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Analysis of aluminum plates under heating in electrical and natural gas furnaces

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  • Magalhães Sobrinho, Pedro
  • Carvalho, João A.
  • Luz Silveira, José
  • Magalhães Filho, Paulo

Abstract

This paper analyzes the thermal storage characteristics of aluminum plates in furnaces during their heating for lamination under two sources of heat: an electrical resistance bank and a combustion process carried out with natural gas. The set of equations to model the furnace under operation with electrical energy, for air as the fluid, is presented. This supports the theoretical analysis for the system under operation with natural gas combustion products. A numerical procedure, using the software ANSYS, is applied to determine the convection heat transfer coefficients for heating by the air flow. Temperatures measured in a plate inside a real furnace are used as parameters to determine these coefficients. Then convection and radiation heat transfer coefficients are determined for the natural gas combustion products. Results are compared, indicating a possible gain of 5.5 h in relation to a 19.5 h period of conventional electrical heating per plate.

Suggested Citation

  • Magalhães Sobrinho, Pedro & Carvalho, João A. & Luz Silveira, José & Magalhães Filho, Paulo, 2000. "Analysis of aluminum plates under heating in electrical and natural gas furnaces," Energy, Elsevier, vol. 25(10), pages 975-987.
    • Handle: RePEc:eee:energy:v:25:y:2000:i:10:p:975-987
    DOI: 10.1016/S0360-5442(00)00031-1
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    Cited by:

    1. Biswal, Pratibha & Basak, Tanmay, 2014. "Bejan's heatlines and numerical visualization of convective heat flow in differentially heated enclosures with concave/convex side walls," Energy, Elsevier, vol. 64(C), pages 69-94.
    2. Anandalakshmi, R. & Kaluri, Ram Satish & Basak, Tanmay, 2011. "Heatline based thermal management for natural convection within right-angled porous triangular enclosures with various thermal conditions of walls," Energy, Elsevier, vol. 36(8), pages 4879-4896.
    3. Oliveira, Flávio A.D. & Carvalho, João A. & Sobrinho, Pedro M. & de Castro, André, 2014. "Analysis of oxy-fuel combustion as an alternative to combustion with air in metal reheating furnaces," Energy, Elsevier, vol. 78(C), pages 290-297.

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