Feedwater Heater Heat Feedwater Heater Heat TransferTransfer

Richard GalatiRichard GalatiBrent SmithBrent SmithJustin PierceJustin Pierce

OverviewOverview Intermountain Power PlantIntermountain Power Plant

– Provides power to Los AngelesProvides power to Los Angeles– 2 Generator Units2 Generator Units

950MW output each950MW output each 1900MW Total Output1900MW Total Output

– Proposed 3Proposed 3rdrd unit will make it the 13 unit will make it the 13thth largest generating station in the USlargest generating station in the US

The Feedwater HeaterThe Feedwater Heater

OverviewOverview Feedwater HeaterFeedwater Heater

– Condenses steamCondenses steam– Preheats water before Preheats water before

entering boilerentering boiler– Increases efficiency and total Increases efficiency and total

BTU outputBTU output

Feedwater HeaterFeedwater Heater

Heat TransferHeat Transfer Finding Heat TransferFinding Heat Transfer

– Variables Provided by ManufacturerVariables Provided by Manufacturer UUn n - Stage Thermal Resistance - Stage Thermal Resistance AAn n - Stage Area - Stage Area

Log Mean Temperature DifferenceLog Mean Temperature Difference

All temperature values provided from All temperature values provided from instrumentation on feedwater heaterinstrumentation on feedwater heater

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Q for each stage is calculatedQ for each stage is calculated– De-SuperheatingDe-Superheating– CondensingCondensing– Drain CoolingDrain Cooling

QQtottot = Q = Qds ds + Q+ Qcc + Q + Qdcdc Results compared with projected Results compared with projected

data from manufacturerdata from manufacturer

Heat TransferHeat Transfer

ConclusionsConclusions QQtot, predicted tot, predicted = 161.91x10= 161.91x1066 BTU/hr BTU/hr QQtot, actualtot, actual = 144.5x10 = 144.5x1066 BTU/hr BTU/hr Difference = 17.41x10Difference = 17.41x1066 BTU/hr BTU/hr Why:Why:

– 20 years of use20 years of use– Increase of Flow RateIncrease of Flow Rate– Other…Other…