4.5 Article

Energy and Exergy (2E) Analysis of an Optimized Solar Field of Linear Fresnel Reflectors for a Conceptual Direct Steam Generation Power Plant

期刊

ENERGIES
卷 14, 期 14, 页码 -

出版社

MDPI
DOI: 10.3390/en14144234

关键词

linear Fresnel reflector; direct steam generation; energy; exergy; efficiency

资金

  1. CONACYT through a graduate scholarship [863595/628521]

向作者/读者索取更多资源

This study conducted an energy and exergy (2E) analysis on various configurations of a conceptual direct steam generation solar power plant in Agua Prieta, Mexico, optimized with Fresnel reflectors coupled with a regenerative steam Rankine power cycle. This establishes a reference for future implementation of the technology in concentrated solar power plants in Mexico.
Direct steam generation is a promising alternative to conventional heat transfer fluids for solar thermal power plants using linear concentrators because water and steam do not have thermal and chemical stability problems. The novelty of this study, an energy and exergy (2E) analysis, was that it was performed on several configurations of a conceptual direct steam generation solar power plant with optimized Fresnel reflectors in Agua Prieta, Mexico coupled with a regenerative steam Rankine power cycle to quantify their efficiency and establish a reference for future implementation of this technology in concentrated solar power plants in Mexico. The thermal model was assumed to be a 1D steady-state flow and validated against results in the literature. It was then applied directly to a case study to determine the size of the solar field. The design point was the lowest solar irradiance day, and evaluating the solar multiple with the highest solar irradiance, taking care not to oversize the solar field, as suggested for solar plants without energy storage. Comparing the performance of the optimized Fresnel field against the FRESDEMO field of Plataforma Solar de Almeria, a considerable decrease in the length of the loop has been demonstrated with a low reduction in thermal efficiency.

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