Radial Compressor Options for Supercritical CO2 Power Conversion Cycles

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Radial Compressor Options for Supercritical CO2 Power Conversion Cycles ( radial-compressor-options-supercritical-co2-power-conversion )

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3.4 Recompression Compressor Operating conditions for the recompression compressor are listed in Table 3.5. Table 3.5 Working Conditions for the Recompression Compressor Mass Flow Rate (kg/s) 1331 Shaft Rotational Speed (RPM) 3600 Total-to-total Pressure Ratio 2.6 InletTotalTemperature*(oC) 73 Inlet Total Pressure* (MPa) 8.0 If the efficiency of the radial compressor is estimated as 85%, using NIST fluid property software, the inlet and exit conditions are estimated and listed in Table 3.6. Table 3.6 The Fluid Property at the Inlet and the Exit of the Recompression Compressor Inlet Exit T(oC) 73 163.8 P (MPa) 8 20.8 ρ(kg/m3) 169.3 317.0 The mean density is 243.2kg/m3. 3.4.1 One-Stage Design Using the procedure described in Section 3.2, the performance and size of the recompression compressor can be obtained. The key design parameters are listed in Table 3.7. Table 3.7 Key Design Parameters and Performance for the Recompression Compressor Using a Single Radial Stage 300MW PCS unit recompression compressor. Ns Ds Efficiency Impeller diameter Impeller tip speed 0.254 10.0 72.9% 1.546 m 291 m/s 19

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