Design consideration of supercritical CO2 power cycle integral experiment loop

Ahn, Yoonhan; Lee, Jekyoung; Kim, Seong Gu; Lee, Jeong Ik; Eun, Jae; Lee, Si-Woo

doi:10.1016/j.energy.2015.03.066

Cited by 97 publications

(26 citation statements)

References 22 publications

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“…Information from Table 3 is proposing a comparison of different key parameters such as pressure and temperature, recuperator effectiveness, turbomachinery efficiency, pressure drops and recompression fraction. This data differs substantially from experimental tests carried out as can be checked in recent literature [6,9,26], showing the big leap required to achieve expected results.…”

Section: Boundary Conditions and Design Criteriacontrasting

confidence: 61%

“…DPS CSP plant flexibility also facilitates the implementation of new thermodynamic cycles and/or novel heat transfer fluids in the power block, as for example Helium or supercritical carbon dioxide (sCO 2 ) [5]. In this paper, a power cycle using sCO 2 for CSP application has been considered due to its attractive thermodynamic properties allowing very high efficiency and high compactness for moderate turbine inlet temperature [6,7]. These properties, coupled to the free-water (and/or wet cooling) cycle configuration has attracted the attention of many researcher from solar field [7e10].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimization of a recompression supercritical carbon dioxide cycle for an innovative central receiver solar power plant

Reyes-Belmonte

Sebastián

Romero

et al. 2016

Energy

158

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Section: Boundary Conditions and Design Criteriacontrasting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Optimization of a recompression supercritical carbon dioxide cycle for an innovative central receiver solar power plant

Reyes-Belmonte

Sebastián

Romero

et al. 2016

Energy

158

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“…There are many supporting studies about the SCO 2 Brayton cycle for nuclear applications [7][8][9]. Several research institutes around the world have already achieved electricity generation with experimental SCO 2 power conversion systems and they are trying to improve the system performances [10][11][12][13]. It is interesting to note that both fossil and renewable industries are actively developing the SCO 2 Brayton cycle in pursuit of a high-performance power conversion system.…”

Section: Introductionmentioning

confidence: 99%

A Conceptual Study of a Supercritical CO2-Cooled Micro Modular Reactor

Hartanto

Moon

et al. 2015

Energies

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A neutronics conceptual study of a supercritical CO 2 -cooled micro modular reactor (MMR) has been performed in this work. The suggested MMR is an extremely compact and truck-transportable nuclear reactor. The thermal power of the MMR is 36.2 MWth and it is designed to have a 20-year lifetime without refueling. A salient feature of the MMR is that all the components including the generator are integrated in a small reactor vessel. For a minimal volume and long lifetime of the MMR core, a fast neutron spectrum is utilized in this work. To enhance neutron economy and maximize the fuel volume fraction in the core, a high-density uranium mono-nitride U 15 N fuel is used in the fast-spectrum MMR. Unlike the conventional supercritical CO 2 -cooled fast reactors, a replaceable fixed absorber (RFA) is introduced in a unique way to minimize the excess reactivity and the power peaking factor of the core. For a compact core design, the drum-type control absorber is adopted as the primary reactivity control mechanism. In this study, the neutronics analyses and depletions have been performed by using the continuous energy Monte Carlo Serpent code with the evaluated nuclear data file ENDF/B-VII.1 Library. The MMR core is characterized in view of several important safety parameters such as control system worth, fuel temperature coefficient (FTC) and coolant void reactivity (CVR), etc. In addition, a preliminary thermal-hydraulic analysis has also been performed for the hottest channel of the Korea Advanced Institute of Science and Technology (KAIST) MMR.

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“…Nevertheless, one potential disadvantage of SCO 2 lies in the phase change near the critical point, which can lead to the instability of actual operation. In this paper, the state parameters of inlet are above the critical point of CO 2 and the geometry of impeller and diffuser is well designed to avoid the subcritical state of the working fluid as much as possible [27].…”

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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Design consideration of supercritical CO2 power cycle integral experiment loop

Cited by 97 publications

References 22 publications

Optimization of a recompression supercritical carbon dioxide cycle for an innovative central receiver solar power plant

Optimization of a recompression supercritical carbon dioxide cycle for an innovative central receiver solar power plant

A Conceptual Study of a Supercritical CO2-Cooled Micro Modular Reactor

Investigation on Unsteady Flow Characteristics of a SCO2 Centrifugal Compressor

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