Various supercritical carbon dioxide cycle layouts study for molten carbonate fuel cell application

Bae, Seong Jun; Ahn, Yoonhan; Lee, Jekyoung; Lee, Jeong Ik

doi:10.1016/j.jpowsour.2014.07.121

Cited by 85 publications

(21 citation statements)

References 9 publications

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“…Dostal also pointed out several actual or attributed disadvantages, for example, a relatively small optimal heat sources temperature difference and the lack of other synergistic applications . Since then, the theoretical and experimental studies of supercritical CO 2 cycle have been reaching a culmination and the potential applications of sCO 2 cycles have expanded to nuclear, fossil fuel, waste heat, renewable energy sources especially CSP, fuel cells, geothermal power, etc …”

Section: Introductionmentioning

confidence: 99%

“…11 Since then, the theoretical and experimental studies of supercritical CO 2 cycle have been reaching a culmination and the potential applications of sCO 2 cycles have expanded to nuclear, fossil fuel, waste heat, renewable energy sources especially CSP, fuel cells, geothermal power, etc. 4,[12][13][14] This article first introduces four typical CSP technologies briefly, then makes a comprehensive comparison of these four typical CSP technologies and points out the challenges of CSP technologies state of art. The thermophysical properties of sCO 2 and the corresponding two real gas effects are analyzed elaborately to express the features and merits of sCO 2 power cycles over traditional steam-Rankine cycle generally adopted in CSP plants.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Review of supercritical CO₂power cycles integrated with CSP

Yin

Zheng²,

Peng

et al. 2019

Int J Energy Res

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Summary Increasing demand of electricity and severer concerns to environment call for green energy sources as well as efficient energy conversion systems. SCO2 power cycles integrated with concentrating solar power (CSP) are capable of enhancing the competitiveness of thermal solar electricity. This article makes a comprehensive review of supercritical CO2 power cycles integrated with CSP. A detailed comparison of four typical CSP technologies is conducted, and the cost challenge of currently CSP technologies is pointed out. The thermophysical properties of sCO2 and the corresponding two real gas effects are analyzed elaborately to express the features of sCO2 power cycles. An extensive review of sCO2 layouts relevant for CSP including 12 single layouts and 1 combined layout is implemented logically. Strengths and weaknesses of sCO2 power cycles over traditional steam‐Rankine cycle generally adopted in current CSP plants are concluded, followed by metal material degration summary in CSP relevant temperature sCO2 environment, which shows that the nickel‐based alloy is a proper structural material candidate for sCO2‐CSP integration. Thermodynamic analyses of sCO2 power cycles when integrated with CSP are divided into three level of which design‐point analysis and off‐design modeling are conducted and compared, more researches into the off‐design point analysis, dynamic modeling, especially the transient behavior are suggested. Economic analysis of the integrated system is concluded and presents a considerable levelized cost of electricity reduction of 15.6% to 67.7% compared to that of state of art CSP. Taking the thermodynamic and economic analysis into consideration, target designs of sCO2 power cycles for CSP are summarized in three aspects. Finally, current theoretical and experimental researches of sCO2 power cycles integrated with CSP for market penetration are introduced. The strengths, weaknesses, and potential solutions to the gaps of three potential pathways (molten salt pathway, particle pathway, and gas phase pathway) to realize the integration of sCO2 power cycles in the next CSP generation plants up to 700°C are reviewed. In general, the integration of sCO2 power cycles with CSP technologies exhibits promising expectations for facilitating the competitiveness of thermal solar electricity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Review of supercritical CO₂power cycles integrated with CSP

Yin

Zheng²,

Peng

et al. 2019

Int J Energy Res

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“…The S-CO2 cycle can be used for various heat sources including high temperature fuel cells [15]. Seong Jun Bae et al [16] conducted preliminary studies of comparing performance of various S-CO2 cycles for a power conversion system of a Molten Carbonate Fuel Cell. The S-CO2 cycle can be another attractive bottoming option for SOFC.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis of Various Combined SOFC-SCO2 Brayton Cycle System Layouts

Liu¹,

Li²,

Song³

et al. 2019

Proceedings of Global Power &Amp; Propulsion Society

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Solid oxide fuel cell (SOFC) has been considered to be a promising power generation technology due to that the hightemperature exhaust gas of SOFC can be used as another heat source for a bottoming cycle to increase the overall efficiency. This study presents a performance analysis for a combined power generation system consisting of an SOFC and a simple recuperated S-CO2 Brayton cycle. Four system layouts based on different exhaust utilization ways are analysed and compared in this study. The results indicate that the S-CO2 Brayton cycle can be a promising way for waste-heat recovery of SOFC. The system layout with six heat exchangers and two burners shows the highest output power while the system layout with seven heat exchangers and only one burner shows the highest thermal efficiency.

