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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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Appendix B. RGRC and RGRCMS Code Manual B.1 Introduction This Appendix is intended to be a user’s manual for the RGRC and RGRCMS codes. For further insights into compressor design the manual for CCD and CCOD, by Jerry Wood, can be useful. However, the operation of CCD/CCOD is very different from RGRC and RGRCMS and they will not produce good results for S-CO2. B.2 Inputs and Outputs The input file, input.txt, for RGRC is shown in Figure B.1. Input File for Centrifugal Compressor Design Code RGRC 1 !Fluid indicator, 1-CO2 1858.7 !Mass Flow rate of the Compressor Stage (kg/s) 2.608 !Desired Static-to-Static Pressure Ratio 3600.00 !Operating RPM 30.0 !Velocity of fluid at inlet (m/s) 0.100 !Hub diameter at inlet (m) 7667300.0 !Static Pressure at inlet (Pa) 1285.6 !Entropy in inlet pipe away from compressor (J/kgK) 19 !Number of blades at inlet 0 !Splitter Blades? 1-Yes, 0-No 0.0030 !Thickness of blades at inlet (m) 0.0025 !Thickness of blades at outlet (m) 2.00 !Axial height of blades at outlet in % of D2 2.00 !Blade clearance as a % of blade height 40.0 !Impeller Backsweep (degrees) 0.00 !Abs. flow angle at impeller inlet(deg) (normally zero) 0.00 !Slope of hub at inlet (degrees) 0.00 !Slope of casing at inlet (degrees) 2.00 !Area ratio of vaned diffuser 0 !0-vaned diffuser, 1-pipe diffuser 1.10d0 !The ratio of R3 to R2 35 !number of diffuser vanes 15.0 !Curvature of diffuser vanes 0.40 !Initial Guess of Ratio D1T to D2 136

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