Feedwater Heater Heat Transfer

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Feedwater Heater Heat Transfer

• Richard Galati
• Brent Smith
• Justin Pierce

2
Overview

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

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The Feedwater Heater
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Overview

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

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Feedwater Heater
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Heat Transfer

• Finding Heat Transfer
• Variables Provided by Manufacturer
• Un - Stage Thermal Resistance
• An - Stage Area
• Log Mean Temperature Difference
• All temperature values provided from
  instrumentation on feedwater heater

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Heat Transfer

• Q for each stage is calculated
• De-Superheating
• Condensing
• Drain Cooling
• Qtot Qds Qc Qdc
• Results compared with projected data from
  manufacturer

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Conclusions

• Qtot, predicted 161.91x106 BTU/hr
• Qtot, actual 144.5x106 BTU/hr
• Difference 17.41x106 BTU/hr
• Why
• 20 years of use
• Increase of Flow Rate
• Other