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Interstage Pressures of a Multistage Compressor with Intercooling.

Helen Lugo-Méndez1, Teresa Lopez-Arenas1, Alejandro Torres-Aldaco2

  • 1Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana-Cuajimalpa, Av. Vasco de Quiroga 4871, Santa Fé, Cuajimalpa, Ciudad de México 05348, Mexico.

Entropy (Basel, Switzerland)
|April 3, 2021
PubMed
Summary

This study derives an analytical expression for multistage compressor interstage pressures based on minimum compression work. This method aids in estimating compressor stages and operational pressures when measurements are unavailable.

Keywords:
intercoolinginterstage pressuresmultistage compressors

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Area of Science:

  • Thermodynamics
  • Mechanical Engineering
  • Fluid Dynamics

Background:

  • Multistage compressors are vital in industrial processes.
  • Accurate interstage pressure prediction is crucial for efficiency.
  • Existing methods may not account for all operational variables.

Purpose of the Study:

  • To derive an analytical expression for interstage pressures in multistage compressors with intercooling.
  • To incorporate factors like gas properties, intercooler pressure drops, suction temperatures, and isentropic efficiencies.
  • To develop a tool for estimating the number of stages and interstage pressures.

Main Methods:

  • Utilized the criterion of minimum compression work.
  • Developed an analytical expression for interstage pressures.
  • Applied the expression to estimate compressor stage requirements.

Main Results:

  • An expression for interstage pressures was derived, considering key operational parameters.
  • The derived expression facilitates the estimation of the number of compression stages.
  • The method's applicability for predicting operational interstage pressures was evaluated.

Conclusions:

  • The derived analytical expression provides a robust method for calculating interstage pressures.
  • This approach enhances the design and operational analysis of multistage compressors.
  • The findings are particularly valuable for estimating pressures when direct measurements are absent.