[en] The growing computational capabilities of electronic systems on
aerospace platforms present new challenges for thermal management,
highlighting the need to rethink architectures such as two-phase mechanically
pumped loops (2PMPL). These systems, which rely on the latent heat of
vaporisation for heat acquisition and rejection, require careful selection of the
working fluid. In this context, where energy consumption and the reliability of the
pumping stage are closely tied to pressure losses within the loop, this study
examines the correlation between Figures of Merit (FoMs) and pressure losses,
derived from 1D simulations using the homogeneous model. The formulation
principles for existing FoMs are analysed, and a new FoM is proposed for fluid
selection in a single-loop 2PMPL configuration.
