| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1734665 | Energy | 2011 | 8 Pages |
The thermal efficiency of a reheating furnace was predicted by considering radiative heat transfer to the slabs and the furnace wall. The entire furnace was divided into fourteen sub-zones, and each sub-zone was assumed to be homogeneous in temperature distribution with one medium temperature and wall temperature, which were computed on the basis of the overall heat balance for all of the sub-zones. The thermal energy inflow, thermal energy outflow, heat generation by fuel combustion, heat loss by the skid system, and heat loss by radiation through the boundary of each sub-zone were considered to give the two temperatures of each sub-zone. The radiative heat transfer was solved by the FVM radiation method, and a blocked-off procedure was applied to the treatment of the slabs. The temperature field of a slab was calculated by solving the transient heat conduction equation with the boundary condition of impinging radiation heat flux from the hot combustion gas and furnace wall. Additionally, the slab heating characteristics and thermal behavior of the furnace were analyzed for various fuel feed conditions.
Research highlights► This is the first study which predicts wall and medium temperatures of a reheating furnace with only axial burners for a steel mill company by considering only radiation heat transfer. ► This study is also the first that predicts thermal efficiency of a reheating furnace with respect to fuel feeding conditions. ► The predictions of this study are found to be in favorable agreement with the measurement data from the thermal balance.
