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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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again using the PCHE codes or SoSaT as appropriate, and the PCS fluid temperatures were determined from the S-IHX model. With pressure drops and temperatures determined, STEAM PRO 16 and CYCLES III were used to determine the cycle efficiency. It is important to keep in mind that the option space does not include every configuration. For example, every option could also include variation in the steam temperature, or even in the type of Rankine cycle used (turbine stages, reheat, etc.). This study aims to show a broad comparison between options and inform the SFR designer about the general advantages of certain options. Furthermore, a principle goal of this research was to develop tools for future analysis. The PCHE codes, SoSaT, and CYCLES III are all useful for future researchers in this field. 5.5 Results of Efficiency Comparisons The option space described in Figure 5.2 has been tabulated in Table 5.4 along with the efficiency results for each case in Tables 5.5 and 5.6. Twenty-four cases were examined, but only 18 are displayed in Table 5.4. The last six cases (numbers 19-24) corresponded to the elimination of the intermediate loop for a pool design, which was determined to be impractical for safety and efficiency reasons. Table 5.4: Options Considered in the Efficiency study Option Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 P-IHX PCHE PCHE PCHE PCHE PCHE PCHE S-and-T S-and-T S-and-T S-and-T S-and-T S-and-T ---------- ---------- ---------- ---------- ---------- ---------- S-IHX Type PCHE Pool/Loop PCHE Pool/Loop PCHE Pool/Loop S-and-T Pool/Loop S-and-T Pool/Loop S-and-T Pool/Loop PCHE Pool/Loop PCHE Pool/Loop PCHE Pool/Loop S-and-T Pool/Loop S-and-T Pool/Loop S-and-T Pool/Loop PCHE Loop Only PCHE Loop Only PCHE Loop Only S-and-T Loop Only S-and-T Loop Only S-and-T Loop Only PCS Water (15.5 MPa) CO2 Water (23 MPa) Water (15.5 MPa) CO2 Water (23 MPa) Water (15.5 MPa) CO2 Water (23 MPa) Water (15.5 MPa) CO2 Water (23 MPa) Water (15.5 MPa) CO2 Water (23 MPa) Water (15.5 MPa) CO2 Water (23 MPa) 112

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