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Plant utility calculator · Updated Sep 17, 2026
Estimate true steam production cost from boiler enthalpy rise and efficiency, fuel energy price, makeup-water/chemical cost, auxiliary electricity and condensate-return credit. Returns cost per tonne and per 1,000 lb plus annual spend.
Fuel cost/kg steam=(hsteam−hfeed)/(3600·η)×fuel cost/kWh; total adds water, chemicals and auxiliary electricity, then subtracts condensate credit.
With a 2,400 kJ/kg enthalpy rise and 85% boiler efficiency, each kg of steam needs about 0.784 kWh of fuel input before auxiliary and water costs.
Estimate true steam production cost from boiler enthalpy rise and efficiency, fuel energy price, makeup-water/chemical cost, auxiliary electricity and condensate-return credit. Returns cost per tonne and per 1,000 lb plus annual spend.
Use it for screening and comparison. Final plant selection should be checked against manufacturer data, actual operating profiles and applicable engineering requirements.
Plant utility calculations are sensitive to pressure basis, efficiency, duty cycle and operating cost assumptions. Showing them makes the result easier to audit and revise.