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Figure 2.1 Figure 2.2 Figure 2.3 Figure 2.4 Figure 2.5 Figure 2.6 Figure 2.7 Figure 2.8 Figure 2.9 Figure 2.10 Figure 2.11 Figure 2.12 Figure 2.13 Figure 2.14 Figure 2.15 Figure 2.16 Figure 2.17 Figure 2.18 Figure 2.19 Figure 3.1 Figure 3.2 Figure 3.3 Figure 3.4 Figure 3.5 Figure 3.6 Figure 4.1 Figure 4.2 Figure 4.3 Figure 4.4 Figure 4.5 Figure 4.6 Figure 4.7 Figure 4.8 Figure 4.9 Figure 4.10 Figure 4.11 Figure 4.12 Figure 4.13 Figure 4.14 Figure 4.15 Figure 4.16 Figure 4.17 Figure 4.18 Figure 4.19 Figure 4.20 Figure 4.21 Figure 4.22 List of Figures Simple Brayton cycle layout 10 CO2 turbine work 10 CO2 compressor work 11 Recuperator effectiveness of a Brayton cycle without inter-cooling 13 Recuperator effectiveness of a Brayton cycle without inter-cooling (top view) 14 Temperature difference profile in the recuperator of a simple Brayton cycle 15 Enthalpy - temperature diagram of CO2 [from Feher, 1967] 17 Effect of pressure drops on cycle efficiency [from Feher, 1967] 18 Effect of maximum and minimum temperature on the Feher cycle [from Feher, 1967] 18 Condensation cycles considered in [Angelino, 1968] 20 Cycle efficiency comparison [from Angelino, 1968] 21 Carbon dioxide turbine for 1000 MW net output, inlet 30 MPa, 565oC [from Angelino, 1968]22 Cycles investigated by Angelino in 1969 [from Angelino 1969] 23 Summary of the performance of different CO2 cycles [from Angelino, 1969] 25 Schematic of the Hoffman – Feher 150 kWe S-CO2 power cycle module [from Hoffman and Feher, 1970] 27 Temperature entropy diagrams of the investigated cycle layouts [from Dievoet, 1968] 28 Comparison of component sizes for different power cycles [from Strub and Frieder, 1970] 30 Schematics and temperature entropy diagram of the CO2 binary cycle [from Gokhstein and Verkhivker, 1969] 31 Summary of results of the ECAS evalution [from Corman, 1976] 33 Subroutines COMPRESS and EXPAND flow chart 44 PCHE cross-section 53 Heat exchanger nodalization 54 Subroutine SIMPCYC flow chart 65 Subroutine RECOMP flow chart 66 Program CYCLES (for simple Brayton cycle optimization) 71 Closed Brayton cycle without inter-cooling 74 Efficiency vs pressure ratio for 60m3 total heat exchanger volume 76 Variation of specific heat of CO2 near the critical point (7.38 MPa, 30.98oC) 76 Pre-cooler characteristics 77 Pre-cooler pumping power and water flow 77 Fractional pressure drops for 60m3 total heat exchanger volume 78 Recuperator parameters vs. the pressure ratio 79 Cycle Efficiency Optimization for 60m3 total heat exchanger volume 82 Effect of pre-cooler volume fraction on cycle efficiency 83 Effect of pre-cooler length on cycle efficiency 83 Effect of recuperator length on cycle efficiency 84 Cycle parameters as a function of heat exchanger volume 86 Efficiency reduction due to the pumping power at optimum pressure ratio 86 Optimum design values for the simple Brayton cycle 87 Fractional pressure drops for optimized design 88 Performance of the recuperator 89 CO2 mass flow rate and cooling water outlet temperature 90 Pre-cooler pumping power and mass flow rate 91 Re-heated Brayton Cycle Layouts 93 Effect of different pressure ratio split between the reheat stages 94 Effect of re-heat on cycle efficiency Efficiency change caused by re-heat 95 96 xivPDF Image | Supercritical Carbon Dioxide Cycle for Next Generation Nuclear Reactors
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