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Plant Engineering Calculator

Steam Desuperheating Water Calculator — Spray Water Flow & Outlet Steam

Estimate spray-water flow for steam desuperheating from a transparent steady-state energy balance.

Inputs

Results

Spray water 1050.4 kg/h
Outlet total flow 11050.4 kg/h
Water/steam ratio 10.50 %
Removed steam enthalpy rate 694.4 kW

Formula

mw=ms(hin−hout)/(hout−hw).

Worked example

10,000 kg/h steam dropping from 3,050 to 2,800 kJ/kg with 420 kJ/kg spray water needs about 1,050 kg/h water.

Assumptions & limits

  • Enter enthalpies from a validated steam-property source at actual pressure.
  • Assumes adiabatic mixing with no separator loss or external heat transfer.

FAQs

What does this Steam Desuperheating Water Calculator calculate?

Estimate spray-water flow for steam desuperheating from a transparent steady-state energy balance.

Which inputs matter most?

Use measured operating data where possible and keep pressure, temperature, flow, efficiency and tariff inputs on the stated basis. Intermediate outputs make the calculation auditable.

Can I use this for final equipment selection?

Use it for engineering screening and scenario comparison. Confirm final selections against OEM curves, steam/property tables, applicable codes and project design conditions.

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Last updated: 2026-09-17