This paper presents results for the minimization of fuel consumption in a batch furnace. Several different criteria are used and minimized with respect to time-dependent process and control variables. As would be expected, the results show that globally there is no significant difference between the solutions found (i.e., the same minimum fuel consumption results) when the choice of criterion is either energy, exergy, exergy destruction, entropy creation of the system and entropy creation of the system plus environment. However, the specific details or local results of each solution (i.e., the heating strategies) are, in fact, quite different. These differences cannot simply be attributed to numerical error (round-off and truncation). What they show is that multiple optimum strategies satisfy the same global optimum. The advantage of one over the other may simply be that from a practical standpoint some are easier to implement than others. Nonetheless, regardless of the strategy used, employing an optimum one raises the possibility of significant reductions in overall fuel consumption in these and other types of furnaces.
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September 1998
Technical Papers
Application of the First and Second Laws to Fuel Minimization in a Batch Furnace
M. R. von Spakovsky,
M. R. von Spakovsky
Energy Management Institute (EMI), Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
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E. S. Geskin
E. S. Geskin
Department of Mechanical Engineering, New Jersey Institute of Technology, Newark, NJ 07102
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M. R. von Spakovsky
Energy Management Institute (EMI), Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
E. S. Geskin
Department of Mechanical Engineering, New Jersey Institute of Technology, Newark, NJ 07102
J. Energy Resour. Technol. Sep 1998, 120(3): 219-225 (7 pages)
Published Online: September 1, 1998
Article history
Received:
October 15, 1997
Revised:
January 26, 1998
Online:
November 6, 2007
Citation
von Spakovsky, M. R., and Geskin, E. S. (September 1, 1998). "Application of the First and Second Laws to Fuel Minimization in a Batch Furnace." ASME. J. Energy Resour. Technol. September 1998; 120(3): 219–225. https://doi.org/10.1115/1.2795039
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