The Pack-Bed Sphere Liquid Porous Burner

The combustion of liquid fuel in the porous burner (PB) was experimented to investigate evaporation mechanism and combustion behavior. The diesel oil was used as fuel and the pebbles carefully chosen in the same size like the solid sphere homogeneously was adopted as the porous media. Two structures of the liquid porous burner, i.e. the PB without and with installation of porous emitter (PE), were performed. PE was installed by lower than PB with distance of 20 cm. The pebbles having porosity (φ) of 0.45 and 0.52 were, respectively, used in PB and PE. The fuel was supplied dropwise from the top through the PB and the combustion was occurred between PB and PE. Axial profiles of temperature along the burner length were measured to clarify the evaporation and combustion phenomena. The pollutant emission characteristics were monitored at the burner exit. From the experiment, it was found that the temperature profiles of both structures decreased with the three ways swirling air flows (QA) increasing. On the other hand, the temperature profiles increased with fuel heat input (QF). Obviously, the profile of the porous burner installed with PE was higher than that of the porous burner without PE

Authors:

• B. Krittacom
• P. Amatachaya
• W. Srimuang
• K. Inla

Keywords:

• Liquid fuel
• Porous burner
• Temperature profile.

References:

[1] M. Kaplan, and M.J. Hall, "The Combustion of liquid fuels within a
porous media radiant burner", Experiment Thermal and Fluid Science,
vol. 11, no.1, pp. 13-22, Jul. 1995.
[2] C.J. Tseng and J.R. Howell, "Combustion of liquid fuels in porous radiant
burner", Combustion Science and Technology, vol. 112, pp. 141-161,
1996.
[3] H. Takami, T. Suzuki, Y. Itaya, and M. Hasatani, "Performance of
flammability of kerosene and NOx emission in the porous burner", Fuel,
vol. 77, no 3, pp. 165-171, Feb. 1998.
[4] V.V. Martynenko, R. Echigo, and H. Yoshida, "Mathematical model of
self-sustaining combustion in inert porous medium with phase change
under complex heat transfer", International Journal of Heat and Mass
Transfer, vol. 41, no. 1, pp.117-126, Jan. 1998.
[5] S. Jugjai, N. Wongpanit, T. Laoketkan, and L. Nokkaew, "The
combustion of liquid fuels using a porous medium", Experiment Thermal
and Fluid Science, vol. 26, no. 1, pp. 15-23, Apr. 2002.
[6] S. Jugjai and N. Polmart, "Enhancement of evaporation and combustion
of liquid fuels", Experiment Thermal and Fluid Science, vol. 27, no.8, pp.
901-909, Oct. 2003.
[7] C. W. Park and M. Kaviany, "Evaporation-combustion affected by
in-cylinder reciprocating porous regenerator", Transaction of ASME
Journal of Heat Transfer, vol. 124, pp. 184-194, 2002
[8] T. Fuse, Y. Araki, N. Kobayashi and M. Hasatani, "Combustion
characteristics in oil-vaporizing sustained by radiant heat reflux enhanced
with higher porous ceramics", Fuel, vol. 82, no. 11, pp.
1411-1417, Jul. 2003.
[9] P. Amatachaya and B. Krittacom, "The combustion of liquid fuels using a
packed bed", in Proc. of International Conference on Power Engineering
2009 (ICOPE-09), Kobe, JAPAN.
[10] K. Kamiuto and S. S. Yee, "Correlated radiative transfer through a packed
bed of opaque sphere, International Communications in Heat and mass
Transfer, vol. 32, no. 1-2, pp. 133-139, Jan. 2005.
[11] K. Annamalai and I.K. Puri, Combustion Science and Engineering, New
York, CRC Press, 2007, ch. 4.