packageAirCycle

Information

This example package illustrates, step by step, several configurations of an air-cycle refrigeration system based on the reverse Joule–Brayton cycle, as commonly used in aircraft Environmental Control Systems (ECS). The models are built using idealized state-change components, in particular Adiabatic and Isobaric processes. The cycle consists of four fundamental processes through which the working fluid (air) passes:

• Compression in a compressor: adiabatic process with a specified isentropic efficiency
• Heat rejection in a heat exchanger: isobaric cooling process
• Expansion in a turbine to produce work: adiabatic process with a specified isentropic efficiency
• Heat supply from the environment: isobaric heating process, artificially closing the thermodynamic loop

Contents

Revisions

• 2026, by Raphael Gebhart (raphael.gebhart@dlr.de):
  Initial version.