Supercritical Carbon Dioxide Cycle Analysis

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

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0.0011d0 !Inside tube (m) 0.008d0 !Shell (m) 0.000d0 !Pipe (m) 0 !0 indicates no baffles, 1 indicates baffles Figure D.1: The SoSaT input file, matching the steam generator of the JSFR. The data for the enhanced tubes is never read, since enhanced tubes cannot be used for steam. The code outputs information about the length, heat transfer area, heat exchanger effectiveness, and the fluid temperatures at inlet and outlet in output.txt. The output file appears as shown in Figure D.2. Shell and Tube Design Data Number of Baffles Number of Tubes 0 7220 Heat Exchanger Effectiveness Heat Exchanger length (m) Hot fluid Inlet Temperature (deg C) Hot fluid Outlet Temperature (deg C) Cold fluid Inlet Temperature (deg C) Cold fluid Outlet Temperature (deg C) Hot side delta P (kPa) Cold side delata P (kPa) Heat transferred (MW) Heat transfer area (m^2) Outlet Steam Superheat (deg C) 0.324 23.530 520.350 336.145 240.000 498.002 10.280 14.292 1765.168 10140.470 135.719 Figure D.2: The SoSaT output file The results produced by SoSaT for the JSFR steam generator are in agreement with the published design. The heat transfer area of the JSFR steam generator is 12,500 m3, which agrees with the SoSaT calculated value of 10,140 m3 very well after the customary 20 % margin is included. For a new user designing a heat exchanger, probably the most interesting outputs will be the fluid temperatures and the dimensions of the heat exchanger. Pressure drops, if high, will eliminate some designs from consideration. A designer should keep in mind that pressure drops calculated in SoSaT are only for the tubes. Plena and piping are not considered and these pressure drops will be considerable for most situations. For comparison purposes, the total heat 149

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