Numerical Research in Effects of Baffles on Heat Transfer Characteristics of a Tunnel Kiln’s Flue Gas Heat Exchanger

Abstract:

In order to investigate effects of baffles on heat transfer characteristics of a tunnel kiln’s flue gas heat exchanger, the flow fields and temperature fields in two exchangers, one with baffles and the other without, under operative conditions, are separately simulated by using FLUENT code. According to simulation results, average temperature at the air outlet and average pressure at the air inlet of the exchanger with baffles are separately 67.2°C and 265 Pa, and those in the case of the exchanger without baffles are respectively 60.4°C and 240 Pa. Reasons why the baffles exert high influence on heat transfer characteristics of the exchanger are analyzed. On basis of the data and analysis, two conclusions are drawn: (1) Installation of baffles exerts high influence on heat transfer characteristics of the heat exchanger studied. (2) The reason why the baffles could exert such influence is that the baffles prevent much air from flowing into external zones of the baffles, so in per unit time more air exchanges heat energy with hot walls of heat exchange tubes, which are in internal zones of the baffles.

• Periodical: Advanced Materials Research (Volumes 953-954)
• Pages: 911-914
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.953-954.911
• Online since: June 2014
• Authors: Jie Li*
• Keywords: Baffles, Flow field and temperature field, Heat Exchanger of Flue Gas, Heat Transfer Characteristic, Numerical Simulation

References

[1] Hu Guolin: Considerations to Energy Conservation and Emission Reduction of Ceramic Industry. China Ceramic Industry, vol 16, no 2. pp.24-26, (2009).

[2] Zeng Lingke, Li Tao, etc.: Overview of Energy Saving Technology in Ceramic Industry. China Ceramic Industry, vol 15, no 3. pp.20-23, (2008).

[3] Jie Li, Hu Guolin, etc.: Heat Transfer Characteristics of a Tunnel Kiln's Flue Gas Heat Exchanger. Journal of Ceramics, vol 34, no 4. pp.482-486, (2013).

[4] Tao Wenquan: Numerical Heat Transfer, 2rd ed. Xi'an, Xi'an Jiaotong University Press (2001).

[5] FLUENT 6. 3 User's Guide. FLUENT Inc. (2006).

[6] Yu Yong: FLUNT'S Introduction and Advanced Tutorial. Beijing, Beijing Institute of Technology Press (2008).