Dynamic analysis of concentrated solar supercritical CO2-based power generation closed-loop cycle

Osorio, Julián D.; Hovsapian, Rob; Ordóñez, Juan C.

doi:10.1016/j.applthermaleng.2015.10.039

Cited by 97 publications

(32 citation statements)

References 32 publications

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“…J.D. Osorio performed a similar analysis but with dynamic models of receivers and the storage and on‐design assumptions of heat exchangers, compressors and turbines …”

Section: Sco2 Power Cycles Integrated With Cspmentioning

confidence: 99%

“…37 SCO 2 cycles incorporated into CSP present a better performance with regard to water/steam under partially cloudy sky or cloudy sky days for the reason that it remain a single phase and work at low temperatures. 69 The intermittency nature of solar energy is happen to deviate the power block from the design point. A better off-design power production from sCO 2 power cycles has been reported, symbolizing a greater overall performance evaluated on an annual base.…”

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

confidence: 99%

“…Osorio performed a similar analysis but with dynamic models of receivers and the storage and on-design assumptions of heat exchangers, compressors and turbines. 69 As can be read from Table 5, the dynamic model of sCO 2 power cycle integrated with CSP which takes the dynamic models of solar receiver, turbine, compressor and heat exchangers at varied solar heat input and ambient temperature have not been researched. Moreover, previous studies mainly focuses on direct cycles.…”

Section: Off-design Analysis and Dynamic Modelingmentioning

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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“…J.D. Osorio performed a similar analysis but with dynamic models of receivers and the storage and on‐design assumptions of heat exchangers, compressors and turbines …”

Section: Sco2 Power Cycles Integrated With Cspmentioning

confidence: 99%

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

confidence: 99%

Section: Off-design Analysis and Dynamic Modelingmentioning

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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“…With the restriction of pressure and temperature, it is able to be limited in the supercritical region, thus validly simulating the property of SCO 2 in the designed compressor [34]. The explicit state equation is shown below in Equation (8).…”

Section: Governing Equationsmentioning

confidence: 99%

“…The research on SCO 2 has gradually been increasing lately. In recent years, the investigations on SCO 2 Brayton cycle or SCO 2 -based solar Rankine cycle system have been covered [6][7][8]. SCO 2 cycle has been considered as the most promising and attractive candidate in concentrated solar power, coal power system, or bottoming cycle of fuel cells due to its abovementioned advantages [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Unsteady Flow Characteristics of a SCO2 Centrifugal Compressor

et al. 2017

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Supercritical carbon dioxide (SCO 2 ) is a vital working fluid in the application of power units and its high density helps to achieve a compact mechanical structure. Centrifugal compressors are of vital use in various kinds of equipment. In this paper, a SCO 2 centrifugal compressor of large input power and mass flow rate is designed and numerically investigated. A thorough numerical analysis of the unsteady flow field in the centrifugal compressor is performed in ANSYS-CFX. The computation adopts hexahedral mesh, finite volume method, and the RNG k-ε two-equation turbulence model. Streamlines, temperature, pressure, and Mach number distributions at different time steps in one revolution period are covered to present the unsteady effect of turbomachinery. Meanwhile, the force on a single rotor blade is monitored to investigate the frequency components of exciting force, thus providing the foundation for vibration analysis. Moreover, the torque, output power, pressure ratio, and isentropic efficiency in the steady and the unsteady time-averaged condition are calculated and compared with the design condition to measure the validity of the design. In summary, the unsteady computation result reveals that the unsteady flow characteristics are prominent in the designed compressor and the design of impeller and diffuser meet the requirement.

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Dynamic characteristics of a shell and plate particle‐SCO ₂ moving packed bed heat exchanger with various SCO ₂ channel configurations

Yin

Zheng

Zhang

2020

Intl J of Energy Research

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This article proposes a dynamic analysis framework for a shell and plate particle-SCO 2 moving packed bed heat exchanger (MPBE) with straight SCO 2 channel and four fins-modified SCO 2 channels, which contains a static model and a dynamic model. 13 cases covering an initial temperature deviation range of +50 ~−100 K from design-point case in solids inlet, an initial temperature deviation range of +50 ~−100 K from design-point case in SCO 2 inlet, and a SCO 2 inlet velocity range of 1.5 times to 0.05 times are introduced to measure the dynamic characteristics. Dynamic responses of five MPBE configurations to two types of inputs (step-change perturbations and linear-change perturbations) under 13 cases are analyzed. Relaxation times at each case are summarized and compared. A low threshold temperature exists for all five MPBE configurations to avoid oscillations in solids outlet temperature under stepchange perturbations in solids inlet temperature, and a low threshold SCO 2 inlet temperature just appears in MPBE with straight SCO 2 channels under step-change perturbations in SCO 2 inlet temperature. Improved MPBE configurations show apparent less relaxation time than MPBE with straight SCO 2 channel. Among four fins-modified MPBE configurations, MPBE channels modified with offset rectangular fins on SCO 2 side exert the fastest dynamic characteristic in most cases. K E Y W O R D S CSP Gen3, dynamic characteristics, dynamic heat transfer model, particle-SCO 2 moving packed bed heat exchanger | INTRODUCTIONAiming at expediting solar thermal electricity capacity and enhancing solar thermal generation cost competitiveness, research studies concerning the implement of the next generation of concentrated solar power plant (CSP Gen 3) have been gaining colossal vigor recently. [1][2][3] Compared with the first and second CSP plants of which the annual solar-electric efficiency is generally less than 20%, CSP Gen 3 entails the potential to achieve an annual solar-electric efficiency of 25%~30%. 4 The considerable improvement can be ascribed to the elevated peak operating temperature, expecting to be >700 C. Two main technologies matching peak operating temperature Abbreviations: CSP, concentrated solar power plants; MPBE, moving packed bed heat exchanger; SCO 2 , supercritical carbon dioxide; TES, thermal energy storage; PCHE, printed circuit heat exchanger.

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Dynamic analysis of concentrated solar supercritical CO2-based power generation closed-loop cycle

Cited by 97 publications

References 32 publications

Review of supercritical CO₂power cycles integrated with CSP

Review of supercritical CO₂power cycles integrated with CSP

Investigation on Unsteady Flow Characteristics of a SCO2 Centrifugal Compressor

Dynamic characteristics of a shell and plate particle‐SCO ₂ moving packed bed heat exchanger with various SCO ₂ channel configurations

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Dynamic analysis of concentrated solar supercritical CO2-based power generation closed-loop cycle

Cited by 97 publications

References 32 publications

Review of supercritical CO2power cycles integrated with CSP

Review of supercritical CO2power cycles integrated with CSP

Investigation on Unsteady Flow Characteristics of a SCO2 Centrifugal Compressor

Dynamic characteristics of a shell and plate particle‐SCO 2 moving packed bed heat exchanger with various SCO 2 channel configurations

Contact Info

Product

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Review of supercritical CO₂power cycles integrated with CSP

Review of supercritical CO₂power cycles integrated with CSP

Dynamic characteristics of a shell and plate particle‐SCO ₂ moving packed bed heat exchanger with various SCO ₂ channel configurations