The EVAL Project

The project aims to build a cooling solution based on a loop heat pipe (LHP) – a robust, miniaturised, two-phase heat transfer device, considered to be especially useful for the electronics, aviation and spacecraft industries.

The innovation of the EVAL cooling solution consists in combination of:

working fluids able to meet the bleed system valve cooling requirements and aeronautical standards;

Allatherm’s patented technology of evaporator-reservoir modular unit (ALTOM), which makes possible to create superior in thermal performance, coma-pact, lightweight, robust, reliable, easy-to-integrate and still cost-effective thermal management systems;

innovative technology of LHP charging on-site

The key advantages of the EVAL approach over the active two-phase cooling system:

Minimal weight no heavy components like pump

Compact and flexible design ALTOM multiple evaporator-reservoir-condenser design can be easily adapted to UHBR environment

High reliability confirmed by many applications

Zero power off-take 100% passive system

EVAL is funded by the Clean Sky 2 Joint Undertaking. The CS2 Topic Manager is Liebherr, the leading EU manufacturer of thermal management systems for aerospace field. After the project completion Liebherr will integrate EVAL demonstrator (to be supplied by the consortium) into a real UHBR engine demonstrator to launch further testing in “target environment” in the frame of the Large Passenger Aircraft IADP activities of the Clean Sky 2 JU.

The EVAL innovative passive cooling system will enable reliable and efficient long-term operation of the UHBR engine within the next generation of European passenger aircraft. With the demonstration of its solution, EVAL will contribute to the high-level impacts expected by the Clean Sky 2 Programme.