Main steam conditions
Where does the fuel energy go?
Steady-state rates. Fuel input is on the same heating-value basis as the specified boiler efficiency. Net generation subtracts pump shaft power (ideal motor); other auxiliaries are excluded.
Steam plant
Temperature–Entropy (T–s)
Property trends along the cycle
Illustrative cycle progress, not elapsed plant time: section widths are chosen for training, not actual residence times. Scrub or click the trend to move the water parcel.
Properties: IAPWS-IF97 regions 1, 2 and 4; saturation dome near the critical point uses region 3 with numerical density roots. Intermediate pump and turbine paths are illustrative quasi-equilibrium paths using the specified efficiency at each intermediate pressure; they are not actual equipment trajectories. Boiler and generator losses are included in the plant energy balance. No additional turbine mechanical or pump motor losses are modeled. Reference curves are restricted to 16 MPa and the supported IF97 property range; only the saturation boundary and quality lines extend to the critical point. Educational model, not for equipment design. IAPWS formulation.
Training model · IAPWS-IF97 steam properties · 100 kg/s · condenser 0.1 bar(a) · turbine 85% · pump 80% · boiler 85% · generator 98%. All calculations run locally in your browser.