Boiler Operation Engineer Interview Question - 28
Q.How do you calculate the Turbine Efficiency ?
Ans.
Turbine efficiency is the ratio of heat out put to the heat input
Here, heat input is heat content in inlet steam and out put is power generation.
Actually, total power generation = Power generated on generator terminal/ (Gear box efficiency X Alternator efficiency).
What is Turbine heat rate ?
Turbine heat rate is the ratio of total heat required to generate unit power.
Turbine efficiency = 860 X 100/ Turbine heat rate
Thermal power plant turbine heat rate = Steam flow (Main steam enthalpy - Feed water enthalpy) / Power generation.
Co - generation Turbine heat rate
= (Steam Flow x Steam Enthalpy +Makeup Water flow x Its Enthalpy+ RC Flow x RC Enthalpy)-(Process -1 steam flow x its Enthalpy+ Process -2 steam flow x Its Enthalpy+ FW Flow x FW Enthalpy)) /Power Generation.
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