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- W4226458435 abstract "Abstract In view of the problem that the boil-off gas (BOG) generated by small LNG ships affects the transportation safety, three BOG re-liquefaction systems are improved, which are Case 1: serial nitrogen expansion re-liquefaction system (N2-BOG); Case 2: Single mixed refrigerant re-liquefaction system (SMR-BOG) and Case 3: Propane precooled mixed refrigerant re-liquefaction system (C3MR-BOG). The basic process is simulated in Aspen Plus and combined with the mathematical model built up in Matlab where the three cycles are optimized with the specific power consumption (SPC) as the objective function. The results show that the SPC of three cases are 0.8021 kWh/kg(LNG), 0.4150 kWh/kg(LNG) and 0.5063 kWh/kg(LNG); the coefficient of performance (COP) of Case 1 to Case 3 are 0.20, 0.39 and 0.30; the exergy efficiency of 36.56%, 70.66% and 57.93% along with the total product cost of 89.00 /h, 55.73/h and 77.54 $/h are achieved in Case 1 to 3, respectively. In addition, the overall exergy destruction of the cycles and each equipment are discussed, and the matching of the cold and heat sources of the multi-stream heat exchanger in the three systems is analyzed. In conclusion, under the condition that the BOG mass flow rate is 350kg/h, the improved SMR-BOG has advantages on thermodynamic performance and economic analysis, which makes it a better choice." @default.
- W4226458435 created "2022-05-05" @default.
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- W4226458435 date "2022-04-07" @default.
- W4226458435 modified "2023-09-27" @default.
- W4226458435 title "Numerical simulation and comparative analysis of three boil-off gas re-liquefaction systems" @default.
- W4226458435 doi "https://doi.org/10.1115/1.4054283" @default.
- W4226458435 hasPublicationYear "2022" @default.
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