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Comparison of Different Technologies for Integrated Solar Combined Cycles: Analysis of Concentrating Technology and Solar Integration

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E.T.S. Ingenieros Industriales, Universidad Nacional de Educación a Distancia (UNED), c/ Juan del Rosal, 12, 28040 Madrid, Spain
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E.T.S. Ingenieros Industriales, Universidad Politécnica de Madrid, c/ José Gutierrez Abascal, 2, 28006 Madrid, Spain
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E.T.S. Ingeniería, Universidad de Huelva, ctra. Huelva-Palos de la Frontera, s/n, La Rábida, 21819 Huelva, Spain
*
Author to whom correspondence should be addressed.
Energies 2018, 11(5), 1064; https://doi.org/10.3390/en11051064
Received: 16 March 2018 / Revised: 20 April 2018 / Accepted: 23 April 2018 / Published: 25 April 2018
This paper compares the annual performance of Integrated Solar Combined Cycles (ISCCs) using different solar concentration technologies: parabolic trough collectors (PTC), linear Fresnel reflectors (LFR) and central tower receiver (CT). Each solar technology (i.e. PTC, LFR and CT) is proposed to integrate solar energy into the combined cycle in two different ways. The first one is based on the use of solar energy to evaporate water of the steam cycle by means of direct steam generation (DSG), increasing the steam production of the high pressure level of the steam generator. The other one is based on the use of solar energy to preheat the pressurized air at the exit of the gas turbine compressor before it is introduced in the combustion chamber, reducing the fuel consumption. Results show that ISCC with DSG increases the yearly production while solar air heating reduces it due to the incremental pressure drop. However, air heating allows significantly higher solar-to-electricity efficiencies and lower heat rates. Regarding the solar technologies, PTC provides the best thermal results. View Full-Text
Keywords: integrated solar combined cycle; parabolic trough collector; linear Fresnel reflector; central receiver system integrated solar combined cycle; parabolic trough collector; linear Fresnel reflector; central receiver system
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Rovira, A.; Sánchez, C.; Valdés, M.; Abbas, R.; Barbero, R.; Montes, M.J.; Muñoz, M.; Muñoz-Antón, J.; Ortega, G.; Varela, F. Comparison of Different Technologies for Integrated Solar Combined Cycles: Analysis of Concentrating Technology and Solar Integration. Energies 2018, 11, 1064.

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