The single cycle mixed-fluid LNG (PRICO) process is the most widely used for natural gas liquefaction. But the optimized energy consumption of single mixed refrigerant (SMR) liquefaction process was still high using the existing energy saving optimization method. The main purpose of this study was to propose an optimization method to combine with the combination optimization of important parameters to improve the system energy efficiency for the SMR structure. The liquefaction process with an initial investment increase of only 6% was designed, by adding initial investment including separator, valve, mixer, etc. The genetic algorithm and liquefaction simulation were used to analyxze the combination optimization of multiple parameters, such as the component ratio of the mixed refrigerant and the pressure of the liquefaction circulation node. Finally, by comparing the similar liquefaction process, it can be found that the optimized heat exchanger internal hot and cold complex curve was better matched, thus reducing the energy Irreversible loss. It indicated that operation energy consumption of the improved SMR process, of which the specific energy consumption could reach 0.247kW·h/kg, was 10.24% lower than PRICO, and the total energy consumption was decreased by 2%. It is thus clear that the optimization method of liquefaction process design and parameter combination has great energy saving efficiency.
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References
He T., Liu Z., Ju Y. et al. A comprehensive optimization and comparison of modified single mixed refrigerant and parallel nitrogen expansion liquefaction process for small-scale mobile LNG plant. Energy 167:1-12 (2019).
Jin C., Son H., Lim Y. Optimization and economic analysis of liquefaction processes for offshore units. Applied Thermal Engineering 163:114334 (2019).
He T., Karimi I.A., Ju Y. Review on the design and optimization of natural gas liquefaction processes for onshore and offshore applications. Chemical Engineering Research and Design 132:89-114 (2018).
Nguyen T.-V., Rothuizen E.D., Markussen W.B. et al. Thermodynamic comparison of three small-scale gas liquefaction systems. Applied Thermal Engineering 128:712-724 (2018).
Nikkho S., Abbasi M., Zahirifar J. et al. Energy and exergy investigation of two modified single mixed refrigerant processes for natural gas liquefaction. Computers & Chemical Engineering 140:106854 (2020).
Tak K., Lee I., Kwon H. et al. Comparison of Multistage Compression Configurations for Single Mixed Refrigerant Processes. Industrial & Engineering Chemistry Research 54:9992-10000 (2015).
Almeida-Trasvina F., Smith R. Structural Modifications on Single Mixed Refrigerant Cycles for Performance Improvements in Small-Scale LNG Processes. Industrial & Engineering Chemistry Research 61:2825-2842 (2022).
Qyyum M. A., He T., Qadeer K. et al. Dual-effect single-mixed refrigeration cycle: An innovative alternative process for energy-efficient and cost-effective natural gas liquefaction. Applied Energy 268:115-122 (2020).
Wang X., Li M., Cai L. et al. Propane and iso-butane pre-cooled mixed refrigerant liquefaction process for small-scale skid-mounted natural gas liquefaction. Applied Energy 275:115333 (2020).
Aspelund A., Gundersen T., Myklebust J. et al. An optimization-simulation model for a simple LNG process. Computers & Chemical Engineering 34:1606-1617 (2010).
Khan M.S., Lee M. Design optimization of single mixed refrigerant natural gas liquefaction process using the particle swarm paradigm with nonlinear constraints. Energy 49:146-155 (2013).
Yuan X., Wang P., Yuan Y. et al. A new quantum inspired chaotic artificial bee colony algorithm for optimal power flow problem. Energy Conversion and Management 100:1-9 (2015).
He T., Ju Y. Design and Optimization of a Novel Mixed Refrigerant Cycle Integrated with NGL Recovery Process for Small-Scale LNG Plant. Industrial & Engineering Chemistry Research 53:5545-5553 (2014).
Ebrahimi A., Tamnanloo J., Mousavi S.H. et al. Discrete-Continuous Genetic Algorithm for Designing a Mixed Refrigerant Cryogenic Process. Industrial & Engineering Chemistry Research 60:7700-7713 (2021).
Nikkho S., Abbasi M., Zahirifar J. et al. Energy and exergy investigation of two modified single mixed refrigerant processes for natural gas liquefaction[J]. Computers & Chemical Engineering140: 106-124(2020).
He T., Mao N., Liu Z. et al. Impact of mixed refrigerant selection on energy and exergy performance of natural gas liquefaction processes. Energy 199:117378 (2020).
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This project is supported by basic research project of provincial science and technology department, and the contract No. is “Guizhou Science and Technology Foundation [2020]1Y217”.
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 1, pp.102–107 January–February, 2023.
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Deng, Z., An, J. A New Re-Liquefaction System for Dynamic Boil-Off Recovery Based on Single Mixed Refrigerant. Chem Technol Fuels Oils 59, 131–140 (2023). https://doi.org/10.1007/s10553-023-01511-x
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DOI: https://doi.org/10.1007/s10553-023-01511-x