Comparison of low temperature mixed refrigerant cycles for separation systems
Open accessAbstract
Numerous mixed refrigerant cycles (MRCs) were developed in the past several decades in different applications. In this paper, two sets of low temperature MRCs are developed and simulated for a typical olefin plant utilizing a mixture of methane, ethane, propane and nitrogen as cycle working fluid to replace the pure ethylene refrigeration cycle that is used in conjunction with propylene refrigeration cycle in conventional plants. The key parameters of the cycles including mixture compositions and operating pressure levels are optimized to meet the objective of minimum shaftwork in compressor. The results show that different cycle configuration has different optimal mixture composition and low and high operating pressures. The results of exergy analysis reveal that the main location of the exergy loss in the cycles is the heat exchanger system. Also, the Carnot factor versus heat flow diagram is provided to identify the distribution of inefficiencies in the heat exchangers for each cycle. The simulation results show that MRCs can improve the thermodynamic performance of refrigeration system using the optimal working fluid mixture composition, optimal high and low operating pressures and optimal arrangement of the cycle components. Copyright © 2008 John Wiley & Sons, Ltd.
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The essential instruments in the targeting phase of CPEA are exergy composite diagrams (ECCs) and exergy grand composite diagrams (EGCCs), which are obtained by replacing the temperature axis in the CCs and GCCs with the Carnot factor.
“The essential instruments in the targeting phase of CPEA are exergy composite diagrams (ECCs) and exergy grand composite diagrams (EGCCs), which are obtained by replacing the temperature axis in the CCs and GCCs with the Carnot factor .283,307−310”
From Strategies To Improve the Performance of Hydrogen Storage Systems by Liquefaction Methods: A Comprehensive Review (2023) · cites this paper as [283]
Section 5 (page not available in our copy) says that replacing temperature with the Carnot factor in composite curves produces exergy composite curves (ECCs), which the authors use in an exergy-loss targeting analysis. The paper discusses grand composite curves separately in Section 2, but the passages do not describe exergy grand composite curves (EGCCs) or identify ECCs and EGCCs together as essential instruments in CPEA targeting. (LLM, conf=0.87)
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Cites
Gong, M. Q., Wu, J. F., & Luo, E. G. (2004) · Cryogenics · doi:10.1016/j.cryogenics.2004.05.004 · Cited by 83 · see citing works
Exergy analysis of multistage cascade low temperature refrigeration systems used in olefin plants
Mafi, M., Naeynian, S. M. M., & Amidpour, M. (2009) · International Journal of Refrigeration · doi:10.1016/j.ijrefrig.2008.05.008 · Cited by 73 · see citing works
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Cited by
Sorted by citations
Ghorbani, B., Zendehboudi, S., Saady, N. M. C., Duan, X., & Albayati, T. M. (2023) · ACS Omega · doi:10.1021/acsomega.3c01072 · Cited by 121 · see citing works
- Authors
- Mafi, M., Amidpour, M., & Mousavi Naeynian, S. M.
- Affiliations
- K. N. Toosi University of Technology (IR)
- Corresponding author
- Amidpour, M.
- ORCID
- Venue
- International Journal of Energy Research
- Publisher
- Hindawi Limited
- Published
- 2009-03-25
- Volume
- 33
- Issue
- 4
- Pages
- 358-377
- ISSN
- 0363-907X (ISSN-L)
- 1099-114X
- OpenAlex
- W1965607045
- Cited by
- 16
- References
- 2
- Citations by year
- 2026: 1 · 2025: 2 · 2024: 1 · 2023: 1 · 2022: 2 · 2021: 3 · 2020: 1 · 2018: 2 · 2017: 1 · 2014: 1
- FWCI
- 0.71
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- International Journal of Energy Research (publishedVersion)
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › Refrigeration and Air Conditioning Technologies
- Physical Sciences › Engineering › Mechanical Engineering › Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Physical Sciences › Engineering › Control and Systems Engineering › Process Optimization and Integration
- Keywords
- mixed refrigerant cycle, low-temperature refrigeration, olefin separation, exergy analysis, cycle configuration
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