In a refinery distillation plant, there are many components of interest to be analyzed thermodynamically, e.g., the crude oil heating furnace, the distillation column and a network of heat exchangers. Previous studies showed that the highest exergy losses occur when there is a heat transfer process especially in the crude oil heating furnace where high quality fuel is used to heat the crude oil, which is a low quality duty, beside the high temperature difference. Therefore, it is proposed in this work to perform distillation in two stages rather than one to reduce heat duty of the heating furnace and thus reducing irreversible losses. In this paper, energy and exergy analyses of a traditional one-stage crude oil distillation unit and a newly proposed two-stage crude oil distillation unit are conducted to study energy and exergy efficiencies of these units and determine the exergy losses. The results are compared for both one- and two-stage distillation units. In this regard, a commercial software package, SimSci/PRO II program is used to carry out both energy and exergy calculations. It is found that the overall exergy efficiencies for single- and two-stage distillation units are 14.0% and 31.5%, respectively. The proposed two-stage distillation unit shows 43.8% decrease in the overall exergy losses and 125% increase in the overall exergy efficiency.
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e-mail: Ibrahim.Dincer@uoit.ca
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September 2003
Technical Papers
Exergy Analysis of Single- and Two-Stage Crude Oil Distillation Units
Husain Al-Muslim,
Husain Al-Muslim
Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
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Ibrahim Dincer,
e-mail: Ibrahim.Dincer@uoit.ca
Ibrahim Dincer
Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
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Syed M. Zubair
Syed M. Zubair
Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
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Husain Al-Muslim
Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
Ibrahim Dincer
Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
e-mail: Ibrahim.Dincer@uoit.ca
Syed M. Zubair
Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
Contributed by the Advanced Energy Systems Division for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received at the AES Division, Jul. 2002; revised manuscript received May 2003. Associate Editor: A. M. Jacobi.
J. Energy Resour. Technol. Sep 2003, 125(3): 199-207 (9 pages)
Published Online: August 29, 2003
Article history
Received:
July 1, 2002
Revised:
May 1, 2003
Online:
August 29, 2003
Citation
Al-Muslim , H., Dincer, I., and Zubair , S. M. (August 29, 2003). "Exergy Analysis of Single- and Two-Stage Crude Oil Distillation Units ." ASME. J. Energy Resour. Technol. September 2003; 125(3): 199–207. https://doi.org/10.1115/1.1595670
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