Title: Investigation of effect of varying dead-state temperatures on energy and exergy efficiencies of a Raw Mill process in a cement plant

Authors: Ziya Sogut, Zuhal Oktay, Arif Hepbasli

Addresses: Technical Sciences Department, Turkish Military Academy, 06651 Ankara, Turkey. ' Faculty of Engineering, Mechanical Engineering Department, Balikesir University, 10600 Balikesir, Turkey. ' Faculty of Engineering, Mechanical Engineering Department, Ege University, Bornova, 35100 Izmir, Turkey

Abstract: Dead-state temperature directly affects the exergy efficiency of thermal systems. The main objectives of the present study are twofold, namely, to investigate the effects of varying dead-state temperatures on the energy and exergy analyses of a Raw Mill in a cement plant; to examine the sensitivity of the energy and exergy analyses results, calculated according to the varying dead-state temperatures. The exergy efficiency values ranged from 44.5% to 18.4% at varying dead-state temperature values between −18°C and 41°C. The sensitivity analyses results have indicated that varying dead-state temperatures have an effect on the exergy efficiency.

Keywords: dead-state temperatures; energy efficiency; exergy efficiency; raw mills; reference state; sensitivity; cement plants.

DOI: 10.1504/IJEX.2009.027495

International Journal of Exergy, 2009 Vol.6 No.5, pp.655 - 670

Published online: 28 Jul 2009 *

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