Abstract
A heat transfer model of furnace roller cooling process was established based on analysis of furnace roller’s structure. The complicated model was solved with iteration planning algorithm based on Newton search. The model is proved logical and credible by comparing calculated results and measured data. Then, the relationship between water flow velocity, inlet water temperature, furnace temperature and roller cross section temperature, outlet water temperature, water temperature rise, cooling water heat absorption was studied. The conclusions and recommendations are mainly as follows: 1) Cooling water temperature rise decreases with the increase of water flow velocity, but it has small relationship with inlet water temperature; 2) In order to get little water scale, inlet water temperature should be controlled below 30 °C. 3) The cooling water flow velocity should be greater than critical velocity. The critical velocity is 0.07 m/s and water flow velocity should be controlled within 0.4–0.8 m/s. Within this velocity range, water cooling efficiency is high and water temperature rise is little. If cooling water velocity increases again, heat loss will increase, leading to energy wasting.
Similar content being viewed by others
References
STEINBOECK A, GRAICHEN K, KUGI A. Dynamic optimization of a slab reheating furnace with consistent approximation of control variables [J]. IEEE Transactions on Control Systems Technology, 2011, 19(6): 1444–1456.
STEINBOECKA A, GRAICHENA K, WILDB D, KIEFERB T, KUGIA A. Model-based trajectory planning, optimization, and open-loop control of a continuous slab reheating furnace [J]. Journal of Process Control, 2011, 21: 279–292.
STEINBOECK A, WILD D, KIEFER T, KUGI A. A mathematical model of a slab reheating furnace with radiative heat transfer and non-participating gaseous media [J]. International Journal of Heat and Mass Transfer, 2010, 53(25/26): 5933–5946.
CHEN Wei-hsin, LIN Mu-rong, LEU Tzong-shyng. Optimal heating and energy management for slabs in a reheating furnace [J]. Journal of Marine Science and Technology, 2010, 18(1): 24–31.
GERMAN M L. Optimization of temperature regimes of walking-beam heating furnaces [J]. Journal of Engineering Physics and Thermophysics, 2006, 79(4): 736–740.
HAN S H, BAEK S W, KIM M Y. Transient radiative heating characteristics of slabs in a walking beam type reheating furnace [J]. International Journal of Heat and Mass Transfer, 2009, 52: 1005–1011.
JAKLIC A, VODE F, KOLENKO T. Online simulation model of the slab-reheating process in a pusher-type furnace [J]. Applied Thermal Engineering, 2007, 27(5/6): 1105–1114.
KIM M Y. A heat transfer model for the analysis of transient heating of the slab in a direct-fired walking beam type reheating furnace [J]. International Journal of Heat and Mass Transfer, 2007, 50(19): 3740–3748.
WILD D, MEURER T, KUGI A. Modelling and experimental model validation for a pusher-type reheating furnace [J]. Mathematical and Computer Modelling of Dynamical System, 2009, 15(3): 209–232.
SUZUKI M, KATSUKI K, IMURA J I, NAKAGAWA J, KUROKAWA T, AIHARA K. Modeling and real-time heating control of a reheating furnace using an advection equation [C]// SICE 2011 — 50th Annual Conference of the Society of Instrument and Control Engineers of Japan. Piscataway, NJ, USA: IEEE, 2011: 842–848.
WANG Ai-qun. Some problems in the designing of rollers for roller-hearth furnace [J]. Anhui Metallurgy, 2004, (3): 47–49. (in Chinese)
CHEN Da-xian. Standard handbook of machine design [M]. Beijing: Chemical Industry Press, 2003: 132–133. (in Chinese)
WU Wen-fei, FENG Yan-hui, ZHANG Xin-xin. Zonal method solution of radiative heat transfer in a one-dimensional long roller-hearth furnace in CSP [J]. Journal of University of Science and Technology Beijing: Mineral Metallurgy Materials, 2007, 14(4): 307–311.
WIKSTROM P, BLASIAK W, BERNTSSON F. Estimation of the transient surface temperature, heat flux and effective heat transfer coefficient of a slab in an industrial reheating furnace by using an inverse method [J]. Steel Research International, 2007, 78(1): 63–70.
STRATTON P F, SAXENA N, SULLIVAN J P. Using computer modeling to optimize the protective atmosphere for annealing of steel wire coils in a roller hearth furnace [J]. Wire Journal International, 1997, 30(8): 94–98.
YANG Shi-ming, TAO Wen-quan. Heat transfer [M]. Fourth Edition. Beijing: High Education Press, 2006: 243–251. (in Chinese)
GNIELINSKI V. New equations for heat and mass transfer in turbulent pipe and channel flows [J]. Int Chem Eng, 1976, 16: 359–368.
YUE Dan-ting. Engineering thermodynamics and heat transfer [M]. Dalian: Dalian Maritime University Press, 2002, 197–198. (in Chinese)
Author information
Authors and Affiliations
Corresponding author
Additional information
Foundation item: Project(2010CB630800) supported by the National Basic Research Program of China
Rights and permissions
About this article
Cite this article
Li, Y., Li, Jd., Liu, Yj. et al. Analysis and optimization of heat loss for water-cooled furnace roller. J. Cent. South Univ. 20, 2158–2164 (2013). https://doi.org/10.1007/s11771-013-1720-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11771-013-1720-7