Feasibility study of hybrid thermoelectric plants using CSP technology and fossil fuel: simulation scenarios
Fábio Cordeiro de Lisboa1; Alina Mikhailovna Gilmanova Cavalcante2; Alexandre Caires Rodrigues1; Mario Benjamin Siqueira1; Julien Guigné3
1 UnB; 2 UNICAMP; 3 Arts et Métiers ParisTech
doi:10.20906/CPS/COB-2015-1197
Resumo
Due to the rapid advance in technology, a new generation of power plants has emerged: the concentrated solar power (CSP). It is a renewable energy system that can be combined with large-scale energy storage systems. CSP holds many promises for the countries with high direct solar radiation, as Brazil. However, there are many problems regarding the viability of these plants in the emerging countries such as high capital costs, lack of national technology and qualified professionals. Hybridization of existing power plants with solar energy could be a possible gateway for the technology deployment. This paper presents the technical and economic feasibility analysis of a steam super-heater plant powered by CSP for electricity production. Such hybridization permits the reduction of CO2 emissions and retrenchment in the long term. In this context, the performances of four different systems of thermoelectric power generation were compared: (i) reheating cycle - superheated steam generated by boiler and it expansion in the first turbine using CSP for reheating second expansion turbine; (ii) saturated cycle - generating saturated steam in a boiler and superheating it using CSP; (iii) supercritical plant - superheated steam production in a boiler and heating at supercritical steam in CSP and (iv) conventional cycle and CSP working in parallel. The direct irradiation data available at the Brazilian solar atlas were analyzed, looking for the best location of power plant installation. In addition to the solar resource data, other criteria as economic, social, environmental and availability of transmission lines were taking into account. The decision matrix with performance indicators helped in the decision-making process of location selection. Comparing to other scenarios the obtained results showed several advantages of scenario (iv) - conventional cycle and CSP working in parallel using solar power towers without thermal storage. Research result as well revealed Santa Maria da Vitória town, Bahia region, as a better place
Palavras-chave: concentrated solar power (CSP); Solar irradiation data; Hybrid thermoelectric; Reheating vapor cicle