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Plant Engineering Calculator

Boiler Feedwater Temperature Savings Calculator — Fuel & Cost Reduction

Quantify boiler fuel energy avoided when feedwater temperature increases at the same steam production rate.

Inputs

Results

Temperature gain 20.0 K
Boiler duty avoided 348.8 kW
Fuel input avoided 410.4 kW
Annual fuel energy avoided 2462353 kWh

Formula

Q=m·Cp(T2−T1)/3600; fuel input saved=Q/η.

Worked example

Raising 15,000 kg/h feedwater by 20 K saves about 349 kW of boiler output duty, or more fuel input after efficiency correction.

Assumptions & limits

  • Assumes steam output and other boiler losses remain unchanged.
  • Use measured overall efficiency for economic screening.

FAQs

What does this Boiler Feedwater Temperature Savings Calculator calculate?

Quantify boiler fuel energy avoided when feedwater temperature increases at the same steam production rate.

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