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

Reyes-Belmonte, Miguel A.; Sebastián, Andrés; Romero, Manuel; González-Aguilar, José

doi:10.1016/j.energy.2016.06.013

Cited by 162 publications

(40 citation statements)

References 29 publications

(43 reference statements)

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“…As the maximum temperature has already been set to 460°C, other cycle parameters should be optimized. e cycle parameters are initially set referred to existing literature [24], as shown in Table 4. e effects of compressor and turbine operation condition is first investigated to get the optimal SBC design under water-cooled condition and dry-cooled condition.…”

Section: Brayton Cycle Design For Lead Fast Reactormentioning

confidence: 99%

Supercritical CO₂ Brayton Cycle Design for Small Modular Reactor with a Thermodynamic Analysis Solver

Gao

Zhang

et al. 2020

Science and Technology of Nuclear Installations

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Coupling supercritical carbon dioxide (S-CO 2 ) Brayton cycle with Gen-IV reactor concepts could bring advantages of high compactness and efficiency. is study aims to design proper simple and recompression S-CO 2 Brayton cycles working as the indirect cooling system for a mediate-temperature lead fast reactor and quantify the Brayton cycle performance with different heat rejection temperatures (from 32°C to 55°C) to investigate its potential use in different scenarios, like arid desert areas or areas with abundant water supply. High-efficiency S-CO 2 Brayton cycle could offset the power conversion efficiency decrease caused by low core outlet temperature (which is 480°C in this study) and high compressor inlet temperature (which varies from 32°C to 55°C in this study). A thermodynamic analysis solver is developed to provide the analysis tool. e solver includes turbomachinery models for compressor and turbine and heat exchanger models for recuperator and precooler. e optimal design of simple Brayton cycle and recompression Brayton cycle for the lead fast reactor under water-cooled and dry-cooled conditions are carried out with consideration of recuperator temperature difference constraints and cycle efficiency. Optimal cycle efficiencies of 40.48% and 35.9% can be achieved for the recompression Brayton cycle and simple Brayton cycle under water-cooled condition. Optimal cycle efficiencies of 34.36% and 32.6% can be achieved for the recompression Brayton cycle and simple Brayton cycle under dry-cooled condition (compressor inlet temperature equals to 55°C). Increasing the dry cooling flow rate will be helpful to decrease the compressor inlet temperature. Every 5°C decrease in the compressor inlet temperature will bring 1.2% cycle efficiency increase for the recompression Brayton cycle and 0.7% cycle efficiency increase for the simple Brayton cycle. Helpful conclusions and advises are proposed for designing the Brayton cycle for mediate-temperature nuclear applications in this paper.

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Section: Brayton Cycle Design For Lead Fast Reactormentioning

confidence: 99%

Supercritical CO₂ Brayton Cycle Design for Small Modular Reactor with a Thermodynamic Analysis Solver

Gao

Zhang

et al. 2020

Science and Technology of Nuclear Installations

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“…Renewable energy utilization is one of the favorable solutions to the conflict between increasing power demand and environmental issues caused by the consumption of fossil fuels. Among all renewable energy sources, concentrated solar power (CSP) is gaining increasing interest worldwide, because of its inherent advantages such as large amounts of energy storage capacity and the possibility of rising economic competitiveness with fossil fuels . CSP technologies generate electricity by concentrating the solar radiation beam onto a small area, where a heat transfer fluid is heated up and ultimately transformed into steam.…”

Section: Introductionmentioning

confidence: 99%

Parametric study on the thermoelectric conversion performance of a concentrated solar-driven thermionic-thermoelectric hybrid generator

