Simulation and Optimization of NGE-MR Natural Gas Liquefaction Process

Abstract:

With the increased utilization of natural gas, there has been an increase in the research on peak-shaving natural gas liquefaction technologies. The NGE-MR natural gas liquefaction process, which precools natural gas with the cold energy generated by high pressure natural gas pipeline pressure energy recovery, is a promising technical candidate for peak-shaving LNG facilities. In this study, the effect of high pressure of the mixed refrigerant cycle (MRC) on the performance of the NGE-MR liquefaction process is analyzed under a fixed MRC pressure ratio. The result shows that for a certain mixed refrigerant composition, there is a corresponding optimal high pressure of the MRC, under which the minimum specific power of the liquefaction process could be obtained. The minimum specific power should be regarded as the evaluating indicator to represent the performance of the mixed refrigerant composition. Finally, the effect of mixed refrigerant composition on the performance of the NGE-MR liquefaction process is analyzed and the optimal operating conditions for the NGE-MR liquefaction process are obtained. As a result, the required specific power at the optimal operating conditions is less than 0.23 kW·h·kg^-1 and is decreased by about 24% compared with the specific power of C3-MR natural gas liquefaction process.

• Periodical: Applied Mechanics and Materials (Volume 391)
• Pages: 352-357
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.391.352
• Online since: September 2013
• Authors: Lei Zhang, Li Xin Che, Sheng Shan Bi, Hui Shi Wang, Jiang Tao Wu, Jia Qiao, Xian Yang Meng
• Keywords: Mixed Refrigerant Composition, NGE-MR Natural Gas Liquefaction Process, Optimization, Simulation

References

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