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2013/1/31 · The below formula has been used by some as a rough estimate of total steam cost: Total Steam Cost ($/MMBtu) = Fuel Cost ($/MMBtu) x 130% Calculating Unloaded Steam Costs For boilers, we've found this boiler steam cost calculator (Internet Explorer F *

Read MoreThe operational efficiency of a boiler is an expression of the percentage of heat energy generated from the heat energy input. It can be found using the following formula: (1) Heat output [kJ] = Mass of steam produced [kg] x (Specific enthalpy of steam - …

Read More2015/3/17 · Steam Energy Flow = Specific Enthalpy * Mass Flow [ Steam Energy Flow = 117,518 = 1,313.5 btu/lbm * 84.8 klb/hr] Step 2: Determine Feedwater Properties and Mass Flow The feedwater flow rate can be calculated from steam mass flow and blowdown rate:

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