WSCycle - Rankine Cycle Calc

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About this app

WSCycle – Water Steam Cycle Calculator – calculates a simple water-steam cycle based on the Clausius–Rankine process: boiler, turbine, condenser and pump in one schematic. Net power and thermal efficiency at a glance, steam properties from IAPWS-IF97. Built for engineering estimates, teaching and quick “what if” checks on the go.

WHO IT’S FOR
• Engineers in power plant and energy engineering
• Students and lecturers who want to explore the Rankine cycle interactively

HOW IT WORKS
• The cycle schematic is the interface: tap a value on boiler, turbine, condenser or pump
• Adjust parameters with sliders
• After “Apply” the full cycle recalculates immediately
• Mass flow is a global cycle quantity above the schematic

RESULTS
• Net power and thermal efficiency
• Boiler and condenser heat rates
• Wet steam at the turbine exhaust is highlighted with steam quality x
• h–s diagram with process path and a coarse grid
• Copy results for notes or email

FEATURES
• Extended efficiencies: isentropic turbine and pump, mechanical, generator, pump motor, boiler
• Free, ad-free, fully offline – no account, no telemetry
• English and German interface
• Slider input (no direct numeric entry)

UNITS
• Pressure: bar absolute (condenser up to 0.9 bar a)
• Temperature: °C
• Mass flow: kg/s
• Power and heat: kW
• Efficiencies: %
• Enthalpy: kJ/kg · Entropy: kJ/(kg·K)

ACCURACY
Steam properties use the same IAPWS-IF97 model as the steam turbine calculator STuC. Developed by a project engineer with more than 15 years of experience in turbomachinery and thermodynamic cycles. Provided in good faith but without warranty of correctness or completeness. Always verify critical calculations with your own methods and professional judgment.

Run your next steam cycle through WSCycle. Feedback is welcome at myengineering@posteo.de.
Rankine cycle calculator for water and steam with IAPWS-IF97, boiler to pump
Updated on
Sep 6, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
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  • No data collected
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What’s new

Initial release.

• Simple water-steam cycle (Clausius–Rankine)
• Steam properties as in STuC (IAPWS-IF97)
• Slider-based input (free)
• h–s diagram and copy results