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Research Papers: Energy Systems Analysis

Exergetic Analysis and Assessment of Industrial Furnaces

[+] Author and Article Information
Hakan Caliskan

Department of Mechanical Engineering, Faculty of Engineering, Usak University, Usak TR-64200, Turkeyhakan.caliskan@usak.edu.tr

Arif Hepbasli1

Department of Mechanical Engineering, Faculty of Engineering, Ege University, Bornova, Izmir TR-35100, Turkeyarif.hepbasli@ege.edu.tr

1

Corresponding author. Visiting Professor, King Saud University, Saudi Arabia.

J. Energy Resour. Technol 132(1), 012001 (Mar 26, 2010) (7 pages) doi:10.1115/1.4001144 History: Received April 14, 2009; Revised January 26, 2010; Published March 26, 2010; Online March 26, 2010

This study presents exergy analysis of a natural gas-fired radiant tube-heating furnace. In the analysis, actual data over a test period of 3 h were used. Exergy efficiencies, destructions, losses, and entropy generation of the furnace were determined. For an average furnace temperature of 666.6°C, average exergy efficiency value was calculated to be 9.6%. The exergy destruction rate was obtained to be 5.34 kW while exergy rates of the flue gases, exergy losses, and exergy steel were 12.53 kW, 44.28 kW, and 6.6 kW, respectively. On the other hand, the exergy rate of the product (steel) was found to be between 4.61 kW and 9.88 kW over the 15 min test periods, and it reached a maximum rate at the end of the second hour.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic layout of the radiant tube-heating furnace (10)

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Figure 2

Temperature changing for various analysis times of the system (10)

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Figure 3

Control volume of the furnace

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Figure 4

Energy flow diagram of the furnace

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Figure 5

Exergy loss and flow (Grassmann) diagram of the system (average)

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Figure 6

Exergy variation rate of the steel with process duration

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