental research of surface temperature of wood briquettes during cooling phase along the cooling line. The cooling phase is an important part of the briquette production technology. It should be performed with care, otherwise the quality of briquettes could deteriorate and possible changes of combustion characteristics of briquettes could happen. The briquette surface temperature was measured with an IR camera and a surface temperature probe at 42 sections. It was found that the temperature of briquette surface dropped from 68 to 34°C after 7 minutes spent at the cooling line. The temperature at the center of briquette, during the 6 hour storage, decreased to 38°C.
KEYWORDS
PAPER SUBMITTED: 2012-11-06
PAPER REVISED: 2012-01-28
PAPER ACCEPTED: 2013-03-24
PUBLISHED ONLINE: 2013-04-01
THERMAL SCIENCE YEAR
2013, VOLUME
17, ISSUE
Issue 3, PAGES [833 - 838]
- Michael Hogan, M., Otterstedt, J., Morin, R. and Wilde, J, Biomass for heat and power, the European Climate Foundation, 2010; www.europeanclimate.org/documents/Biomass_report_-_Final.pdf
- Sikkema, R., Steiner, M., Junginger, M., Hiegl, M., Hansen, M., T., and Faaij, A, The European wood pellet markets: current status and prospects for 2020, DOI: 10.1002/bbb.277; Biofuels, Bioprod. Bioref. 5:250-278 (2011).
- P. Perre, On the importance of the temperature level on coupled heat and mass transfer in wood and ligno-cellulosic biomass fundamental aspects, formulation and modeling, European Drying Conference - Euro Drying, 2011 Palma, Spain, 2011.
- Mande S. P., "Thermochemical conversion of biomass", TERI, New Delhi, (2007). elearn.teriuniversity.ac.in/file.php?file=%2F1%2FAPGDRE%2Fmodule8%2Fweek_55.pdf
- Nielsen, N. P., Gardner, D. J., Poulsen, T., and Felby C., Importance of Temperature, Moisture Content, and Species for the Conversion Process of Wood Residues into Fuel Pellets, Wood and Fiber Science, 41(4), 2009, pp. 414-425.
- Kaliyan, N. And Morey, R. V., Factors affecting strength and durability of densified biomass products, 2009, www.biomasschpethanol.umn.edu/August%202010%20updates/Densification_Articles/Kaliyan%20and%20Morey_2009
- Rowell, R. M., Handbook of Wood Chemistry and Wood Composites, CRC Press, 2005.
- Plistil, D., Brozek, M., Malatak, J., Roy, A. and Hutla, P., Mechanical characteristics of standard fuel briquettes on biomass basis, RES. AGR. ENG., 51, 2005 (2): 66-72.
- Zhanbin, C., Normal Temperature Briquetting Technology for Biomass with Original Moisture Content, International Conference on Bioenergy Utilization and Environment Protection - 6th LAMNET Conf. Dalian, China, 2011.
- Menind, A., Krizan, P., Soos, L. Matus, M. and J. Kers, Optimal Conditions for Evaluation of Wood Waste by Briquetting, International DAAAM Baltic Conference Industrial Engineering, 2012, Tallinn.
- Lehtikangas, P., Quality Properties of Pelletised Saw Dust, Biomass and Bioenergy, 20, (2001), pp 351-360.
- Stelte W, Holm JK, Sanadi AR, Barsberg S, Ahrenfeldt J, Henriksen UB. Fuel pellets from biomass: The importance of the pelletizing pressure and its dependency on the processing conditions. Fuel, 2011, 90(11):3285-3290.
- Hartley, I. D., Wood, L. and Singh, I. D., Equilibrium moisture content of biomass briquettes hygroscopic properties of densified softwood pellets, Biomass and Bioenergy 26 (2004), pp. 251 - 253.
- Simpson, W., Equilibrium Moisture Content of Wood in Outdoor Locations, United States Department of Agriculture, Forest Service, Research No. FPL-RN-0268, 1998.