Xiao

Yang

2017

Int J Energy Res

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Summary A concentrated solar‐driven thermionic‐thermoelectric hybrid generator composed of solar heat collector, thermionic generator (TIG), thermoelectric generator (TEG), and radiator is introduced in this paper. A theoretical model of thermoelectric conversion performance for the hybrid generator is built up based on the heat source of the concentrated solar radiation rather than isothermal heat source. Based on the model, the impacts of related parameters on the internal temperature distributions, output power, and efficiency have been discussed. Moreover, the optimal operating conditions of the TIG‐TEG hybrid device at its maximum output power and efficiency have been determined. Results show that when cascading the TEG with the TIG, there is very little change of the TIG cathode temperature in most conditions, namely, TC ≈ TC′. Meanwhile, the anode temperature becomes higher, and the TEG cold end temperature T2 is close to the anode temperature TA′ for the single TIG system, ie, TA > TA′ ≈ T2. In theory, the optimal concentrated solar radiation I0 for the maximum output power Pmax and the maximum efficiency ηmax differs, which are I0,P = 2.5 × 106 W/m2 and I0,η = 2 × 106 W/m2, respectively, whereas the output power and efficiency of the TIG‐TEG hybrid system simultaneously reach their maximum values when the optimal TIG anode temperature TA,opt = 1025 K, the optimal TIG output voltage Vopt = 2 V, and the optimal ratio of load resistance to internal resistance (R2/R)opt = 2. However, in practice, the parameter values of I0, ΦA, and TA should be strictly controlled under 1.8 × 106 W/m2, 1.4 eV, and 660 K, respectively. Generally, the maximum output power and efficiency of the hybrid TIG‐TEG system are, respectively, 35% and 4% higher than that of the single TIG.

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“…n−1 (6) where r ins is the insurance rate. Coal is the only fuel used by a STCG plant, and the annual coal consumption depends on grid demand and annual DNI.…”

Section: (2) Operation and Maintenance Costmentioning

confidence: 99%

“…Solar thermal power plants with an energy storage system of sufficient capacity can generate electricity in a stable manner under variable direct normal irradiance (DNI). Therefore, solar thermal power generation is seen as one of the most promising technologies for non-fossil energy power generation [4][5][6]. At present, China's solar thermal power generation industry is still in its early stages, while the development of related industries is not yet mature.…”

Section: Introductionmentioning

confidence: 99%

Techno-Economic Analysis of Solar Tower Aided Coal-Fired Power Generation System

et al. 2017

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Abstract:In this paper, we conduct a techno-economic analysis of a 1000 MWe solar tower aided coal-fired power generation system for the whole life cycle. Firstly, the power output (from coal and solar thermal energy) under variable direct normal irradiance and grid demand are studied. Secondly, a financial assessment is performed, including profits and losses of the plant project. Thirdly, sensitivity analysis is taken on some external factors that can affect the cost or profits and losses of the plant project. The results indicate that the project has high profits with an internal rate of return (IRR) of 8.7%. In addition, the effects of solar tower field cost, power purchase agreement (PPA) price of solar thermal electricity, coal price, and the interest rate of debt on the main criteria decrease gradually. Therefore, it is better to improve solar tower technology first, and then look for low-interest debts from banks to cope with the reduction of PPA price of solar thermal electricity and the increase of coal price. Despite the introduction of solar tower field increasing levelized cost of electricity (LCOE), it contributes to the reduction of CO 2 capture cost compared to the case of standard coal-fired power plants.

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

Cited by 162 publications

References 29 publications

Supercritical CO₂ Brayton Cycle Design for Small Modular Reactor with a Thermodynamic Analysis Solver

Supercritical CO₂ Brayton Cycle Design for Small Modular Reactor with a Thermodynamic Analysis Solver

Parametric study on the thermoelectric conversion performance of a concentrated solar-driven thermionic-thermoelectric hybrid generator

Techno-Economic Analysis of Solar Tower Aided Coal-Fired Power Generation System

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

Cited by 162 publications

References 29 publications

Supercritical CO2 Brayton Cycle Design for Small Modular Reactor with a Thermodynamic Analysis Solver

Supercritical CO2 Brayton Cycle Design for Small Modular Reactor with a Thermodynamic Analysis Solver

Parametric study on the thermoelectric conversion performance of a concentrated solar-driven thermionic-thermoelectric hybrid generator

Techno-Economic Analysis of Solar Tower Aided Coal-Fired Power Generation System

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Product

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Supercritical CO₂ Brayton Cycle Design for Small Modular Reactor with a Thermodynamic Analysis Solver

Supercritical CO₂ Brayton Cycle Design for Small Modular Reactor with a Thermodynamic Analysis Solver