Advanced Nuclear Power Technology Program A Supercritical Carbon Dioxide Cycle for Next Generation Nuclear Reactors

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Advanced Nuclear Power Technology Program A Supercritical Carbon Dioxide Cycle for Next Generation Nuclear Reactors ( advanced-nuclear-power-technology-program-supercritical-carb )

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Figure 11.1 Figure 11.2 Figure 11.3 Figure 11.4 Figure 11.5 Figure 11.6 Figure 11.7 Figure 11.8 Figure 11.9 Figure 12.1 Figure 12.2 Figure 12.3 Figure 12.4 Figure 12.5 Figure 12.6 Figure 12.7 Figure 12.8 Figure 12.9 Figure 12.10 Figure 13.1 Figure 13.2 Figure 13.3 Figure 13.4 Figure 13.5 Figure 13.6 Figure 13.7 Figure 13.8 Figure 13.9 Figure 13.10 Figure 13.11 Figure 13.12 Figure 13.13 Figure 13.14 Figure 13.15 Figure 13.16 Figure 13.17 Figure 13.18 Figure 13.19 High-low pressure inventory control 242 High-high pressure inventory control 243 Different bypass control schemes 245 Effect of different control schemes on Helium Brayton cycle efficiency [from Xinglong, 1990] 246 Possible location of bypass and throttling valves 248 Turbine characteristics 249 Compressor characteristics 249 Performance of bypass control 251 Recompressed fraction and bypass flow 252 Temperature – entropy diagrams of helium Brayton cycle with 3 compressors and supercritical recompression Brayton cycle 256 Thermal efficiency for the multiply re-heated and inter-cooled helium Brayton cycle at 600oC turbine inlet temperature 261 Efficiency improvement for every added stage of re-heat and inter-cooling (600oC) 261 Thermal efficiency for the multiply re-heated and inter-cooled helium Brayton cycle at 900oC turbine inlet temperature 262 Efficiency improvement for 1 and 2 stages of re-heat and inter-cooling and for 2 inter- coolings (900oC) 262 Supercritical CO2 recompression cycle layout 264 Helium Brayton cycle layout [from Wang et al., 2002] 264 Superheated steam Rankine cycle layout [from Dostal et al., 2002] 265 Supercritical steam Rankine cycle layout [from Oka and Koshizuka, 2000] 265 Cycle efficiency comparison of advanced power cycles 266 Simple supercritical CO2 Brayton cycle 271 Effect of main parameter optimization on recuperated Brayton cycle efficiency 272 Comparison of cycle losses [from Angelino, 1969] 273 Supercritical CO2recompression cycle layout 274 Optimum size of heat exchangers for recompression cycles 275 Effect of compressor inlet temperature on cycle efficiency for different compressor inlet temperatures 276 Effect of turbine inlet temperature and main compressor outlet pressure on efficiency 277 Comparison of turbine sizes 280 Supercritical CO2 PCU 282 Comparison of GT-MHR PCU and the supercritical CO2 PCU 282 Helium/CO2 Indirect cycle cost relative to the direct cycle for different reactor inlet and outlet temperatures 284 PbBi/CO2 Indirect cycle cost relative to the direct cycle for different reactor inlet and outlet temperatures 285 Relative costs of different helium/CO2 indirect cycle options 286 Relative costs of different PbBi/CO2 indirect cycle options 286 Recompression cycle with one and two stages of re-heat 287 Possible location of bypass and throttling valves 289 Performance of bypass control 290 Net efficiency and relative costs for different power cycles ($/kWe) 291 Cycle efficiency comparison of advanced power cycles 293 xvii

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