A newly proposed supercritical carbon dioxide Brayton cycle configuration to enhance energy sources integration capability

초록

A new cycle layout for the supercritical carbon dioxide with its better integration capabilities with heat sources for increased temperature difference across the receiver has been proposed and analyzed in the current study. Design point analysis of the proposed cycle layout and the available cycle layouts in literature, i.e., regenerative, recompression, intercooling, and partial cooling cycles, have been performed and compared. Moreover, the effect of turbine inlet temperature, compressor's inlet pressure, and compressor inlet temperature on the cycle's efficiency, specific work, and integration capabilities with heat source have been studied for all the cycle layouts, including the proposed cycle layout. Results suggest that the proposed cycle's configuration exhibits better integration capabilities than other cycle layouts studied in this work contributing to cost-effective power generation. The cycle's efficiency for the current cycle is comparable with the intercooling cycle, where the specific work value for the proposed process is found maximum among all the cycles. Further, the UA values for the proposed cycle are found up to 33% smaller than the intercooling cycle. (c) 2021 Elsevier Ltd. All rights reserved.

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