Abstract
An improvement of supercritical carbon dioxide Brayton cycle with regeneration coupled with a (carbon dioxide/ethane) shielded as a second cycle before starting the cooling phase in a solar tower installation was carried out. The power block unit in the cycle, as mentioned above designed to produce 160 MWe in the Ouarzazate region, where a gigantic solar project conducted in Morocco with a design point DNI evaluated as 823 W/m2. So, the aim to compare the performance of the s-ethane against the s-CO2, operating in the secondary cycle, two critical parameters studied are, the first one is the effect of turbine inlet temperature on net power. And the second one is the effect of secondary Brayton cycle pressure on the system efficiency. The cycle efficiency, founded to be 58% at high turbine inlet temperature by including an aided s-ethane cycle. The research work is in progress. In perspectives, specific other possible configurations and other trans-critical fluids will address in the secondary Brayton cycle.
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