Thermodynamic analysis of liquefied natural gas (LNG) production cycle in APCI process

Nezhad, Shahrooz Abbasi; Shabani, Bezhan; Soleimani, Majid

doi:10.1007/s11630-012-0582-x

Cited by 6 publications

(4 citation statements)

References 7 publications

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“…Therefore, the simulation results can be applied to different refrigeration cycles by using the following equation: The COP of the C3MR refrigeration cycle is reported as 2.13 and that for the Cascade refrigeration cycle as 1.26 . Another value of 1.795 for the COP of typical C3MR process is reported . A COP value of 2 is used for the calculations of energy requirements and illustrations in the plots.…”

Section: Process Simulation and Calculation Methodsmentioning

confidence: 99%

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Dynamic Simulation Study for Boil-off Gas Minimization at Liquefied Natural Gas Exporting Terminals

Kurle

Паланки

2017

Ind. Eng. Chem. Res.

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The boil-off gas (BOG) generation at LNG (liquefied natural gas) exporting terminals is significant and should be minimized and/or recycled efficiently and effectively. In this work, the study of BOG generation, minimization, and recovery has been performed for a typical LNG plant with C3MR (propane precooled mixed refrigerant) process, storage facility, loading facility, and LNG ship with four moss-type spherical tanks. Plant-wide dynamic simulations are employed to quantify dynamic BOG generations during loading and holding mode, under various LNG temperatures at LNG exporting terminals. On the basis of multiple case studies, optimum LNG temperatures under different LNG subcooling and BOG recovery strategies have been identified for the sake of total energy consumptions. This study provides valuable information about the effect of LNG subcooling temperature on BOG generation, which would help in operating LNG plants at optimum conditions and economically minimize BOG generation and recovering BOG at LNG exporting terminals. Conceivably, the resultant benefits are not only for the environmental sustainability (reduce emissions), but also for the LNG industry sustainability (save raw materials/energy and increase productivity).

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Section: Process Simulation and Calculation Methodsmentioning

confidence: 99%

“…37 Another value of 1.795 for the COP of typical C3MR process is reported. 38 A COP value of 2 is used for the calculations of energy requirements and illustrations in the plots. However, a range of optimum LNG temperatures is also given for the COP range of 1 to 5.…”

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 99%

Dynamic Simulation Study for Boil-off Gas Minimization at Liquefied Natural Gas Exporting Terminals

Kurle

Паланки

2017

Ind. Eng. Chem. Res.

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“…LNG is a cryogenic liquid at -163 °C, which needs to be heated to about room temperature before being sent to the marine main engine for combustion [1]. Generally, the cylinder liner water of marine main engine is used for heating, which not only wastes the heat source of the ship, but also causes the cold energy of LNG cannot be fully utilized.…”

Section: Introductionmentioning

confidence: 99%

System design and analysis of refrigerated containers utilizing LNG cold energy

Yang¹,

Yue

Lin

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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In order to solve the problems of excess cold energy of the fuel and large power load required for refrigeration of refrigerated containers on LNG powered container ships, this study proposes a scheme to use the fuel cold energy of LNG powered container ships for refrigerated containers, the process simulation software Aspen HYSYS is used to simulate the cold energy utilization scheme, with the help of MATLAB, the multivariable optimization research on the cold energy utilization scheme of LNG powered container ship is carried out, taking the cold energy utilization rate of LNG cold energy scheme as the objective function, the LNG cold energy utilization scheme is optimized.

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“…Such ships are referred to as “LNG powered ship.” The temperature of LNG is as low as −163°C, before being sent to the main engine of the ship for combustion, it needs to use the cylinder jacket heating water for vaporization to the supply air temperature of the main engine of the ship. 5,6 In this process, not only a large amount of cold energy will be released (830–860 kJ/kg), 7–9 it will also consume a lot of heat, and most of this part of cold energy cannot be used at present. 10–12 Therefore, there is a problem of excess fuel cold energy on large-scale LNG powered container ships.…”

Section: Introductionmentioning

confidence: 99%

Research on the utilization of fuel cold energy for LNG powered container ships

Lin

Cui

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part M:

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Aiming at the problems that the fuel releases a lot of cold energy and the refrigerated containers consume a lot of electricity on large LNG powered container ships, a set of cold energy cascade utilization scheme that mainly uses LNG cold energy for refrigerated containers is designed. The simulation software Aspen HYSYS is used to establish and simulate the process of the ship’s cold energy cascade utilization system under five different working conditions, and the main parameters of the key nodes are obtained, according to the established exergy efficiency model, the exergy efficiency of the main equipment and the whole system is solved. Under the five working conditions, the maximum exergy efficiency of the refrigerated container system before optimization is 24.54%, at this time, the exergy efficiency of the entire cold energy utilization system is 24.86%. With the goal of improving the exergy efficiency of the entire system, using a hierarchical optimization method, the key parameters affecting the exergy efficiency of each cold energy utilization module are analyzed and optimized respectively, and the optimal operating parameters of different cold energy utilization module were determined. So as to realize the optimization of the whole cold energy cascade utilization system. The results show that the exergy efficiency of the optimized LNG cold energy cascade utilization system for ships under five working conditions is improved, under the 65% working condition, the exergy efficiency of the optimized refrigerated container system is 27.69%, and the exergy efficiency of the whole cold energy utilization system is 28.04%, which are increased by 3.15% and 3.18% respectively. Which proves that the LNG cold energy cascade utilization system can realize the effective utilization of LNG cold energy.

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Thermodynamic analysis of liquefied natural gas (LNG) production cycle in APCI process

Cited by 6 publications

References 7 publications

Dynamic Simulation Study for Boil-off Gas Minimization at Liquefied Natural Gas Exporting Terminals

Dynamic Simulation Study for Boil-off Gas Minimization at Liquefied Natural Gas Exporting Terminals

System design and analysis of refrigerated containers utilizing LNG cold energy

Research on the utilization of fuel cold energy for LNG powered container ships

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