Feedwater Heater Heat Transfer Richard Galati Brent Smith Justin Pierce

Overview Intermountain Power Plant Intermountain Power Plant – Provides power to Los Angeles – 2 Generator Units  950MW output each  1900MW Total Output – Proposed 3 rd unit will make it the 13 th largest generating station in the US

The Feedwater Heater

Overview Feedwater Heater Feedwater Heater – Condenses steam – Preheats water before entering boiler – Increases efficiency and total BTU output

Feedwater Heater

Heat Transfer Finding Heat Transfer Finding Heat Transfer – Variables Provided by Manufacturer  U n - Stage Thermal Resistance  A n - Stage Area Log Mean Temperature Difference Log Mean Temperature Difference All temperature values provided from instrumentation on feedwater heater All temperature values provided from instrumentation on feedwater heater

Q for each stage is calculated Q for each stage is calculated – De-Superheating – Condensing – Drain Cooling Q tot = Q ds + Q c + Q dc Q tot = Q ds + Q c + Q dc Results compared with projected data from manufacturer Results compared with projected data from manufacturer Heat Transfer

Conclusions Q tot, predicted = x10 6 BTU/hr Q tot, predicted = x10 6 BTU/hr Q tot, actual = 144.5x10 6 BTU/hr Q tot, actual = 144.5x10 6 BTU/hr Difference = 17.41x10 6 BTU/hr Difference = 17.41x10 6 BTU/hr Why: Why: – 20 years of use – Increase of Flow Rate – Other…