Inverse heat transfer prediction of the state of the brick wall of a melting furnace. (5th January 2017)

• Record Type: Journal Article
• Authors: Hafid, Mohamed; Lacroix, Marcel
• Is Part Of: Applied thermal engineering. Volume 110(2017:Jan.)
• Page Start: 265
• Page End: 274
• Publication Date: 2017-01-05
• Subjects: Inverse method -- Solid-liquid phase change -- Levenberg–Marquardt method -- Broyden method -- Melting furnace; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2016.08.162
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: A non-isothermal solid/liquid phase change process is developed. The Levenberg-Marquardt-Method combined with the Broyden-Method is adopted. A Finite-Volume Model (FVM) of melting furnace is elaborated. The characteristics of the brick wall and of the temperature sensor are examined. The erosion of melting furnace is investigated. Abstract: An inverse heat transfer method for predicting the state of the lateral refractory brick wall of a melting furnace is presented. By collecting temperature data with a thermocouple embedded into the brick wall, the inverse method is able to predict (1) the time-varying thickness of the protective bank that covers the inner lining of the furnace wall; (2) the thermal contact resistance between the inner lining and the protective bank; and (3) the possible erosion of the refractory brick wall. The inverse procedure rests on the Levenberg Marquardt algorithm combined with the Broyden method. The effect (1) of the noise on the collected temperature data; (2) of the thermal diffusivity of the brick wall; (3) of the location of the embedded temperature sensor; and (4) of the Biot number on the inverse predictions is investigated. Recommendations are made for the optimum position of the embedded sensor and its operation.