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Supercritical Carbon Dioxide Cycle Analysis

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Supercritical Carbon Dioxide Cycle Analysis ( supercritical-carbon-dioxide-cycle-analysis )

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By increasing core outlet temperature 20 oC, the SFR achieves an increase of about 0.9 % for most of the cases using S-CO2 and supercritical water cycles, and about 0.5 % for traditional Rankine cycles. Supercritical water cycles are sometimes beneficial and sometimes not, depending on the performance of the S-IHX. The S-CO2 cycle produces efficiencies that are, in general, comparable to, but slightly higher than, a traditional Rankine cycle when the core outlet temperature is 510 oC. After raising the core outlet temperature to 530 oC the S-CO2 cycle has a clear advantage. The results are shown in graphical form in Figures 5.4 through 5.9. 42.5 42 41.5 41 40.5 40 39.5 39 38.5 S-CO2 Case 2 SCSteam Case3 505 510 515 520 525 530 535 Core Outlet Temperature (oC) Rankine Case 1 Figure 5.4: Efficiency comparison with PCHEs for both the P-IHX and S-IHX 42.5 42 41.5 41 40.5 40 39.5 39 38.5 S-CO2 SC Steam Rankine 505 510 515 520 525 530 535 Core Outlet Temperature (oC) Case 5 Case 6 Case 4 Figure 5.5: Efficiency comparison with a PCHE for the P-IHX and a shell-and-tube heat exchanger for the S-IHX 115 Cycle Efficiency (%) Cycle Efficiency (%)

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