Development Of A Supercritical Carbon Dioxide Brayton Cycle

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Development Of A Supercritical Carbon Dioxide Brayton Cycle ( development-of-supercritical-carbon-dioxide-brayton-cycle )

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i.e., helium, supercritical CO2, and nitrogen. However, molten coolants can transport heat with low pumping power requirement, which becomes very attractive without any consideration of material problems associated with molten coolants at high temperatures. Figure 3-15 shows the layout of the HYSYS simulation. In the primary side, stream 1 to 6 has Flibe as a coolant and in the secondary side, streams 7 through 21 has helium as a working fluid. The cycle efficiency from this simulation is 56%, which is much higher than helium-helium cycle or helium-CO2 cycle. The detailed operating conditions are summarized in Table 6. Similar calculations are being performed now and it will be reported in the next quarterly report. Table 3-7. Summary of HYSYS simulation with multiple reheats. Operating conditions Reactor Power 600 MW-thermal Configuration Indirect Mass flow of Flibe in the primary loop 1,189 kg/s Mass flow of helium in the secondary loop 295 kg/s Reactor Inlet, stream (6) 600C 0.1MPa (1 atm) Reactor Outlet, stream (1) 700C 0.1 MPa (1 atm) IHX Inlets (stream (2) to( 5)) 700C 0.1MPa (1 atm) HP Turbine Inlet/Outlet (8) / (9) 602C/ 525 C 7 MPa / 5.46 MPa MP Turbine Inlet/Outlet (10) / (11) 622C/ 525 C 5.46 MPa / 4 MPa LP Turbine Inlet/Outlet (12) / (13) 622C/ 525 C 4 MPa / 2.93 MPa Turbine Inlet/Outlet (14) / (15) 623C/ 525 C 2.92 MPa / 2.14 MPa Recuperator Inlet/Outlet 525 C / 94 C Compressor Inlet (17) 35C 2.5 MPa LP Compressor Inlet (18) 35C 3.24 MPa MP Compressor Inlet (19) 35C 4.2 MPa HP Compressor Inlet/Outlet (20/21) 35C/ 73 C 5.44 MPa/ 7.04 MPa Outlet from Recuperator, shell side (7) 5040C 7 MPa Cycle Efficiency 56 % 35

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