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“…In 1966, Feher patented the supercritical cycle heat engine and the possibility of using s-CO2 cycle for nuclear power generation was later investigated [14,15]. Recent times has witnessed a renewed interest in s-CO2 cycle [16] as PCS for nuclear power [17][18][19] and other heat sources such as concentrated solar power [20][21][22], fuel cell [23], coal [24] and waste heat [25]. In literature, s-CO2 cycle has been investigated as alternative to steam cycle for SFR application [3,[26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis and preliminary design of closed Brayton cycle using nitrogen as working fluid and coupled to small modular Sodium-cooled fast reactor (SM-SFR)

2017

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Sodium-cooled fast reactor (SFR) is considered the most promising of the Generation IV reactors for their near-term demonstration of power generation. Small modular SFRs (SM-SFRs) have less investment risk, can be deployed more quickly, are easier to operate and are more flexible in comparison to large nuclear reactor. Currently, SFRs use the proven Rankine steam cycle as the power conversion system. However, a key challenge is to prevent dangerous sodium-water reaction that could happen in SFR coupled to steam cycle. Nitrogen gas is inert and does not react with sodium. Hence, intercooled closed Brayton cycle (CBC) using nitrogen as working fluid and with a single shaft configuration has been one common power conversion system option for possible near-term demonstration of SFR. In this work, a new two shaft nitrogen CBC with parallel turbines was proposed to further simplify the design of the turbomachinery and reduce turbomachinery size without compromising the cycle efficiency. Furthermore, thermodynamic performance analysis and preliminary design of components were carried out in comparison with a reference single shaft nitrogen cycle. Mathematical models in Matlab were developed for steady state thermodynamic analysis of the cycles and for preliminary design of the heat exchangers, turbines and compressors. Studies were performed to investigate the impact of the recuperator minimum terminal temperature difference (TTD) on the overall cycle efficiency and recuperator size. The effect of turbomachinery efficiencies on the overall cycle efficiency was examined. The results showed that the cycle efficiency of the proposed configuration was comparable to the 39.44% efficiency of the reference cycle. In addition, the study indicated that the new configuration has the potential to simplify the design of turbomachinery, reduce the size of turbomachinery and provide opportunity for improving the efficiency of the turbomachinery. The findings so far revealed that the proposed two-shaft CBC with nitrogen as working fluid could be a promising power conversion system for SM-SFRs near-term demonstration. Keywords Sodium-cooled fast reactor Closed Brayton cycle Nitrogen working fluid Thermodynamic analysis Heat exchanger design Turbomachinery design Highlights  Nitrogen closed Brayton cycle for small modular sodium-cooled fast reactor studied  Thermodynamic modelling and analysis of closed Brayton cycle performed  Two-shaft configuration proposed and performance compared to single shaft  Preliminary design of heat exchangers and turbomachinery carried out

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Various supercritical carbon dioxide cycle layouts study for molten carbonate fuel cell application

Cited by 85 publications

References 9 publications

Review of supercritical CO₂power cycles integrated with CSP

Review of supercritical CO₂power cycles integrated with CSP

Thermodynamic Analysis of Various Combined SOFC-SCO2 Brayton Cycle System Layouts

Thermodynamic analysis and preliminary design of closed Brayton cycle using nitrogen as working fluid and coupled to small modular Sodium-cooled fast reactor (SM-SFR)

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Various supercritical carbon dioxide cycle layouts study for molten carbonate fuel cell application

Cited by 85 publications

References 9 publications

Review of supercritical CO2power cycles integrated with CSP

Review of supercritical CO2power cycles integrated with CSP

Thermodynamic Analysis of Various Combined SOFC-SCO2 Brayton Cycle System Layouts

Thermodynamic analysis and preliminary design of closed Brayton cycle using nitrogen as working fluid and coupled to small modular Sodium-cooled fast reactor (SM-SFR)

Contact Info

Product

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Review of supercritical CO₂power cycles integrated with CSP

Review of supercritical CO₂power cycles integrated with CSP