Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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CHANGES IN STAGNATION REGION AND RESIDENCE TIME OF COOLING WATER FOR VARIOUS FLOW CHANNEL GEOMETRY OF WATER COOLING GRATE

수냉식 화격자 유로 형상에 따른 냉각수의 정체 영역 및 체류 시간 변화

  • Song, D.K. (Environmental and Energy Systems Research Div., Korea Institute of Machinery and Materials) ;
  • Kim, S.B. (Environmental and Energy Systems Research Div., Korea Institute of Machinery and Materials) ;
  • Park, D.W. (GEQ Solution)
  • 송동근 (한국기계연구원 환경에너지기계연구본부) ;
  • 김상복 (한국기계연구원 환경에너지기계연구본부) ;
  • 박도원 (지이큐솔루션)
  • Received : 2016.05.25
  • Accepted : 2016.06.16
  • Published : 2016.06.30
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Abstract

Waste-to-energy facilities including incinerators are known as an efficient method to reduce wastes. In waste-to-energy facilities, more efficient cooling system is still needed for grates as the energy density of waste increased. For better cooling performance with the water-cooled grates, optimal design of cooling water pathways is highly beneficial. We performed numerical investigation on fluid flow and residence time of cooling water with change of the geometry of the cooling water pathway. With addition of round shaped guide vanes in the water pathway, the maximum residence time of flow is reduced(from 4.3 sec. to 2.4 sec.), but there is no significant difference in pressure drop between inlet and outlet, and average residence time at the outlet. Furthermore the flow stagnation region moves to the outlet, as the position of the round shaped guide vanes is located to the neck point of pathways.

Keywords

References

  1. 2003, Adams, B., Eeraerts, D. and Christiaens, I., "Design, Construction, Start-up and Commissioning of a State-of-the-Art Water-Cooled Grate WtE-Plant for Orebro, Sweden," Proc. of NAWTEC11, Florida, USA..
  2. 2010, Owens, E.M. and Szczepkowski, J., "Advancements in Grate Cooling Technology," Proc. of the 18th Annual North American Waste-to-Energy Conference, Florida, USA..
  3. 1996, Kim, S., Shin, D. and Choi, S., "Comparative Evaluation of Municipal Solid Waste Incinerator Design by Flow Simulation," Combust. Flame, Vol.106, pp.241-251. https://doi.org/10.1016/0010-2180(95)00190-5
  4. 2003, Shin, D., Hwang, J., Baek, I. and Jung, S., "An Evaluation Study on Combustion and Thermal Flow Characteristics of G+R Type Incinerator," (in Korean) Proc. The Korean Society of Combustion(KOSCO) Symposium, pp.111-117.
  5. 1994, Ryu, C.K., Kim, S.K. and Choi, S., "A cold Flow Experimental for the Incinerator Shape Design," (in Korean) Trans. Korean Soc. Mech. Eng. B, Vol.18, No.8, pp.2184-2193.
  6. 2013, Jang, J.H., Ahn, J. and Kim, J.J., "Combustion & Heat Transfer Characteristics inside a Combustion Chamber of 13-Step-Grate Wood Pellet Firing Boiler," (in Korean) Proc. KSCFE Spring Annual meeting, pp.73-77.
  7. 2014, Ahn, J. and Jang, J.H., "CFD (Computational Fluid Dynamics) Study on Partial-Load Combustion Characteristics of a 4-Step-Grate Wood Pellet Boiler," (in Korean) Trans. Korean Soc. Mech. Eng. B, Vol.38, No.4, pp.365-371. https://doi.org/10.3795/KSME-B.2014.38.4.365
  8. 2012, Davis, P., Rinehimer, A. and Uddin, M., "A Comparison of RANSBased Turbulence Modeling for Flow Over a Wall-Mounted Square Cylinder," 20th Annual Conference of the CFD Society of Canada, Canmore, AL, Canada, May 9-12.
  9. 2016, Halawa, T., Gadala, M.S., Alqaradawi, M. and Badr, O., "Influence of Changing Casing Groove Parameters on the Performance of Centrifugal Compressors Near Stall Condition," Trans. ASME J. Fluid Eng., Vol.138, No.2, 021104.
  10. 2009, Chanteloup, V. and Mirade, P., "Computational fluid dynamics (CFD) modelling of local mean age of air distribution in forced-ventilation food plants," J. Food Eng., Vol.90, pp.90-103. https://doi.org/10.1016/j.jfoodeng.2008.06.014
  11. 2010, Liu, M. and Tilton, J.N., "Spatial Distributions of Mean Age and Higher Moments in Steady Continuous Flows," AIChE Journal, Vol.56, No.10, pp.2561-2572. https://doi.org/10.1002/aic.12151

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  1. Numerical investigation on residence time of cooling water and surface temperature distribution of water-cooled grates vol.32, pp.3, 2018, https://doi.org/10.1007/s12206-018-0207-8