On the role of saturation temperature in thermal management through two-phase mechanically pumped loop

The impact of commercial aviation on the volume of polluting emissions is a problem
that has become more relevant over the years, from initiatives at a personal level such as
abstaining from the use of aircraft, to approaches at a government level with the dissent via taxes in some countries, there have been various ways of facing a problem whose solution may possibly go through the path of technological development. In today's world, the growing demand for power in the transition to electric aviation systems brings together the need to improve the thermal management systems associated with their correct operation. It is in this context where flow boiling cooling technologies ha
ve demonstrated their potential for thermal management. This two-phase solution uses the latent heat of vaporisation as a resource in the extraction of heat, with low
requirements in mass flow and near-isothermal operation, resulting in a low temperature difference between hot source and cold sink even for long distances where the addition of pumping stages becomes necessary. In the overall design scheme of a two-phase cooling circuit, adjusting the saturation temperature or mass flow of the coolant are control possibilities in the face of changing conditions of the heat transfer environment. This work presents a set of five criteria to establish a saturation temperature setpoint under steady state conditions. Two application examples are presented, and the results are compared with case studies of two-phase mechanically pumped loop (2PMPL) from the aerospace industry.