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- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
- Publication history
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Received July 12, 2023
Revised September 1, 2023
Accepted September 2, 2023
- Acknowledgements
- The authors gratefully acknowledge the financial support of the SNGPL Chair of Gas Engineering in the Department of Chemical Engineering, University of Engineering & Technology, Lahore
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Exergoeconomic analysis of an LNG integrated - air separation process
1Department of Chemical Engineering, University of Engineering and Technology, Lahore 54890, Pakistan 2Department of Chemical Engineering, University of Engineering and Technology, Lahore 54890, Pakistan
faheem@uet.edu.pk
Korean Journal of Chemical Engineering, December 2023, 40(12), 3017-3028(12), 10.1007/s11814-023-1567-z
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Abstract
An integrated LNG regasification - air separation process is investigated using exergy and exergoeconomic
analyses. The objective of developing this integrated process is to lower the calorific value of LNG by mixing regasified
LNG with high purity nitrogen, while simultaneously recovering and utilizing valuable cryogenic energy from the LNG
during its regasification to minimize the power consumption of the air separation unit (ASU) for nitrogen production.
The overall exergy efficiency and exergy destruction of the integrated process are 76.47% and 28.52 MW, respectively,
with the compression section causing the most exergy destruction. Further exergoeconomic analysis of the proposed
process reveals that the air compressors have the highest capital investment (CI) and operating and maintenance (O&M)
cost rates, the pumps for cooling water and LNG have the highest exergoeconomic factors, and the low-pressure column and a multistream heat exchanger have the highest exergy destruction cost rates. A parametric study is also conducted to examine the impact of economic variables including interest rate, plant life, and compressor performance on
exergy destruction, CI and O&M cost rates, and exergoeconomic factor. The findings of this study offer valuable
insight into the design and optimization of similar integrated processes, with potential benefits for the energy industry.
Keywords
References
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58. M. H. Hamayun, M. Hussain, I. Shafiq, A. Ahmed and Y.-K. Park,Environ. Eng. Res., 27, 200683 (2022).
59. B. B. Kanbur, L. Xiang, S. Dubey, F. H. Choo and F. Duan, Renew.Sust. Energy Rev., 79, 1171 (2017).
60. V. M. Ambriz-Díaz, C. Rubio-Maya, E. Ruiz-Casanova, J. MartínezPatiño and E. Pastor-Martínez, Energy Convers. Manage., 203,112227 (2020).
61. C. J. Okereke, O. Lasode and I. O. Ohijeagbon, Heliyon, 6, e04402 (2020).
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66. R. Turton, R. C. Bailie, W. B. Whiting, J. A. Shaeiwitz and D. Bhattacharyya, Analysis, synthesis, and design of chemical processes, 4th
ed., Prentice Hall (2012).
67. G. Tsatsaronis, Int. J. Exergy, 5, 489 (2008).
68. M. Ameri, P. Ahmadi and A. Hamidi, Int. J. Energy Res., 33, 499 (2009).
69. C. Uysal, Environ. Prog. Sust. Energy, 39, e13297 (2020).
