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Article

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

1
Departamento de Ingeniería Energética, Universidad Nacional de Educación a Distancia (UNED), 28040 Madrid, Spain
2
Departamento de Ingeniería Energética, Universidad Politécnica de Madrid (UPM), 28006 Madrid, Spain
*
Author to whom correspondence should be addressed.
Entropy 2020, 22(4), 476; https://doi.org/10.3390/e22040476
Received: 19 March 2020 / Revised: 6 April 2020 / Accepted: 18 April 2020 / Published: 21 April 2020
(This article belongs to the Special Issue Thermodynamic Optimization of Complex Energy Systems)
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. View Full-Text
Keywords: ISCC; hybridization; concentrating solar power (CSP); advanced thermodynamic cycles; recuperative gas turbine; recuperative and double expansion (RDE) cycle ISCC; hybridization; concentrating solar power (CSP); advanced thermodynamic cycles; recuperative gas turbine; recuperative and double expansion (RDE) cycle
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MDPI and ACS Style

Rovira, A.; Abbas, R.; Muñoz, M.; Sebastián, A. Analysis of an Integrated Solar Combined Cycle with Recuperative Gas Turbine and Double Recuperative and Double Expansion Propane Cycle. Entropy 2020, 22, 476. https://doi.org/10.3390/e22040476

AMA Style

Rovira A, Abbas R, Muñoz M, Sebastián A. Analysis of an Integrated Solar Combined Cycle with Recuperative Gas Turbine and Double Recuperative and Double Expansion Propane Cycle. Entropy. 2020; 22(4):476. https://doi.org/10.3390/e22040476

Chicago/Turabian Style

Rovira, Antonio, Rubén Abbas, Marta Muñoz, and Andrés Sebastián. 2020. "Analysis of an Integrated Solar Combined Cycle with Recuperative Gas Turbine and Double Recuperative and Double Expansion Propane Cycle" Entropy 22, no. 4: 476. https://doi.org/10.3390/e22040476

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