Performance Summary
Results appear here after submission. This estimator uses simplified saturated-steam relationships for fast engineering screening.
Calculator Inputs
Use the form below to estimate steam-side energy, steam volume, shaft output, and operating intensity from a water-like feed liquid.
Plotly Graph
The chart shows estimated shaft power against boiler pressure while holding the other current inputs constant.
Example Data Table
These example cases help compare low, medium, and higher pressure operating points.
| Case | Volume (L) | Boiler Pressure (bar) | Outlet Temp (°C) | Steam Energy (kJ) | Shaft Power (kW) | Steam Rate (kg/hr) | SSC (kg/kWh) |
|---|
Formula Used
Mass = Volume × Density
Sensible Heat = Mass × Cp × (Saturation Temperature − Inlet Temperature)
Latent Heat = Mass × hfg
Here hfg is estimated from the saturation temperature trend.
Superheat Heat = Mass × Cps × (Outlet Temperature − Saturation Temperature)
Steam Energy = Sensible Heat + Latent Heat + Superheat Heat
Source Energy = Steam Energy ÷ Boiler Efficiency
Shaft Energy = Steam Energy × Boiler Efficiency × Adjusted Cycle Efficiency × Mechanical Efficiency ÷ Safety Factor
Shaft Power (kW) = Shaft Energy ÷ Batch Time
This page uses fast screening correlations. It is ideal for comparison studies, early sizing, and educational reviews. Final design should still use proper steam tables and detailed cycle analysis.
How to Use This Calculator
- Enter the feed liquid volume and density.
- Enter the initial liquid temperature.
- Set the boiler and exhaust absolute pressures.
- Enter the steam outlet temperature.
- Add boiler, cycle, and mechanical efficiencies.
- Set the expansion ratio and batch time.
- Choose a safety factor for conservative estimates.
- Press calculate to view results, graph, and exports.
The result panel appears above the form. Use the export buttons to save a CSV summary or a PDF report for documentation.
Frequently Asked Questions
1) What does this calculator estimate?
It estimates feed mass, heating duty, steam-side energy, steam volume, shaft energy, shaft power, steam rate, and specific steam consumption for a water-like steam engine setup.
2) Is this a replacement for detailed steam tables?
No. It is a fast screening tool. It helps early decisions and comparisons. Final engineering work should use validated property tables and detailed thermodynamic modeling.
3) Why does the calculator ask for liquid density?
Density converts liquid volume into mass. Mass drives sensible heat, latent heat, steam volume, and batch rate estimates.
4) Why is outlet temperature important?
If outlet temperature exceeds saturation temperature, the calculator adds superheat energy. That raises total steam-side energy and can improve estimated work potential.
5) What is cycle conversion efficiency?
It represents how much steam thermal energy becomes indicated work before mechanical losses. It bundles expansion quality, valve timing, leakage, and other cycle effects.
6) Why does exhaust pressure change the result?
Higher exhaust pressure reduces the usable pressure drop. That lowers effective expansion quality and decreases estimated shaft output.
7) Can I use liquids other than water?
You can compare water-like liquids, but results become less reliable as properties differ. For non-water fluids, use fluid-specific heat capacities and phase-change data.
8) What is specific steam consumption?
Specific steam consumption shows how many kilograms of steam are needed per kilowatt-hour of output. Lower values indicate better steam-use effectiveness.
Engineering Notes
- Pressures are absolute pressures.
- Density defaults to water-like liquid behavior.
- Saturation temperature is approximated from pressure.
- Latent heat decreases as pressure increases.
- The chart updates after each calculation.