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11rankine_pract

# 11rankine_pract - Practical Rankine cycle define some units...

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Practical Rankine cycle define some units kJ := 10 3 J this file calculates irreversible Rankine cycle with following parameters: condenser 40 deg C kN := 10 3 N kPa := 10 3 Pa steam pressure 30 bars (3 MPa) superheat 460 deg_C MPa := 10 6 Pa bar := 0.1MPa file derived from Rankine class example.mcd differences/assumptions: 1-2 adiabatic irreversible compression 2-3 heat transfer - small pressure loss - ignore 3-4 adiabatic irreversible expansion 4-1 heat transfer to saturated liquid - small subcooling - ignored states are the same 1 - vacuum; saturated liquid 2 - sub cooled liquid at boiler pressure 3 - superheated vapor 4 - vapor + liquid @ saturation temperature and pressure xx s designates reversible (isentropic) process where different refer to T-s and H-s diagrams at end of file state 1: condenser outlet same as reversible 3 Table 1 or Table A.1.1 T 1 := 40 p 1 := 7.384kPa v f_1 := 0.0010078 m v 1 := v f_1 kg kJ kJ kJ kJ s f_1 := 0.5725 s fg_1 := 7.6845 h f_1 := 167.57 h fg_1 := 2406.7 kg kg kg K kg K s 1 := s f_1 h 1 := h f_1 Boiler Turbine 2 - subcooled liquid at boiler pressure 3 -Superheated vapor 3 MPa, 460 C W t 4 - vapor + liquid at saturation temperature and pressure Condenser 1 - vacuum saturated liquid 40 C Pump

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