Exergetic and economic evaluation of safety-related concepts for the regasification of LNG integrated into air separation processes

Tesch, Stefanie; Morosuk, Tatiana; Tsatsaronis, George

doi:10.1016/j.energy.2017.04.043

Cited by 28 publications

(5 citation statements)

References 7 publications

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“…The overall exergy efficiency of the integrated LNG regasification–air separation system developed in this work is 76.36%. This compares very favorably with the values obtained in similar studies reported in the literature, for example, 54.34, 54.91, 64.0, and 66.4% …”

Section: Resultssupporting

confidence: 90%

“…Integrated LNG regasification−air separation processes are already in operation in Japan, France, and Taiwan. 9,28 The cryogenic distillation of air is most commonly carried out in a two-column configuration. 29,30 Hamayun et al 31 have recently shown that a Petlyuk-like configuration is the most efficient design for this process.…”

Section: Introductionmentioning

confidence: 99%

“…Ethane, propane, butane, pentane, nitrogen, and carbon dioxide are present in smaller quantities . The LNG chain involves four processes: (1) natural gas liquefaction, (2) LNG transportation, (3) LNG storage and regasification, and (4) transmission and distribution to the end-users. , LNG is imported in Pakistan via marine routes using specially designed ships. It is then regasified and injected into the existing gas pipelines for onward transmission and use.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the requirement of high-purity nitrogen for the manipulation of the GCV of LNG can be simultaneously fulfilled. Integrated LNG regasification–air separation processes are already in operation in Japan, France, and Taiwan. , …”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Conventional and Advanced Exergy Analyses of an Integrated LNG Regasification–Air Separation Process

Hamayun

Ramzan

Hussain

et al. 2022

Ind. Eng. Chem. Res.

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Liquefied natural gas (LNG) is being imported in Pakistan to bridge the gap between the indigenous production and demand for natural gas. The calorific value of imported LNG must be lowered to meet the design requirements of the existing gas-fired power plants. This reduction in calorific value requires mixing with high-purity nitrogen, which can be obtained from the cryogenic distillation of air. Because imported LNG has a significant amount of cold energy and must be regasified/vaporized before injecting into the gas pipeline network, there is potential for recovering this cold energy by integrating the LNG regasification process with the cryogenic air separation process. To achieve these objectives, we developed an integrated LNG regasification–air separation process and compared it with the standalone air separation process. Conventional exergy analysis shows that the integrated process is better than the standalone air separation process both in terms of total power consumption and total exergy destruction ratio. The integrated process was further analyzed using advanced exergy analysis to identify the origin and nature of exergy destruction in the process. The results show that 44.3% of total exergy destruction in the process can be classified as avoidable. Moreover, 91.7% of the avoidable exergy destruction is of endogenous nature, showing that improving the efficiency of individual pieces of equipment should be the topmost priority for process improvement.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Conventional and Advanced Exergy Analyses of an Integrated LNG Regasification–Air Separation Process

Hamayun

Ramzan

Hussain

et al. 2022

Ind. Eng. Chem. Res.

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“…Fu et al 27 conducted a process analysis and optimization based on a complete equation-oriented approach. Tesch et al 28 evaluated the integration of LNG regasification into air separation processes to enhance the compression stage. An exergy and economic analysis was carried out using Aspen Plus.…”

Section: Introductionmentioning

confidence: 99%

Modular Framework for Simulation-Based Multi-objective Optimization of a Cryogenic Air Separation Unit

et al. 2022

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A framework to obtain optimal operating conditions is proposed for a cryogenic air separation unit case study. The optimization problem is formulated considering three objective functions, 11 decision variables, and two constraint setups. Different optimization algorithms simultaneously evaluate the conflicting objective functions: the annualized cash flow, the efficiency at the compression stage, and capital expenditures. The framework follows a modular approach, in which the process simulator PRO/II and a Python environment are combined. The results permit us to assess the applicability of the tested algorithms and to determine optimal operational windows based on the resultant 3-D Pareto fronts.

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Integration of LNG Regasification Process in Natural Gas-Fired Power System with Oxy-Fuel Combustion

Liu

Xiong

et al. 2020

J. Therm. Sci.

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Exergetic and economic evaluation of safety-related concepts for the regasification of LNG integrated into air separation processes

Cited by 28 publications

References 7 publications

Conventional and Advanced Exergy Analyses of an Integrated LNG Regasification–Air Separation Process

Conventional and Advanced Exergy Analyses of an Integrated LNG Regasification–Air Separation Process

Modular Framework for Simulation-Based Multi-objective Optimization of a Cryogenic Air Separation Unit

Integration of LNG Regasification Process in Natural Gas-Fired Power System with Oxy-Fuel Combustion

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