Thermo economic Analysis of Different Configurations of combined Cycle Coupled with a Parabolic Trough Solar Plant
Journal Title: International Journal of engineering Research and Applications - Year 2017, Vol 7, Issue 12
Abstract
The parabolic trough technology is currently one of the most widespread solar thermal systems forelectricity production. This paper is a thermo-economic study of an Integrated Solar Combined Cycle (ISCC) with Direct Steam Generation (DSG) wherein the solar field is part of the economizer of the heat recovery steam generator (HRSG).Two configurations were analyzed: both included two pressure levels without reheater; in the first one the parabolic trough plant was the high pressure economizer and in the second one the low pressure superheater of the HRSG (heat recovery steam generator). A Euro Trough (ET100) concentrator was considered in this study, the working fluid was water with direct steam generation. Evaporation in the absorber was not an issue since the solar plant was the economizer of the HRSG and an approach point greater than 3°C was considered. The main objective was to obtain the optimum design of the different sections of the boiler and the size of the parabolic field. Optimization was achieved using a Genetic Algorithm developed in previous works by the authors with good results. The method was applied here to configurations that included the parabolic trough plant. As a result, a thermo-economically optimum design for the parabolic trough plant as a section of the HRSG was obtained. The results showed that the solar field increased the power and efficiency of the combinedcycle plant during the operation and made it less susceptible to climate conditions.
Authors and Affiliations
M. Duran, E. Rincón
Keywords
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