Proposal and analysis of an integrated solar combined cycle with partial recuperation

Rovira, Antonio; Abbas, Rubén; Sánchez, Consuelo; Muñoz, Marta

doi:10.1016/j.energy.2020.117379

Cited by 22 publications

(17 citation statements)

References 33 publications

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“…A conventional alternative for the assessment of solar contribution in ISCC (valid only for boosting strategy) is the use of the incremental solar-to-electricity efficiency [ 36 ], which relates the incremental production of the hybrid system to the supplied solar energy supplied. In this work, a more advanced efficiency defined in [ 37 ] is used, namely internal solar-to-electricity efficiency ( η ise ), which assesses the individual contribution of each heat source according to the irreversibility associated with each heat source:

where E ise is:

…”

Section: Methodsmentioning

confidence: 99%

Analysis of an Integrated Solar Combined Cycle with Recuperative Gas Turbine and Double Recuperative and Double Expansion Propane Cycle

Rovira

Abbas

Muñoz

et al. 2020

Entropy

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The main objective of this paper is to present and analyze an innovative configuration of integrated solar combined cycle (ISCC). As novelties, the plant includes a recuperative gas turbine and the conventional bottoming Rankine cycle is replaced by a recently developed double recuperative double expansion (DRDE) cycle. The configuration results in a fuel saving in the combustion chamber at the expense of a decreased exhaust gas temperature, which is just adequate to feed the DRDE cycle that uses propane as the working fluid. The solar contribution comes from a solar field of parabolic trough collectors, with oil as the heat transfer fluid. The optimum integration point for the solar contribution is addressed. The performance of the proposed ISCC-R-DRDE design conditions and off-design operation was assessed (daily and yearly) at two different locations. All results were compared to those obtained under the same conditions by a conventional ISCC, as well as similar configurations without solar integration. The proposed configuration obtains a lower heat rate on a yearly basis in the studied locations and lower levelized cost of energy (LCOE) than that of the ISCC, which indicates that such a configuration could become a promising technology.

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where E ise is:

…”

Section: Methodsmentioning

confidence: 99%

Analysis of an Integrated Solar Combined Cycle with Recuperative Gas Turbine and Double Recuperative and Double Expansion Propane Cycle

Rovira

Abbas

Muñoz

et al. 2020

Entropy

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Section: The Overall Thermal Efficiency Of the Iscc Power Plantmentioning

confidence: 99%

“…This may be because the target of the ISCC is not to increase the overall thermal efficiency of the Brayton cycle, like the combined cycle, but to increase the economic feasibility of the solar power plants. Elimination of the thermal storage system reduces the cost of the power plant [24][25][26] However, Figure 3 shows that the exergy destruction in the combustion chamber decreases slightly with the increase of the ambient temperature under the combined cycle regime (0 MW solar heat input). However, Figure 3 shows that the exergy destruction in the combustion chamber decreases slightly with the increase of the ambient temperature under the combined cycle regime (0 MW solar heat input).…”

Section: Exergy Destruction In Each Component Of the Iscc As A Percentage Of The Total Exergy Destruction In The Whole Isccmentioning

confidence: 99%

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Energy and Exergy Analyses of an Existing Solar-Assisted Combined Cycle Power Plant

et al. 2020

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Solar-assisted combined cycle power plants (CCPPs) feature the advantages of renewable clean energy with efficient CCPPs. These power plants integrate a solar field with a CCPP. This integration increases the efficiency of solar power plants while decreasing the CO2 emissions of the CCPPs. In this paper, energy and exergy analyses were performed for an existing solar-assisted CCPP. The overall thermal efficiency and the exergetic efficiency of each component in the power plant were calculated for different solar field capacities. Also, a parametric study of the power plant was performed. The analysis indicated that the exergetic efficiency of the power plant components has its lowest value in the solar field while the condenser has the lowest exergetic efficiency in the combined cycle regime of operation. Further, a parametric study revealed that the thermal efficiency and the exergetic efficiency of the power plant as a whole decrease with increasing ambient temperature and have their highest values in the combined cycle regime of operation. Owing to these results, an investigation into the sources of exergy destruction in the solar field was conducted.

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“…Moreover, it reduces the release of greenhouse gas. Also, the elimination of the thermal storage system reduces the plant cost [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Investigating an Integrated Solar Combined Cycle Power Plant

Rashad¹

2021

GJES

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Using solar energy standalone to generate electricity has high investment risk. This is due to the need to energy storage systems to ensure electricity generation during the night. For this reason the hybridization of renewable energy resources and fossil fuel has been motivated. In an Integrated solar combined-cycle (ISCC) the solar thermal energy is integrated into combined cycle gas turbine (CCGT) power plant. The aim of this study is to evaluate the impact of addition of solar energy to a CCGT at both design and off design conditions of solar thermal input and ambient temperature.The evaluation was fulfilled by studying the main performance indicators for hybridization of combined cycle (CC) with solar energy. These factors are the solar conversion efficiency, solar fraction, and boosting factor.The study was implemented on Kurymat ISCC, in Egypt. The plant is designed to produce 135 MWe. It composed of parabolic trough solar field integrated with a conventional CCGT power Plant. The design solar heat input is 50 MWth at 20 °C dry bulb ambient temperature. The CCGT consists of one gas turbines of 70 MWe, one HRSG that produce steam at pressure 90 bar and a steam turbine of 65 MWe. The study shows that, for night mode operation (no solar) changing the ambient temperature from 5oC to 35 °C, the plant efficiency drops from 0.53 to 0.51 and the output power changes from 119.2 MW to 99.69 MW. Also, for day mode (with solar) at design solar thermal input and ambient temperature the ISCC efficiency is higher than CC efficiency when we neglect the solar fuel cost, while the efficiency drops below that of the CC if the solar fuel cost is considered. The power output reduces with increasing the ambient temperature and increases with increasing the solar thermal input.

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Proposal and analysis of an integrated solar combined cycle with partial recuperation

Cited by 22 publications

References 33 publications

Analysis of an Integrated Solar Combined Cycle with Recuperative Gas Turbine and Double Recuperative and Double Expansion Propane Cycle

Analysis of an Integrated Solar Combined Cycle with Recuperative Gas Turbine and Double Recuperative and Double Expansion Propane Cycle

Energy and Exergy Analyses of an Existing Solar-Assisted Combined Cycle Power Plant

Investigating an Integrated Solar Combined Cycle Power Plant

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