Performance study of solar power plants with CO2 as working fluid. A promising design window

Muñoz-Antón, Javier; Rubbia, C.; Rovira, Antonio; Martínez-Val, José M.

doi:10.1016/j.enconman.2014.12.030

Cited by 46 publications

(19 citation statements)

References 35 publications

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“…Steam Rankine cycles suffer a thermal inertial due to the phase change that complicates the start‐ups . While single phase around the sCO 2 cycle brings transients convenience.…”

Section: Power Cycles Based On Sco2mentioning

confidence: 99%

“…6 Steam Rankine cycles suffer a thermal inertial due to the phase change that complicates the start-ups. 67 While single phase around the sCO 2 cycle brings transients convenience. A sCO 2 power cycle capacity range of 10-150 MW offers options covering from small modular to large CSP system designs.…”

Section: Strengths and Weaknesses Of Sco 2 Power Cycles Over Traditmentioning

confidence: 99%

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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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“…Steam Rankine cycles suffer a thermal inertial due to the phase change that complicates the start‐ups . While single phase around the sCO 2 cycle brings transients convenience.…”

Section: Power Cycles Based On Sco2mentioning

confidence: 99%

Section: Strengths and Weaknesses Of Sco 2 Power Cycles Over Traditmentioning

confidence: 99%

Review of supercritical CO₂power cycles integrated with CSP

Yin

Zheng²,

Peng

et al. 2019

Int J Energy Res

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“…Ystad et al [23] proposed a transcritical CO 2 cycle utilizing heat sources associated with the CO 2 capture process and CO 2 compression process. A regenerative closed to critical CO 2 Brayton cycle integrated with multi-tube solar receiver was analysed by Muñoz-Ant on et al [24]. Akbari et al [25] found that exergy efficiency could be improved with lower product unit cost by utilizing waste heat from a supercritical CO 2 recompression Brayton cycle in an organic Rankine cycle.…”

Section: Introductionmentioning

confidence: 99%

Transcritical CO2 power cycle – Effects of regenerative heating using turbine bleed gas at intermediate pressure

Mondal

2015

Energy

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“…Supercritical Carbon Dioxide (sCO2) operating in closed Brayton power cycles offers the potential of higher cycle efficiency versus conventional working mediums (i.e. helium and superheated or supercritical steam) at temperature relevant for Concentrating Solar Thermal (CST) applications [7,65]. Compared to steam, sCO2 power cycles also have wider scalability, higher power density, and more compact and less complex power blocks.…”

Section: Introductionmentioning

confidence: 99%

“…This is understandable because, in the past few decades, the main applications of sCO2 heat transfer use were in air-conditioning and refrigeration systems, and rocket combustion wall cooling, with small diameter tubing. For the proposed sCO2 Brayton cycles in CST applications [65,178,179], the cooling system, that works near the critical point, is a crucial component. Preliminary research [50] demonstrated that in this application, higher cycle efficiencies and more compact cooling tower designs could be achieved using direct air-cooling compared to indirect cooling that would involve a separate cooling water loop.…”

Section: Introductionmentioning

confidence: 99%

Computational investigations on heat transfer of turbulent supercritical CO2 in large tubes using RANS modelling

Wang¹

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Owing to the potential to offer higher cycle efficiency, supercritical carbon dioxide (sCO2) is considered as the promising alternative to replace conventional working fluids, such as steam, for the next-generation power cycles embedded in Concentrating Solar Thermal (CST) applications. Gaining in-depth understandings on flow and heat transfer characteristics of turbulent sCO2 near critical point Publications included in this thesisWith permission by the University of Queensland Policy 4.60.07 (Alternate Thesis Format Options), scholarly works during candidature are included and form the main parts of this thesis. The contexts of four chapters (Chapter 3, 4, 5 and 6) have been published in peer reviewed journals and the review work (Chapter 2) has been submitted to a peer-review journal. Clear statements of authorship and contribution are provided as follows.

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Performance study of solar power plants with CO2 as working fluid. A promising design window

Cited by 46 publications

References 35 publications

Review of supercritical CO₂power cycles integrated with CSP

Review of supercritical CO₂power cycles integrated with CSP

Transcritical CO2 power cycle – Effects of regenerative heating using turbine bleed gas at intermediate pressure

Computational investigations on heat transfer of turbulent supercritical CO2 in large tubes using RANS modelling

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Performance study of solar power plants with CO2 as working fluid. A promising design window

Cited by 46 publications

References 35 publications

Review of supercritical CO2power cycles integrated with CSP

Review of supercritical CO2power cycles integrated with CSP

Transcritical CO2 power cycle – Effects of regenerative heating using turbine bleed gas at intermediate pressure

Computational investigations on heat transfer of turbulent supercritical CO2 in large tubes using RANS modelling

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Review of supercritical CO₂power cycles integrated with CSP

Review of supercritical CO₂power cycles integrated with CSP