Power plant based on three series Rankine cycles combined with a direct expander using LNG cold as heat sink

García, Ramón Ferreiro; Carril, José Carbia; Gómez, Javier; Gómez, Manuel Romero

doi:10.1016/j.enconman.2015.05.051

Cited by 76 publications

(11 citation statements)

References 23 publications

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“…In the simulation process, the input parameters are shown in Table . The mole fractions of LNGare 91.33% for CH 4 , 5.36% for C 2 H 6 , 2.14% for C 3 H 8 , 0.47% for i-C 4 H 10 , 0.46% for n-C 4 H 10 , 0.01% for i-C 5 H 12 , 0.01% for n-C 5 H 12 , and 0.22% for N 2 . It is necessary to emphasize that the terminal pressure of NG is also different in different applications.…”

Section: System Modeling and Simulationmentioning

confidence: 99%

Energy and Economic Optimization of the Multistage Condensation Rankine Cycle That Utilizes LNG Cold Energy: Considerations on Working Fluids and Cycle Configurations

Yuan

Song

Zhang

et al. 2019

ACS Sustainable Chem. Eng.

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To improve the performance of LNG cold energy power generation systems, scholars have made great efforts to enhance the cycle configuration and select the suitable working fluid. In this process, the improvement of the configuration and the selection of the working fluid are mostly independent, so that the possibility of missing the optimal combination is great. To solve the problem, the superstructures of the two-stage condensation Rankine cycle (2C-ORC) and the three-stage condensation Rankine cycle (3C-ORC) are established in this work, which contain different compression and expansion layouts. The selection coefficients of the working fluids are also introduced at the same time, which can optimize the compositions of mixed working fluids. In this way, the system configuration improvement and working fluid selection can be realized simultaneously. In this work, the net power output and the total cost are taken as the objective functions for the single-objective optimization, respectively. The optimal cycle configurations and mixed working fluids respectively corresponding to the maximum net power output and the minimum total investment cost are determined under different LNG regasification pressures. Then multiobjective optimization is carried out to determine the optimal design parameters under different LNG regasification pressures. The results show that when the LNG gasification pressure is 70 bar, 30 bar, 25 bar, and 6 bar, the maximum net power output of 3C-ORC is 6.21%, 3.24%, 2.25%, and 2.86% higher than that of 2C-ORC, respectively, and the minimum cost of 2C-ORC is 33.60%, 32.13%, 27.70%, and 27.93% lower than that of 3C-ORC, respectively. Finally, after the comprehensive consideration for the economy and generating capacity, at any gasification pressure of LNG, 2C-ORC of a binary mixture with C2H4 or C2H6 as the main component is recommended.

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Section: System Modeling and Simulationmentioning

confidence: 99%

Energy and Economic Optimization of the Multistage Condensation Rankine Cycle That Utilizes LNG Cold Energy: Considerations on Working Fluids and Cycle Configurations

Yuan

Song

Zhang

et al. 2019

ACS Sustainable Chem. Eng.

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“…The effects of different variables, such as the turbine inlet temperature, compressor inlet temperature, compression ratio, and LNG pressure, were analyzed. Garcia et al 97 used RCs in series as a heat sink to recover the LNG cold energy. They proposed a design for a power generation process using a sequence of argon RC, methane RC, direct LNG expansion, and methane (or R14) RC.…”

Section: Lng Cold Energy Recovery Issues In Regasificationmentioning

confidence: 99%

Key Issues and Challenges on the Liquefied Natural Gas Value Chain: A Review from the Process Systems Engineering Point of View

Lee

Park

Moon

2017

Ind. Eng. Chem. Res.

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This paper reviews recent contributions on the liquefied natural gas (LNG) value chain in the field of process systems engineering (PSE). While previous review articles deal with specific topics for each issue on the LNG value chain, this paper deals with the key issues and challenges on the LNG value chain from the process systems engineering point of view. The major challenges for the LNG value chain are (a) multiscale and integrated modeling between the liquefaction process and the utility systems, (b) process and size selection for the natural gas liquefaction, (c) utilization of LNG fuel, (d) using generated boil-off gas as the raw material for other industries, and (e) commercializing LNG cold recovery to industrial sites. Identifying key issues and presenting challenges on the LNG value chain will contribute to the advancement of the PSE field and the LNG industry.

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“…Improvement of system structure and proper working fluid selection are two effective way to enhance the system performance. For system structure, the combinations of simple Rankine cycle in series or parallel is often considered by Zhang et al [7] and García et al [15] and they found that they were indeed more efficient. Cascaded Rankine cycles are also common improvement and are proved to be superior to simple Rankine cycles by Li et al [16], Choi et al [17], Cao et al [18], and Wang et al [19].…”

Section: Introductionmentioning

confidence: 99%

Organic Rankine Cycle for Recovery of Liquefied Natural Gas (LNG) Cold Energy

Bao¹

2018

Organic Rankine Cycle Technology for Heat Recovery

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Natural gas (NG) is an environment-friendly energy source. NG is of gas state in the environmental condition and it is liquefied to LNG at temperature of about −162°C for transportation and storage. Electric energy of 292-958 kWh is consumed when one ton of LNG is produced. Before being used, LNG must be regasified to NG again at the receiving site, and this process will release a great deal of energy, which is called cold energy. It's very important to recovery LNG cold energy, which is clean and of high quality.Power generation is a conventional and effective way to utilize LNG cold energy. For the low efficiency of the traditional power generation system with liquefied natural gas (LNG) cold energy utilization, by improving the heat transfer characteristic between the working fluid and LNG, this chapter has proposed a conception of multi-stage condensation Rankine cycle system. Furthermore, the performance of power generation systems will be enhanced with two aspects: improvement of system configuration and optimization of working fluids.

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Power plant based on three series Rankine cycles combined with a direct expander using LNG cold as heat sink

Cited by 76 publications

References 23 publications

Energy and Economic Optimization of the Multistage Condensation Rankine Cycle That Utilizes LNG Cold Energy: Considerations on Working Fluids and Cycle Configurations

Energy and Economic Optimization of the Multistage Condensation Rankine Cycle That Utilizes LNG Cold Energy: Considerations on Working Fluids and Cycle Configurations

Key Issues and Challenges on the Liquefied Natural Gas Value Chain: A Review from the Process Systems Engineering Point of View

Organic Rankine Cycle for Recovery of Liquefied Natural Gas (LNG) Cold Energy

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