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Journal of Energy
Volume 2014 (2014), Article ID 620695, 9 pages
http://dx.doi.org/10.1155/2014/620695
Research Article

Minimizing Energy Cost in Electric Arc Furnace Steel Making by Optimal Control Designs

1Department of Electrical and Computer Engineering, University of Iowa, Iowa City, LA 52242, USA
2School of Electronics, Electrical Engineering and Computer Science, Queen’s University, Belfast BT7 1NN, UK

Received 30 September 2013; Revised 23 December 2013; Accepted 14 January 2014; Published 20 February 2014

Academic Editor: Qilian Liang

Copyright © 2014 Er-wei Bai. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Production cost in steel industry is a challenge issue and energy optimization is an important part. This paper proposes an optimal control design aiming at minimizing the production cost of the electric arc furnace steel making. In particular, it is shown that with the structure of an electric arc furnace, the production cost which is a linear programming problem can be solved by the tools of linear quadratic regulation control design that not only provides an optimal solution but also is in a feedback form. Modeling and control designs are validated by the actual production data sets.