Process Simulation and Analysis of BOG Re-liquefaction System for LNG Carrier

TIANJIN SCIENCE & TECHNOLOGY ›› 2023, Vol. 50 ›› Issue (3): 51-55.

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Process Simulation and Analysis of BOG Re-liquefaction System for LNG Carrier

ZHANG HaiTao, LIANG Bin, ZHU YongKai, ZHOU Yi, LI Meng

CNOOC Energy Technology & Services-Oil Production Services Co.,Tianjin 300452,China

Received:2023-03-01 Online:2023-03-25 Published:2023-12-27

Abstract

Abstract: BOG re-liquefaction system for LNG carriers is the most common way to deal with boil-off gas (BOG) in LNG-fueled ships. A re-liquefaction system based on the reverse Brayton cycle is the first choice for the re-liquefaction process owing to its compactness,simplicity,and safety. The BOG re-liquefaction process is modeled by process simulation software,and the effect of refrigerant flow and outlet pressure of compressor on the power consumption of the re-liquefaction system is studied,and the minimum flow of refrigerant under different outlet pressures is determined. In addition,the effect of seawater temperature on the re-liquefaction system is analyzed,and the results show that the system power consumption increases by 9 kW for every 1°C increase in seawater temperature.

Key words: LNG carrier, nitrogen refrigeration, BOG re-liquefaction, reverse Brayton cycle

CLC Number:

TB66

ZHANG HaiTao, LIANG Bin, ZHU YongKai, ZHOU Yi, LI Meng. Process Simulation and Analysis of BOG Re-liquefaction System for LNG Carrier[J]. TIANJIN SCIENCE & TECHNOLOGY, 2023, 50(3): 51-55.

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Process Simulation and Analysis of BOG Re-liquefaction System for LNG Carrier

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