Two per cent heat rate improvement of a 275,000 kw unit results from efficient 2-stage steam air preheaters heating to 190 F with 5 F terminal temperature differences. Condenser heat rejection and turbine leaving losses are reduced substantially. Flue-gas losses are not increased. Air heater cleanliness is improved. Maintenance is reduced. Annual coal savings after fixed charges are one half of the net added investment.
Issue Section:
Research Papers
Topics:
Economics ,
Steam,
Heat,
Coal,
Condensers (steam plant),
Flue gases,
Heating,
Maintenance,
Temperature,
Turbines
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