Fundamento
Pump work
For an approximately incompressible liquid, the ideal enthalpy rise is vΔP.
\(w_p=v_f(P_2-P_1)/\eta_p\)
ThermoLab · Chapter 10
Rankine steam power cycles
Computes work, heat, efficiency and exhaust quality on the T-s dome for water.
Motor listo
Engineering results
NOT RUNDetailed calculation reportEquations · substitution · verification
Run the calculation to generate the report.
Engineering directory
13 linked modules on a single calculation base
Open any tool without losing your chosen unit system. Each page works on its own and keeps its navigation, report and export.
01
Appendices A-1 to A-28Universal property interpolator
→02Chapters 1 and 2Pressure, temperature and general energy balance
→03Chapter 3Pure substances and equations of state
→04Chapter 4Energy integrals for closed systems
→05Chapter 5Control volumes and the first law
→06Chapters 6 and 7Second law, Carnot and entropy
→07Chapter 8Exergy, destruction and second-law efficiency
→08Chapter 9Gas power cycles
→09Chapter 10Rankine steam power cycles
→10Chapter 11Refrigeration cycles
→11Chapters 12 and 13Gas mixtures and psychrometrics
→12Chapters 14 and 15Combustion and adiabatic flame temperature
→13Chapters 16 and 17Chemical equilibrium and compressible flow
→Engineering framework
Theory, equations and conditions of use
The Rankine cycle pumps liquid, adds heat at high pressure, expands vapour and condenses the exhaust. Properties are read relative to the saturation dome.
Fundamento
Actual turbine
Isentropic efficiency relates the actual enthalpy drop to the ideal one.
\(\eta_t=(h_3-h_4)/(h_3-h_{4s})\)
Fundamento
Thermal efficiency
Net work subtracts the pump consumption from the turbine output.
\(\eta_{th}=(w_t-w_p)/q_{in}\)
Base documentalÇengel & Boles, 7th edition · SI appendices A-1 to A-28
USCS conversionA-1E to A-27E, via exact factors from the SI base
AlcancePreliminary design, teaching and independent verification
Engineering FAQ
Preguntas frecuentes
Why does exhaust quality matter?+
High moisture erodes the last-stage blades; the allowable limit depends on the manufacturer.
What does reheat achieve?+
It raises the exhaust quality and can improve the specific work.
What changes with regeneration?+
Part of the steam preheats the feedwater and reduces the external heat required.