Abstract: A two-phase type heat transfer device (10) for heat sources operating at a wide temperature range. The heat transfer device (10) includes an evaporator (21) collecting heat from a heat source, a condenser (21) providing heat to a cold sink by a first working fluid passing through liquid and vapor transport lines (25, 27) that connect the evaporator (21) and the condenser (23). The evaporator (21) is arranged inside a saddle (31) configured for avoiding that the temperature of the first working fluid in the evaporator (21) is greater than its critical point. The invention also refers to aircraft ice protection systems using the heat transfer device (10).

Abstract: Thermal module (1) for use on a spacecraft to control thermal loads coming from a heat source (3) comprising a two-phase loop system (5) and a heat rejection system (13), the two-phase loop system (5) comprising a thermal collector (7), a heat flow regulator (10), a by-pass line (6) and a condenser (11), the condenser (11) and the heat rejection system (13) being thermally coupled, such that the heat flow regulator (10) of the two-phase loop system (5) redirects part of the thermal loads from the heat source (3) to the condenser (11), from which the heat rejection system (13) directs said thermal loads to a heat sink (14), the temperature of the heat source (3) being regulated by bypassing another part of the thermal loads back to the thermal collector (7) through the by-pass line (6) in a proportional manner, to avoid the heat source (3) overcooling, being the heat rejection system (13) designed based on the hottest possible conditions for the spacecraft mission.