A final test activity was carried out to complete the verification of the Environmental Control System (ECS) performances by experimentally reproducing the thermal hydraulic behaviour of the Environmental Control & Life Support Subsystem (ECLSS) section integrated in the overall Module, expected on analytical basis.
A previous test campaign (called Columbus ECS PFM Test) carried out in EADS-Bremen in spring 2003 and described in paper number 2004-01-2425 showed some contradictory data concerning the air loop behaviour. These incoherent test results were related to the environmental and geometrical cabin loop conditions during the on-ground 1g test and to improper position of the sensor measuring the cabin temperature.
For this reason a partial repetition of the test has been performed.
In particular, this experimental campaign was focused on the verification of the cabin air temperature control, as a consequence of the Temperature Control Valve (TCV) movement.
The ECS Re-Test Data have been analytically evaluated and a correlation activity has been performed with the Integrated Overall Thermal Mathematical Model (IOTMM).
Based on the good correlation obtained between the measured and the calculated heat load balances and TCV positions, it has been possible to judge the IOTMM section able to correctly reproduce the thermal hydraulic behaviour of the air loop expected in flight conditions.