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• W2994367088 abstract "The supercritical carbon dioxide cycle (sCO2) has been chosen as the most promising cycle to meet the SunShot goals with a power block that has the potential to achieve thermal efficiencies of 50+% with a turbine inlet temperature of 720oC. While this cycle has significant potential, it is a fairly new cycle and therefore the costs and performance of the cycle are not known to the level required for detailed economic analysis. There are also multiple cycle configurations that may be used and the choice of configuration could depend on size, cost constraints, efficiency, cooling mode, O&M costs, etc. Each of the variants has particular advantages and drawbacks that have to be understood. The most cost effective way to understand these variants is to use models that allow us to predict the performance of the cycles linked to the heat source (solar thermal energy). In order to do this these models, need to be developed and improved to better predict the costs and performance of the cycle. One of the issues identified with the supercritical Brayton cycle is the fact that a large amount of internal heat exchange is required in order for it to realize its efficiency potential. To address this, recuperators of the Printed Circuit Heat Exchanger (PCHE) design have been primarily considered. While PCHEs are fairly advanced technology and have significant potential there are several drawbacks associated with them. The first being their cost; it is estimated that the two recuperators in a recompression Brayton cycle will cost more than 30% of the entire power block. Another major issue is the in service performance and lack of ability to repair or easily clean the recuperators. If there is a defect in a diffusion bond, fouling or plugging of the channels or mechanical damage due to rapid thermal transient then the entire PCHE may need to be replaced. The third issue is the lack of data and information on the performance of PCHEs at the scale that would be required even for a small 10 MWe plant. To date PCHE heat exchangers have not been constructed at this size and it is necessary to have multiple modules headered together in order to be able to recuperate up to the 40 MWth required in even a small, 10 MWe plant." @default.
• W2994367088 created "2019-12-13" @default.
• W2994367088 creator A5078284361 @default.
• W2994367088 date "2019-09-01" @default.
• W2994367088 modified "2023-09-23" @default.
• W2994367088 title "Advanced supercritical carbon dioxide cycles" @default.
• W2994367088 doi "https://doi.org/10.2172/1566743" @default.
• W2994367088 hasPublicationYear "2019" @default.
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