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Study on Zone Method Model and Ternary Method Model in Reheating Furnace

Author: YiZhi
Tutor: ChenHaiGeng
School: Northeastern University
Course: Thermal Power Engineering
Keywords: Duan Law Trigram Three -segment model
CLC: TK175
Type: Master's thesis
Year: 2008
Downloads: 75
Quote: 3
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Abstract


This paper established a two-dimensional model of the segment method , using multiple Gauss-Legendre integration method for solving the direct exchange of radiation each section area , and use the main element Gauss elimination method for solving the surface heat flux reflection section , and thus obtain total radiation exchange area matrix . Description section of the furnace heat exchange field energy balance equations, using the main variable correction method for solving ; billet heating process to the one-dimensional unsteady heat conduction equation , and using finite difference method . Both sets of equations inter- boundary conditions, namely coupling solution . In this paper, three yuan Model , still first radiation shield between segments , furnace gas segments of the energy equation is solved by Newton iteration method for solving them one by one according to the furnace airflow . Achieve a decoupling simplified. Reheating the same description and segment method . Taking into account paragraph France mechanism rigorous, high accuracy, in order to segment method for solving temperature field obtained as a benchmark, the model for the evaluation of the results three yuan , and three yuan model parameters ( currently first consider the furnace gas blackness εg) is corrected . Preliminary three yuan to improve model accuracy purposes. Trigram model for the segment between the radiation shield the assumption that \Simulation shows that the \Trigram model can be used as an auxiliary furnace line control model , this study helps to improve the accuracy of trigram run online .

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CLC: > Industrial Technology > Energy and Power Engineering > Thermal engineering, heat > Industrial thermal equipment > Industrial furnaces
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