Centrifugal Compressor – Required Adiabatic Horsepower

This application uses a compression unit that calculates a natural gas-fired turbine to turn a centrifugal compressor. The centrifugal compressor is like a large fan inside a case, which pumps the gas as the fan turns.
Size of the fan and speed within the case controls the pumping action.

PTLB Compressors 2.2_Intro.png
π»π‘ƒΒ βˆ’ Adiabatic Compressor Horsepower
π‘„Β βˆ’ Gas Flow Rate[MMSCFD]
𝑇1Β βˆ’ Suction Temperature[°𝑅]
𝑇2Β βˆ’ Discharge Temperature[°𝑅]
Z1Β βˆ’ Compressibility of Gas at Suction Conditions
Z2Β βˆ’ Compressibility of Gas at Discharge Conditions
π‘§π‘Žπ‘£π‘”Β βˆ’ Average Compressibility Factor
π‘˜ =Β βˆ’ Specific Heat Ratio
π‘›π‘ŽΒ βˆ’ Compressor Adiabatic (Isentropic)Efficiency
𝑃1Β βˆ’ Gas Suction Pressure[psia]
𝑃2Β βˆ’ Gas Discharge Pressure[psia]
CNGA/GPSA Compressibility Factor Approximation
PTLB Compressors 2.2_Intro 2.png
π‘Β βˆ’ Compressibility Factor
π‘ƒΒ βˆ’ Pressure(psi)
π‘‡π‘“Β βˆ’ Gas Flowing Temperature[°𝑅]
This approximation will produce results sufficiently accurate for preliminary calculations.
Brake Horsepower
PTLB Compressors 2.2_Intro 3.png
π‘›π‘šΒ βˆ’ Mechanical EfficencyΒ π‘›π‘šΒ = 0.95/0.98

 
 

Input Parameters

  1. To create a new case, click the β€œAdd Case” button
  2. Select the Centrifugal Compressor – Required Adiabatic Horsepower application from the Pipeline Compressor module.
  3. Enter Case Name, Location, Date and any necessary notes.
  4. Fill out all required fields.
  5. Make sure the values you are inputting are in the correct units.
  6. Click the CALCULATE button.

  • Base Pressure(psi)
  • Base Temperature(Β°F)
  • Suction Pressure(psi)
  • Suction Temperature(Β°F)
  • Discharge Pressure(psi)
  • Capacity/Required Flow Rate(ft/sec.)
  • Gas Specific Heat Ratio
  • Gas Specific Gravity (Relative to air)
  • Adiabatic Efficiency (0.75 – 0.79)
  • Mechanical Efficiency (0.95 – 0.98)
  • Z1 – Compressibility Factor at Suction Conditions
  • Z2 – Compressibility Factor at Discharge Conditions

PLTB Compressors 2.2_Input Rev_090120.png
 
 

Outputs/Reports

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

  • Discharge Temperature(Β°F)
  • Zavg – Average Compressibility Factor
  • Adiabatic Head (ft lbf/lbm)
  • Adiabatic GHP per Unit of the Flowrate(HP/MMSCFD)
  • GHP – Adiabatic Gas Horsepower(HP)
  • BHP – Adiabatic Brake Horsepower(HP)
  • ACFM – Actual Flow Rate for Sizing(ftΒ³/min)

PLTB Compressors 2.2_Output Rev_090120.png

Related Links

Pipeline HUB β€” User Resources

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  2. AC Mitigation PowerTool
  3. API Inspector's Toolbox
  4. Horizontal Directional Drilling PowerTool
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