New cooling concepts for avionics and associated electronics, LuFo IV (EFFESYS)



Simulation of the avionics space. Impact of environmental conditions on avionics ventilation and cases of failure related to temperature distribution.



  • Reproduction of the racks using heating foils
  • Reproduction of the ventilation system
  • Installation of the measurement instrumentation
  • Determination and assessment of the impact of environmental conditions on avionics ventilation
  • Examination of local and global temperature distribution failures in the avionics space
  • Examination and determination of local and global flow velocities in the avionics space in connection with cases of failure, to validate CFD data



In case of failure of the mechanical ventilation components, a modification of the design would allow as-yet unused heat sinks to be utilized. Heat pipes, for instance, might be an option for cooling the racks. They could transfer heat to the cold fuselage surface.

A passive combination, i.e. using thermal lifts and highly heat-conducting materials, could prolong the functionality of avionics components in case of systems failure.

A precise analysis of air bypasses and their impact can help identify further improvement potential, as the heat capacity of the avionics space itself obviously has not yet been fully tapped.


Funding agency

The project was funded by the German Federal Ministry for Economic Affairs and Energy (BMWi) under ref. no. FKZ: 20Y0803I.