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Título
Thermodynamic model of a hybrid Brayton thermosolar plant
Autor(es)
Materia
Thermosolar gas-turbines
NATURAL SCIENCES
Thermal energy engineering
Hybrid plants
Thermodynamic model
Variable solar irradiance
Global plant performance
Seasonal evolution
Fecha de publicación
2016
Editor
Elsevier Science Publishers (Amsterdam, Países Bajos)
Citación
Merchán, R.P., Santos, M.J., Medina, A. and Calvo Hernández, A. (2016). Thermodynamic model of a hybrid Brayton thermosolar plant. Renewable Energy, 128, Part B, pp. 473-483
Resumen
[EN]We present a thermodynamic model for the prediction of the performance records of a solar hybrid gas
turbine power plant. Variable irradiance and ambient temperature conditions are considered. A serial
hybridization is modeled with the aim to get an approximately constant turbine inlet temperature, and
thus to deliver to the grid a stable power output. The overall thermal efficiency depends on the efficiencies
of the involved subsystems and the required heat exchangers in a straightforward analytical
way. Numerical values for input parameters are taken from a central tower heliostat field recently
developed near Seville, Spain. Real data for irradiance and external temperature are taken in hourly
terms. Curves for the evolution of plant efficiencies (solar, gas turbine, fuel conversion efficiency, overall
efficiency, etc.) and solar share are presented for representative days of each season. The cases of nonrecuperative
and recuperative plant configurations are shown. Estimations of the hourly evolution of
fuel consumption are simulated as well as savings between the hybrid solar operation model and the
pure combustion mode. During summer, fuel saving can reach about 11.5% for a recuperative plant layout.
In addition, plant emissions for several configurations are presented.
© 2017
URI
ISSN
0960-1481
DOI
10.1016/j.renene.2017.05.081
Colecciones
- GIOETFE. Artículos [48]