2021-06-232021-06-237/12/2021ICES-2021-56https://hdl.handle.net/2346/87070Sa�l Campo, Ib�rica del Espacio S.AJes�s �lvarez, Ib�rica del Espacio S.AAndrei Kulakov, Ib�rica del Espacio S.AFrancisco Romera, Ib�rica del Espacio S.A�scar Lara, Ib�rica del Espacio S.AAlejandro Torres, Ib�rica del Espacio S.AICES201: Two-Phase Thermal Control TechnologyThe 50th International Conference on Environmental Systems was held virtually on 12 July 2021 through 14 July 2021.Two-phase mechanically pumped loops have been identified as the potential solution for the heat management of high-powered platforms, such as next generation telecommunications satellites. The proposed concept Mechanically Pumped Advanced Control Loop (M-ACL) combines the advantages of a two-phase modular thermal control system and a mechanically pumped loop. In single-phase fluid loops temperature rise in the fluid and flow rate are directly proportional to the required heat transfer rate. High cooling loads lead to a large temperature rise and high pump power. For more effective thermal transport, the single-phase loop can be replaced by a two-phase one. This allows employing the latent heat of vaporization to significantly reduce flow rates, decrease temperature gradients, and increase heat transfer coefficients. M-ACL concept has been defined after an extensive literature and patents review. It is based on the multi-evaporator, multi-condenser Advanced Control Loop (ACL) concept, which means an integrate solution for the complete thermal control of the platform. The implementation of a mechanical pump in the system means an important increase of the heat transport capability that depends on the pump pressure rise characteristic. A trade-off has been performed to define main mechanical pump and M-ACL features. Additionally, a M-ACL engineering model has been designed based on a NACPA pump from RealTechnologie AG. In this study, the detailed design is presented as well as simulation results using a thermo-hydraulic model developed in EcosimPro simulation tool.application/pdfengAdvanced Control LoopHeat PipeLoop Heat PipePumpTwo-PhaseHigh PowerAmmoniaModularMultiple evaporatorsMultiple condensersPresentation