Exergy Losses Calculation for a 125 MW Combined Power Plant


Theoretical exergy analysis is carried out for different components of acombined power plant which consists of a gas turbine unit, waste heat recoveryboiler without extra fuel consumption and steam turbine unit. The resultspinpoint that more exergy losses occurred in the gas turbine combustionchamber. Its reached 33% of the consumed fuel exergy while the exergy lossesin other plant components are between 1% - 5% of the consumed fuel exergy.This paper also considered the effect of the pressure ratio, maximumtemperature, boiler pressure and ambient temperature on the exergy losses in theplant, there are a clear effects in the exergy losses when changing pressure ratio,maximum temperature and boiler pressure.