Supercritical Carbon Dioxide Cycle Analysis

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Supercritical Carbon Dioxide Cycle Analysis ( supercritical-carbon-dioxide-cycle-analysis )

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3.3.7 Off-Design Compressor Performance...............................................................71 3.4 The Multi-Stage Code RGRCMS................................................................................72 3.5 S-CO2 Compressor Designs.......................................................................................73 3.5.1 The Main Compressor Design........................................................................73 3.5.2 The Recompressing Compressor Design............................................................75 3.5.3 Benchmarking RGRC and RGRCMS...............................................................76 3.6 Chapter Summary..................................................................................................78 3.7 Nomenclature for Chapter 3.......................................................................................80 4 BALANCE OF PLANT OPTIONS......................................................................82 4.1 Introduction..........................................................................................................82 4.1.1 Necessary Tools for Analysis........................................................................82 4.1.2 Heat Losses in Intermediate Piping and Pumping Power of an SFR............................83 4.2 Alternate Fluids in the Intermediate Loop......................................................................88 4.3 Eliminating the Intermediate Loop..............................................................................89 4.4 PCHE versus Shell-and-Tube Heat Exchangers...............................................................90 4.4.1 The Shell-and-Tube Code SoSaT....................................................................91 4.4.2 Expanding the Capabilities of the PCHE Codes..................................................100 4.5 Benchmarking Heat Exchanger Codes........................................................................100 4.6 S-CO2, Traditional Rankine, or Supercritical Steam PCS...................................................101 4.7 Chapter Summary................................................................................................103 4.8 Nomenclature for Chapter 4.....................................................................................104 5 INCREASING THE EFFICIENCY OF THE SFR.................................................106 5.1 Introduction.......................................................................................................106 5.2 Options for Increasing Core Outlet Temperature............................................................106 5.3 A Reference Design: The ABR-1000..........................................................................107 5.4 Option Space......................................................................................................108 5.4.1 Methodology..........................................................................................110 5.5 Results of Efficiency Comparisons.............................................................................112 5.6 The Choice of Cycle Pressure for Rankine Cycles...........................................................118 5.7 Chapter Summary................................................................................................119 6 SUMMARY, CONCLUSIONS AND RECCOMENDATIONS..................................121 6.1 Summary...........................................................................................................121 6.2 Conclusions........................................................................................................121 6.2.1 Conclusions on the S-CO2 Cycle and its Compressors...........................................121 6.2.2 Conclusions on Sodium Fast Reactors.............................................................122 6.3 Recommended Future Work ....................................................................................123 6.3.1 S-CO2 Compressors..................................................................................123 6.3.2 The S-CO2 Cycle as a Whole........................................................................124 6.3.3 SFR Heat Exchangers................................................................................124 6.3.4 Safety and Availability Consequences of SFR Design Options................................125 6.4 Where to Obtain Codes used in this thesis....................................................................126 REFERENCES.......................................................................................................127 7

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