Ethylene Compression & Hypercompression for LDPE UnitsMTE/ETHCO-E

Who should attend?

  • This course provides a comprehensive understanding of ethylene compression related to compressors technology, operation and efficiency.
Audience :
  • Engineers and technical staff (operation, maintenance and/or engineering) interested or involved in ethylene compression.

Level : Advanced

Course Content


      • Ideal gas equation and implementation; isentropic compression; mass and volume capacity. Supercritical gas behavior.
      • Practical compression laws: discharge temperature, power of compression.
      • Pressure-enthalpy diagram for ethylene: for primary compressors and hypercompressors.
      • Main limitations: risks of condensation, overheating, decomposition, grease deposits.
      • Case studies: ethylene compression from 1 to 3000 bar.

      • Indicator diagram for ideal and actual cases.
      • Influence of process temperatures and pressures.
      • Dead volume: impact on the intake of the machine.
      • Capacity control: different methods.
      • Power, efficiency.
      • Behavior of multistage reciprocating compressors.
      • Typical troubleshooting.
      • Operation: start-up and shutdown difficulties.
      • Cases studies: industrial ethylene compression, troubleshooting.

      • Compression ratio limitation due to axial loads on the crankshaft.
      • Interstage pressure control, risk of rods overbendings or plunger/seals breaks.
      • Discharge temperature limitation due to decomposition and oligomer deposits.
      • Lubrication operation and survey: crankshaft, oil seal and cooling. Criticity of the oil type.
      • Machine safety - PROGNOST™ type monitoring: axial vibrations, rod drop, oil temperatures and pressures, process temperatures and pressures.
      • Typical defaults, solutions and diagnosis.
      • Cases studies: various cases of troubleshooting.

      • Main components: frame, cylinders, piston, piston rings, piston rod, crankhead, crankshaft, distance pieces, valves, rod seals.
      • Auxiliaries: pulsation dampeners, crankshaft, seals and cylinder lubrication systems, cooling systems, safety devices.
      • Capacity control technology: main components (unloaders, clearance pockets).
      • Application: various compressor parts demonstrations.

      • Main differences with classical reciprocating compressors.
      • Hypercompressor description: valves, cylinders, seals.
      • Auxiliaries:
      • Construction and survey.
      • Crankshaft lubrication.
      • Rod seal lubrication.
      • Oil seal and cooling.
      • Drains.

Learning Objectives

  • Upon completion of the course, the participants will be able to:
  • master the technology and operation of ethylene compressors,
  • understand the basic design in relation to ethylene compression operating conditions,
  • monitor and optimize the performance of compressors,
  • identify most common failure modes and corrective measures.

Ways & Means

  • Study of actual cases based on industrial situations.
  • Various illustrations of actual systems.
  • Display of components of compressors.