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The guaranteed heat rate, indicated on performance data table of power plant is calculated in accordance with

the following formula:

HR = (Qms x Hms - Qfw x Hfw + Qhrh x Hhrh - Qcrh x Hcrh - Qas x Has + Qmu x Hmu) x 3600 / W

HR = heat rate [kJ/kWh]

W = gross power output [kW]

Q = mass flow [kg/s]

H = enthalpy [kJ/kg]

Subscript:

ms = main steam

fw = boiler feedwater

hrh = hot reheat steam

crh = cold reheat steam

as = auxiliary steam extraction from turbine cycle for boiler users

mu = make up water at condenser

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