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Gas Turbine Performance — online

Is your gas turbine delivering what it should on a hot day, and what does the gap cost?

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Sheet

Yellow cells are inputs; orange cells are choices; blue cells choose the unit. Select or hover over an input to see its help in the box below the toolbar. The sheet is the same as the Excel tool (USD 49) — the Guide, method and references are in the Excel file.

Input help: select an input to see what it means and which units it takes.

What this gas turbine performance calculator does

Heat rate, efficiency, exhaust flow and temperature of a simple-cycle gas turbine from plant readings, corrected to ISO conditions, with the yearly cost of degradation and an inlet air cooling what-if.

  • Heat rate and efficiency. LHV and HHV heat rate, thermal efficiency, specific fuel consumption and where the fuel heat goes.
  • Fuel from a library. Pipeline natural gas, lean gas, hydrogen-rich refinery gas, or your own gas analysis and heating value.
  • Exhaust from a heat and mass balance. Air flow, exhaust flow, temperature and composition, with a thermocouple cross-check that flags measurement problems.
  • Corrected to ISO conditions. Output and heat rate at 15 °C, 101.325 kPa, 60 % RH, with generic coefficients or your maker curve points.
  • Cost of degradation. Output shortfall, extra fuel, extra CO₂ and lost sales per year against new-and-clean or guarantee values.
  • Inlet cooling what-if. Output at other ambient temperatures and an evaporative cooler: effectiveness, water used, value per year.

How it was checked

Every result and message cell of the online tool was compared with the Excel workbook recalculated independently, at the default inputs and at four sets of randomly changed inputs, with the displayed text identical. The method and sources are those of the Excel tool and its Guide.

Related

Questions

Is the gas turbine performance calculator free?

You can enter and check all your data free. The full results, findings and printable sheet are unlocked with a 3-run pack (USD 9), a monthly subscription to all online tools (USD 15) or a yearly one (USD 99).

Are the results the same as the Excel tool?

Yes. The online tool runs the formulas of the Gas Turbine Performance Excel workbook and was checked cell by cell against the Excel file.