Ethylene Industry ›› 2025, Vol. 37 ›› Issue (3): 1-5.

• COMPRESSOR •     Next Articles

Calculation of Stagnation Pressure of Centrifugal Compressor Systems 

Wang Zhenwei   

  1. SINOPEC Engineering Incorporation, Beijing, P.C.100101
  • Received:2025-02-06 Revised:2025-04-10 Online:2025-09-25 Published:2025-09-28

Abstract:

The stagnation pressure of a centrifugal compressor system impacts the design of the compressor body?, ?auxiliary systems? (e.g., seals) and ?related process systems? (e.g., suction drums). Rigorous and accurate calculation formulas are derived based on thermodynamic theory. Several simplified formulas are developed. The errors of several calculation methods are compared and analyzed through calculations, and a simplest calculation method is recommended for the stagnation pressure of three key compressors in ethylene plants.

Key words: stagnation pressure; compressor, compression system, cracking gas compressor, refrigeration compressor