Thermodynamic evaluation of three mini-scale nitrogen single expansion processes for liquefaction of natural gas using advanced exergy analysis

Palizdar, Ali; Ramezani, Talieh; Nargessi, Zahra; AmirAfshar, Saeedeh; Abbasi, Mojgan; Vatani, Ali

doi:10.1016/j.enconman.2017.08.042

Cited by 28 publications

(5 citation statements)

References 24 publications

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“…Exogenous exergy destruction ( E d,k EX ) is obtained by the difference between the total exergy destruction and the endogenous exergy destruction. By integrating avoidable/unavoidable exergy destruction analysis with endogenous/exogenous exergy destruction analysis, we can calculate the following: Avoidable endogenous exergy destruction ( E d,k AV,EN ), that is, the exergy destruction that can be reduced by improving the efficiency of the under-consideration component, and Avoidable exogenous exergy destruction ( E d,k AV,EX ), that is, the exergy destruction that can be reduced by improving the overall process design. ,,− …”

Section: Model Developmentmentioning

confidence: 99%

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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: Model Developmentmentioning

confidence: 99%

“…Avoidable exogenous exergy destruction ( E d,k AV,EX ), that is, the exergy destruction that can be reduced by improving the overall process design. ,,− …”

Section: Model Developmentmentioning

confidence: 99%

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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“…Based on the CEA, AEA [32] is proposed to provide the thermodynamic interactions among the equipments and evaluating the real improving potentials of each equipment.…”

Section: Advanced Exergy Analysismentioning

confidence: 99%

Advanced exergy analysis of organic Rankine Cycles for Fischer-Tropsch syngas production with parallel dry and steam methane reforming

Yan

Yang

Chien

et al. 2019

Energy Conversion and Management

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“…They found that the proportion of endogenous exergy destruction in the components was higher than that of exogenous exergy destruction [18]. Palizdar [19] calculated the total avoidable (EXERRGY) damage and total (EXER-RGY) efficiency by using the improved EXERRGY analysis mathematical model, so as to preset the components in the process of improvement and simplification. At the same time, the chemical exergy calculated by the model is more accurate [19].…”

Section: Introductionmentioning

confidence: 99%

“…Palizdar [19] calculated the total avoidable (EXERRGY) damage and total (EXER-RGY) efficiency by using the improved EXERRGY analysis mathematical model, so as to preset the components in the process of improvement and simplification. At the same time, the chemical exergy calculated by the model is more accurate [19]. In 2019, Palizdar A introduced the concept of economic analysis based on exergy efficiency analysis, succeeded in the practical application of small N 2 double expander process and put forward a multiobjective economic cost analysis method for small liquefaction equipment [20].…”

Section: Introductionmentioning

confidence: 99%

Operation analysis of C3-MR process cold box by grey system theory

Yang

Xiao

Jia³

2021

SN Appl. Sci.

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In this paper, the problems of high refrigerant line differential pressure and uneven distribution of cold energy in cold box regulation under C3-MR process are studied. Five reasons are predicted by engineering performance. Using gas chromatography experiment and grey system pure mathematics analysis, it is determined that the main causes of the problem are unreasonable distribution ratio of each group of mixed refrigerants and disordered latent heat of vaporization of refrigerants. Furthermore, the grey system model is used to study: 1. grey relation analysis model shows that the correlation degree of T3 temperature measuring point is 0.8552, which is the only main factor. The abnormal working condition is determined by the project to be caused by incorrect proportion of N2 components. 2. According to GM(1,N) model, the driving term of T3 temperature measuring point is 3.8304, which needs to be supplemented with N2 component to eliminate the problem. 3. After adding N2 to 10% (mol component), abnormal working conditions disappeared. The GM(1,N) model is used again to verify that the difference of driving results is small, the average relative error is 24.91%, and the accuracy of the model is in compliance.

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Thermodynamic evaluation of three mini-scale nitrogen single expansion processes for liquefaction of natural gas using advanced exergy analysis

Cited by 28 publications

References 24 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

Advanced exergy analysis of organic Rankine Cycles for Fischer-Tropsch syngas production with parallel dry and steam methane reforming

Operation analysis of C3-MR process cold box by grey system theory

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