EPSILON INGENIERIE

Their core work

EPSILON Ingénierie, part of the ALCEN group, is a Toulouse-based engineering firm specializing in thermal management and aerothermal simulation for the aerospace sector. They design, model, and test heat exchangers and ventilation systems for aircraft engines and nacelles, combining multi-physics simulation (thermomechanical, fluidic, CFD) with physical testing and demonstrator development. Their work spans the full cycle from material characterization and fatigue prediction to prototype integration, directly supporting next-generation aircraft propulsion systems.

What they specialise in

How they've shifted over time

EPSILON's early H2020 work (2019) centered on fundamental material characterization — fatigue testing, degradation laws, and multi-scale thermomechanical simulations for heat exchanger life prediction. By 2021, their focus shifted toward applied engineering solutions: passive actuators using shape memory alloys, heat pipe integration, and nacelle-level system design. Across their portfolio, there is also a clear emergence of sustainability concerns, with life cycle assessment and eco-design optimization appearing in the later projects.

EPSILON is moving from simulation-heavy characterization work toward integrated, sustainable thermal management solutions for next-generation aircraft engines — a direction aligned with Clean Aviation priorities.

How they like to work

EPSILON predominantly leads its projects, serving as coordinator in 2 of 3 H2020 efforts. With only 11 consortium partners across 3 countries, they operate in small, focused consortia rather than large multi-partner networks. This suggests a hands-on engineering firm that takes ownership of technical delivery rather than playing a supporting role in large-scale programs.

EPSILON has worked with 11 unique partners across 3 countries, indicating a compact, specialized network likely concentrated in the European aerospace corridor. The small partner count reflects their role in focused Clean Sky-type projects rather than broad collaborative programs.

What sets them apart

EPSILON bridges the gap between aerospace thermal simulation and physical demonstrator development — they don't just model heat exchangers, they predict their lifetime and build prototypes. Being part of the ALCEN group (a diversified technology holding) gives them industrial backing while maintaining the agility to coordinate EU research projects. Their Toulouse location places them at the heart of European aerospace, with direct relevance to Airbus supply chain needs.

Highlights from their portfolio

• DALI
  Their largest project (EUR 365K) and a coordinator role, combining multi-physics simulation with physical fatigue testing to predict aircraft heat exchanger lifetimes — a full demonstrator effort.
• PALOMA
  Innovative use of shape memory alloys and heat pipes for passive aircraft ventilation, targeting the emerging challenge of ultra-high bypass ratio engine thermal management.