Multistage configurations for hybrid thermosolar gas turbine power plants   C. Miguel, R.P. Merchán, M.J. Santos, A. Calvo Hernández and A. Medina   2017/04/25

Abstrac

This work presents a thermodynamic model for a hybrid multistage Brayton thermosolar plant, with the aim of evaluating the efficiency and the power generation in different plant configurations. Improvements with respect a hybrid single stage Brayton thermosolar plant are proposed. This type of plants have two main energy sources for its operation, one from solar radiation, and the other one from the fuel combustion in a combustion chamber, making the values of the fuel consumption and the greenhouse emissions lower than other types of electric power generation plants. Moreover, this technology allows a stable power output (independent of solar irradiation fluctuations) without thermal storage systems.

Authors and affiliations

C. Miguel, R.P. Merchán, M.J. Santos, A. Calvo Hernández and A. Medina
Department of Applied Physics. University of Salamanca. (Spain)

Key word

Hybrid thermosolar plant, multistage Brayton cycle, thermodynamic model with irreversibilities, global plant efficiency, greenhouse emissions.

References

[1] O. Behar, A. Khellaf, K. Mohammedi. “A review of studies on central receiver solar termal plants”. Renew. Sust. Energ. Rev. 23: 12-39 (2013).
[2] R. Korzynietz, J. A. Brioso, A. del Río, M. Quero, M. Gallas, R. Uhlig, M. Ebert, R. Buck, D. Teraji. “Solugas - Comprehensive analysis of the solar hybrid Brayton plant”. Sol. Ener., 135, 578-589 (2016).
[3] M. J. Santos, R. P. Merchán, A. Medina, and A. Calvo Hernández. “Seasonal thermodynamic prediction of the performance of a hybrid solar gas-turbine power plant”. Energ. Convers. Manage., 115, 89-102 (2016).
[4] S. Sánchez-Orgaz, A. Medina, A. Calvo Hernández. “Thermodynamic model and optimization of a multi-step irreversible Brayton cycle”. Energ. Conv. Manage., 51, 2134-43 (2010);
[5] D. Olivenza-León, A. Medina, A. Calvo. “Thermodynamic modeling of a hybrid solar-turbine power plant”. Energ. Conv. Manage. 93: 435-447 (2015).
[6] M. Romero, R. Buck, E. Pacheco. “An Update on Solar Central Receiver Systems, Projects, and Technologies”. Transactions of the ASME, 124: 98 (2002).
[7] Emissions factors for greenhouse gas inventories: Table 1 stationary combustion emission factors. http://www.epa.gov/ghgreporting/documents/pdf/2013/documents/memo-2013-technical-revisions.pdf