Temperature Rise Due To Pumping

Introduction

No pump is perfect with 100% efficiency. Energy lost in friction and hydraulic losses transforms to heat โ€“ heating up the fluid transported through the pump and the piping. PLTB calculates this temperature rise.

Throttling the discharge valve will result in a temperature increase. Reduced efficiency of pumps results in temperature increases. : t_y = \frac{H \left( \frac{1}{n} – 1 \right)}{780 c_p} [\text{\textdegree}F]

t_y = \frac{H \left( \frac{1}{n} - 1 \right)}{780 c_p} [\text{\textdegree}F]

Where:
๐‘ก๐‘ฆ โˆ’ Temperature Rise due to Pumping (โ„‰)
๐ป โˆ’ Total Head (ft)
๐‘› โˆ’ Pump Efficiency
๐‘๐‘ โˆ’ Specific Heat (Btulbโ„โ„‰)

Case Guide

Part 1: Create Case

  1. Select the Temperature Rise Due to Pumping application from the Pump Module
  2. To create a new case, click the โ€œAdd Caseโ€ button
  3. Enter Case Name, Location, Date and any necessary notes.
  4. Fill out all required Parameters.
  5. Make sure the values you are inputting are in the correct units.
  6. Click the CALCULATE button to overview results.

Input Parameters

  • Total Head (ft)
  • Liquid Specific Heat (Btu/lb หšF)
  • Pump Efficiency (0-1)

Part 2: Outputs/Reports

  1. If you need to modify an input parameter, click the CALCULATE button after the change.
  2. To SAVE, fill out all required case details then click the SAVE button.
  3. To rename an existing file, click the SAVE As button. Provide all case info then click SAVE.
  4. To generate a REPORT, click the REPORT button.
  5. The user may export the Case/Report by clicking the Export to Excel icon.
  6. To delete a case, click the DELETE icon near the top of the widget.

Results

  • Temperature Rise (หšF)

References

  • ASME B31.4 โ€“ 1998 Edition โ€œPipeline Transportation Systems for Liquid Hydrocarbons and other Liquidsโ€, Art. 404.1
  • API 1117 โ€“ Movement of In-Service Pipelines
  • API 5L, API 5LS and API 5LX โ€“ Specification of Pipe Grade
  • ASTM โ€“ Various โ€“ Weld Joint Factor
  • CFR Code Part 192
  • MMS Regulations
  • USDA-SCS Modified (Permissible Velocity of Water and Soil Erodibility)
  • Pipeline Rules of Thumb Handbook

Updated on December 26, 2023

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