Comparative study of three boil-off gas treatment schemes: From an economic perspective

Bao, Junjiang; Yuan, Tong; Zhang, Lei; Zhang, Ning; Zhang, Xiaopeng

doi:10.1016/j.enconman.2019.112185

Cited by 22 publications

(2 citation statements)

References 59 publications

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“…At present, there are two main types of BOG recovery processes: the direct compression process and the reliquefaction process. [ 4 ] The BOG direct compression process requires less equipment and a small footprint, which applies to small‐scale LNG stations for peak‐shaving and emerging vehicle fuel markets. The reliquefaction process is generally used to recover the BOG in LNG‐receiving terminals.…”

Section: Introductionmentioning

confidence: 99%

Thermoeconomic Analysis and Optimization of a Combined Supercritical CO₂ Recompression Brayton/Kalina Cycle Driven by Boil‐Off Gas Combustion and Liquefied Natural Gas Cold Energy

Pan

Zhu

et al. 2023

Energy Tech

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The energy and costs required to reliquefy the boil‐off gas (BOG) produced in liquefied natural gas (LNG) tanks are enormous. At the same time, LNG releases large amounts of cold energy during the regasification process. To recover both the BOG and the LNG cold energy for power generation, herein, a novel system consisting of a supercritical carbon dioxide recompression Brayton cycle, an ammonia–water mixture Kalina cycle, a BOG combustion turbine cycle, and a natural gas turbine cycle is presented. The genetic algorithm with multiple elite saving is used to optimize the system thermoeconomic performance, and the maximum energy efficiency, exergy efficiency, and net present value of 65.49%, 33.88%, and 7.374 × 107 $ are obtained respectively. The nondominated sorting genetic algorithm II is implemented to achieve the multiobjective optimization, and the comprehensive performance analysis is carried out on this basis. The results show that heat exchangers and turbines account for the highest exergy destruction and total cost proportion with the value of 76.5% and 81.1% respectively. The heat transfer curves between LNG and working fluids are well matched, and the cooling capacity for ammonia liquefaction is the largest, accounting for 66.66%, which also generates 581.2 kW of power generation. The results also indicate that the LNG cold energy cascade utilization system combined with BOG combustion has excellent thermodynamic performance and can obtain ideal economic benefits.

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Section: Introductionmentioning

confidence: 99%

Thermoeconomic Analysis and Optimization of a Combined Supercritical CO₂ Recompression Brayton/Kalina Cycle Driven by Boil‐Off Gas Combustion and Liquefied Natural Gas Cold Energy

Pan

Zhu

et al. 2023

Energy Tech

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“…In other work, Kurle et al [29] suggested various BOG recovery strategies at LNG export terminals using steady-state simulations. Bao et al [15] proposed BOG recondensation integrated with an LNG cold energy power generation system. In this work, the BOG recondensation, through the organic Rankin cycle, electricity is sourced from the cold energy released from LNG regasification, thereby reducing the energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Study on Boil-off Gas (BOG) Minimization and Recovery Strategies from Actual Baseload LNG Export Terminal: Towards Sustainable LNG Chains

et al. 2021

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Boil-off Gas (BOG) generated at the liquefied natural gas (LNG) export terminal causes negative economic and environmental impacts. Thus, the objective of this study is to develop and evaluate various handling schemes to minimize and/or recover the generated BOG from an actual baseload LNG export terminal with a capacity of 554 million standard cubic feet per day (MMSCFD) of natural gas feed. The following three main scenarios were assessed: JBOG re-liquefaction, LNG sub-cooling, and lean fuel gas (LFG) reflux. For the LNG subcooling, two sub-cases were considered; standalone subcooling before LNG storage and subcooling in the prevailing liquefaction cycle. Steady-state models for these scenarios were simulated using Aspen Plus® based on a shortcut approach to quickly evaluate the proposed scenarios and determine the promising options that should be considered for further rigorous analysis. Results indicated that the flow of attainable excess LNG is 0.07, 0.03, and 0.022 million metric tons per annum (MTA) for the standalone LNG sub-cooling, LNG sub-cooling in the main cryogenic heat exchanger (MCHE), and both LFG-refluxing and jetty boil-off gas (JBOG) liquefaction, respectively. This in turn results in a profit of 24.58, 12.24, 8.14, and 7.63 million $/year for the LNG price of 7$ per Metric Million British Thermal Unit (MMBtu) of LNG.

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Design and Optimisation of Boil-off Gas Recycling Strategy in Liquefied Natural Gas Production

AlNouss

Al‐Sobhi

2022

Computer Aided Chemical Engineering

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Comparative study of three boil-off gas treatment schemes: From an economic perspective

Cited by 22 publications

References 59 publications

Thermoeconomic Analysis and Optimization of a Combined Supercritical CO₂ Recompression Brayton/Kalina Cycle Driven by Boil‐Off Gas Combustion and Liquefied Natural Gas Cold Energy

Thermoeconomic Analysis and Optimization of a Combined Supercritical CO₂ Recompression Brayton/Kalina Cycle Driven by Boil‐Off Gas Combustion and Liquefied Natural Gas Cold Energy

Study on Boil-off Gas (BOG) Minimization and Recovery Strategies from Actual Baseload LNG Export Terminal: Towards Sustainable LNG Chains

Design and Optimisation of Boil-off Gas Recycling Strategy in Liquefied Natural Gas Production

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Comparative study of three boil-off gas treatment schemes: From an economic perspective

Cited by 22 publications

References 59 publications

Thermoeconomic Analysis and Optimization of a Combined Supercritical CO2 Recompression Brayton/Kalina Cycle Driven by Boil‐Off Gas Combustion and Liquefied Natural Gas Cold Energy

Thermoeconomic Analysis and Optimization of a Combined Supercritical CO2 Recompression Brayton/Kalina Cycle Driven by Boil‐Off Gas Combustion and Liquefied Natural Gas Cold Energy

Study on Boil-off Gas (BOG) Minimization and Recovery Strategies from Actual Baseload LNG Export Terminal: Towards Sustainable LNG Chains

Design and Optimisation of Boil-off Gas Recycling Strategy in Liquefied Natural Gas Production

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Thermoeconomic Analysis and Optimization of a Combined Supercritical CO₂ Recompression Brayton/Kalina Cycle Driven by Boil‐Off Gas Combustion and Liquefied Natural Gas Cold Energy

Thermoeconomic Analysis and Optimization of a Combined Supercritical CO₂ Recompression Brayton/Kalina Cycle Driven by Boil‐Off Gas Combustion and Liquefied Natural Gas Cold Energy