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Steam Condenser Performance — online

Is your condenser vacuum where it should be, why not, and what does the difference 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 steam condenser performance calculator does

Terminal temperature difference, overall U and cleanliness factor of a surface condenser, the back-pressure you should be getting, and the turbine power and money lost to the excess.

  • Heat balance and temperatures. Cooling-water and steam duty with closure shown, saturation temperature, TTD, LMTD and condensate subcooling.
  • Cleanliness factor. Overall U and cleanliness against a clean-tube U estimated from tube material, gauge and water velocity, or against your own design value.
  • Expected back-pressure. What the vacuum should be for your cooling water and load, and the excess over it.
  • Air in-leakage indicators. Air-vapour depression at the off-take, air partial pressure and subcooling, each with a typical limit.
  • Cost of the excess. Turbine power lost per kPa, energy per year and its value at your price.
  • What-if tables. Cooling water inlet temperature and flow (net of pump power), cleanliness and plugged tubes.

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 steam condenser 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 Steam Condenser Performance Excel workbook and was checked cell by cell against the Excel file.