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Entropy 2014, 16(8), 4246-4259; doi:10.3390/e16084246

Thermoeconomic Evaluation of Integrated Solar Combined Cycle Systems (ISCCS)

Energy and Fluid Mechanics Department (ETSII), Universidad Politécnica de Madrid, c/José Gutiérrez Abascal, 2, 28006 Madrid, Spain
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Received: 4 June 2014 / Revised: 3 July 2014 / Accepted: 23 July 2014 / Published: 28 July 2014
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Abstract

Three alternatives for integrating a solar field with the bottoming cycle of a combined cycle plant are modeled: parabolic troughs with oil at intermediate and low cycle pressures and Fresnel linear collectors at low cycle pressure. It is assumed that the plant will always operate at nominal conditions, using post-combustion during the hours of no solar resource. A thermoeconomic study of the operation of the plant throughout a year has been carried out. The energy and exergy efficiencies of the plant working in fuel only and hybrid modes are compared. The energy efficiencies obtained are very similar; slightly better for the fuel only mode. The exergy efficiencies are slightly better for hybrid operation than for fuel-only mode, due to the high exergy destruction associated with post-combustion. The values for solar electric efficiency are in line with those of similar studies. The economic study shows that the Fresnel hybridization alternative offers similar performance to the others at a significantly lower cost. View Full-Text
Keywords: Fresnel collectors; parabolic trough; combined cycle; hybrid plant Fresnel collectors; parabolic trough; combined cycle; hybrid plant
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Martín, J.R.; Rodríguez, E.B.; Paniagua, I.L.; Fernández, C.G. Thermoeconomic Evaluation of Integrated Solar Combined Cycle Systems (ISCCS). Entropy 2014, 16, 4246-4259.

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