One of the option to make concentrated solar power competitive from economic point of view consists of adopting innovative power cycle which can efficiently exploit temperature up to 700°C. This work assesses the potentiality of pure N2O4 and mixed with CO2 when applied to solar tower plant using liquid as heat transfer fluid. N2O4has a high critical temperature (158°C) which limits the compression work boosting the power block conversion efficiency. Results show that the best performance are achieved by the N2O4 mixture that obtains an overall solar-to-electric efficiency of about 26.3%. A 78%-22% CO2-N2O4 mixture achieves solar-to-electric efficiency of 25.3%. Both solutions seem promising with respect to the considered recompressed sCO2 cycle.
Innovative fluids for gas power cycles coupled with solar tower systems
Binotti, Marco;Manzolini, Giampaolo
2018-01-01
Abstract
One of the option to make concentrated solar power competitive from economic point of view consists of adopting innovative power cycle which can efficiently exploit temperature up to 700°C. This work assesses the potentiality of pure N2O4 and mixed with CO2 when applied to solar tower plant using liquid as heat transfer fluid. N2O4has a high critical temperature (158°C) which limits the compression work boosting the power block conversion efficiency. Results show that the best performance are achieved by the N2O4 mixture that obtains an overall solar-to-electric efficiency of about 26.3%. A 78%-22% CO2-N2O4 mixture achieves solar-to-electric efficiency of 25.3%. Both solutions seem promising with respect to the considered recompressed sCO2 cycle.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
