Optimization of a solar aided coal-fired combined heat and power plant based on changeable integrate mode under different solar irradiance

Zhong, Weimin; Chen, Xiaobo; Zhou, Yi; Wu, Yanling; López, Cristian

doi:10.1016/j.solener.2017.04.049

Cited by 35 publications

(6 citation statements)

References 24 publications

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“…In this regard, solar energy is considered to be a promising energy in the near future [ 3 , 4 , 5 , 6 ]. Solar energy could also provide 11.3% of global electricity by 2050 according to the International Energy Agency (IEA) [ 7 , 8 ]. Following this progress, some solar thermal power plants have been built in many countries like the United States and China [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic and Economic Analysis of an Integrated Solar Combined Cycle System

Wang

Sajid

et al. 2018

Entropy

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Abstract:Integrating solar thermal energy into the conventional Combined Cycle Power Plant (CCPP) has been proved to be an efficient way to use solar energy and improve the generation efficiency of CCPP. In this paper, the energy, exergy, and economic (3E) methods were applied to the models of the Integrated Solar Combined Cycle System (ISCCS). The performances of the proposed system were not only assessed by energy and exergy efficiency, as well as exergy destruction, but also through varied thermodynamic parameters such as DNI and T a . Besides, to better understand the real potentials for improving the components, exergy destruction was split into endogenous/exogenous and avoidable/unavoidable parts. Results indicate that the combustion chamber of the gas turbine has the largest endogenous and unavoidable exergy destruction values of 202.23 MW and 197.63 MW, and the values of the parabolic trough solar collector are 51.77 MW and 50.01 MW. For the overall power plant, the exogenous and avoidable exergy destruction rates resulted in 17.61% and 17.78%, respectively. In addition, the proposed system can save a fuel cost of 1.86 $/MW·h per year accompanied by reducing CO 2 emissions of about 88.40 kg/MW·h, further highlighting the great potential of ISCCS.

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Section: Introductionmentioning

confidence: 99%

Thermodynamic and Economic Analysis of an Integrated Solar Combined Cycle System

Wang

Sajid

et al. 2018

Entropy

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“…Shagdar et al [9] examined the integration mechanism of solar energy into a 300 MW CFPP including replacing part of the steam extractions from turbines. Zhong et al [10] proposed a changeable integration mode according to the direct normal irradiance (DNI) to achieve the minimum levelized electricity cost. As for performance analysis, Li et al [11] developed an all-condition mechanism model for SACFPP, and simulated the system in power booting mode and fuel saving mode; solar-to-power efficiency is about 2-3% higher in the former mode.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Performance and CO2 Emission Characteristics of Solar-Aided Coal-Fired Power Plant under Off-design Conditions

Yan,

Wang,

Wang

et al. 2024

Preprint

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Solar-aided coal-fired power plant (SACFPP) is cost-effective to ensure energy security with less CO2 emission than coal-fired power plant. Its efficient and low-carbon operation is important but difficult because of the time-varying solar energy. This paper evaluates the thermodynamic performance and CO2 emission characteristics of SACFPP under off-design conditions. Three SACFPP configurations (marked as HP123, HP23 and HP3) were analyzed and the optimized operation strategy is proposed to achieve highest solar-to-power efficiency and lowest CO2 emission rate through adjusting feedwater ratio to trough collector system. The best achievable solar-to-power efficiency and CO2 emission rate depend on the power load, DNI, system safety limitation and system configuration. The annual CO2 emission reductions of the 600 MW SACFPP are about 61352.2, 54009.9 and 51769.8 tonnes under configurations of HP123, HP23 and HP3, respectively. The results can guide the SACFPP operation optimization.

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“…Zhong et al optimized the integration mode for the SACP system and applied a mixed-integer nonlinear programming approach to optimize the oil-water heat exchanger area based on the annual direct normal irradiance (DNI) distribution. The optimized results of a 150 MWe SACP system indicate that a solar aided system that can be flexibly switched among different feed-water heaters according to the DNI, and that this would result to a lower LCOE than a solar aided system that is fixed to one specific heater [33]. Some researchers have focused their efforts on the evaluation methods.…”

Section: Introductionmentioning

confidence: 99%

Annual performance analysis and optimization of a solar tower aided coal-fired power plant

Zhai

Yang

et al. 2019

Applied Energy

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The integration of solar energy into coal-fired power plants has been proven as a potential approach in the utilization of solar energy to reduce coal consumption. Moreover, solar augmentation offers low cost and low risk alternatives to stand-alone solar thermal power plants. In this study, the annual performance of a solar tower aided coal-fired power (STACP) system is investigated, and the influence of thermal storage system capacity on the annual solar generating power and annual solar-toelectricity efficiency is explored. The thermal storage system capacity is optimized to obtain the lowest levelized cost of electricity (LCOE). At the same time, the influence and sensitivity of several important economic factors are explored and assessed. Results demonstrate that compared to a coal-fired power system, the reduction in the annual average coal consumption rate of the STACP system with high direct normal irradiance (DNI), medium DNI, and low DNI are 5.79, 4.52, and 3.22 g/kWh, respectively. At a minimum, the annual coal consumption can be reduced by 14,000 t in a 600 MW power generation unit. Because the same solar field is considered under different DNI conditions, the LCOE in the high DNI,

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Optimization of a solar aided coal-fired combined heat and power plant based on changeable integrate mode under different solar irradiance

Cited by 35 publications

References 24 publications

Thermodynamic and Economic Analysis of an Integrated Solar Combined Cycle System

Thermodynamic and Economic Analysis of an Integrated Solar Combined Cycle System

Thermodynamic Performance and CO2 Emission Characteristics of Solar-Aided Coal-Fired Power Plant under Off-design Conditions

Annual performance analysis and optimization of a solar tower aided coal-fired power plant

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