Investigation and Performance Improvement of the Propane Precooling Cycle in the Propane Precooled Mixed Refrigerant Cycle Liquefaction Process

Fahmy, M.F.M.; Nabih, H. I.; El-Aziz, M. R. Abd

doi:10.1021/acs.iecr.5b04249

Cited by 16 publications

(5 citation statements)

References 49 publications

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“…Because the C3/MRC combines the advantages of MRC and cascade refrigeration cycle, it is currently the most dynamic liquefaction process in the world. Both the APCI and Shell of the United States have their own patents in this process [27,28].…”

Section: Propane Mixed-refrigerant Cycle (C3/mrc)mentioning

confidence: 99%

A Critical Analysis of Natural Gas Liquefaction Technology

Wu¹,

Wang²,

Dong³

et al. 2022

Fluid Dynamics &Amp; Materials Processing

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Section: Propane Mixed-refrigerant Cycle (C3/mrc)mentioning

confidence: 99%

A Critical Analysis of Natural Gas Liquefaction Technology

Wu¹,

Wang²,

Dong³

et al. 2022

Fluid Dynamics &Amp; Materials Processing

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“…SMR CYCLE CONFIGURATIONS This section considers the liquefaction of a natural gas stream for the production of LNG at a small scale (1 MTPA). The natural gas stream is adapted from the work of Fahmy et al, 32 and the details are given in Table S1 in the Supporting Information.…”

Section: Case Study I: Thorough Optimization Of Thementioning

confidence: 99%

Structural Modifications on Single Mixed Refrigerant Cycles for Performance Improvements in Small-Scale LNG Processes

Almeida‐Trasvina

Smith

2022

Ind. Eng. Chem. Res.

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Production of liquefied natural gas (LNG) at a small scale typically relies on single mixed refrigerant (SMR) cycles to provide the necessary refrigeration. The shaft power required for refrigerant compression is by far the largest contributor to the operating costs of the entire LNG plant. The highly nonlinear interactions between operating variables mean that the optimization of these SMR cycles is very challenging. Current design methodologies for SMR cycles mostly rely on stochastic search algorithms to search the solution space. However, the quality of the results obtained from these methodologies is difficult to assess. Exergy analysis can be performed, but it provides limited information. This work provides a thermodynamic-based analysis to minimize the shaft power demand. Four different SMR cycle configurations are studied in one case study. The analysis brings insights regarding their optimized conditions, including the refrigerant composition. These insights are demonstrated to be useful with a second case study, which is used to develop effective design methodologies for SMR cycles. Overall, the analysis of structural modifications to SMR cycles in this work enables a more fundamental understanding of their optimal design for high energy efficiency.

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“…In this case study, the natural gas stream data are presented in Table , based on the work of Fahmy et al and LNG production is assumed to be 1 MTPA. The three SMR configurations are to be optimized to minimize the shaft work required to cool and liquefy the natural gas stream from 25 °C (298.15 K) to its target temperature of −161.0 °C (112.15 K).…”

Section: Case Study: Problem Definition and Optimization Strategymentioning

confidence: 99%

“…In this case study, the natural gas stream data are presented in Table 8, based on the work of Fahmy et al 45 and LNG production is assumed to be 1 MTPA. The three SMR Cooling and liquefaction of the natural gas stream is assumed at a constant pressure of 63 bar.…”

Section: Case Study: Problem Definition Andmentioning

confidence: 99%

Development of an Energy-Efficient Single Mixed Refrigerant Cycle for Small-Scale LNG Production

Trasviña

Smith

Jobson

2021

Ind. Eng. Chem. Res.

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Energy-intensive single mixed refrigerant (SMR) cycles are employed to produce liquefied natural gas (LNG) at small scale. The energy required for refrigerant compression (shaft work) dominates the overall operating costs of the LNG plant. While current methods to minimize shaft work demand (e.g., exergy analysis) focus on the PRICO cycle, this paper shows that structurally modifying the configuration of SMR cycles can yield significant savings in shaft work demand with low added complexity. The novel SMR cycle developed in this work is based on the CryoMan SMR cycle; its benefits, in terms of energy savings, are demonstrated through a case study for natural gas liquefaction at small scale. The shaft work demand of the PRICO, CryoMan, and novel SMR cycles are minimized using a genetic algorithm and nonlinear optimization. The structural modifications applied tailor the refrigerant composition and exploit complex trade-offs between the operating variables to enhance the energy efficiency of the SMR cycles. The results from the case study demonstrate that the novel SMR cycle achieves 10% savings in shaft work demand in comparison with the PRICO SMR cycle.

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Investigation and Performance Improvement of the Propane Precooling Cycle in the Propane Precooled Mixed Refrigerant Cycle Liquefaction Process

Cited by 16 publications

References 49 publications

A Critical Analysis of Natural Gas Liquefaction Technology

A Critical Analysis of Natural Gas Liquefaction Technology

Structural Modifications on Single Mixed Refrigerant Cycles for Performance Improvements in Small-Scale LNG Processes

Development of an Energy-Efficient Single Mixed Refrigerant Cycle for Small-Scale LNG Production

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