The invention is notably directed to an aircraft (10), which includes an aircraft structure (20), a thermal exchange
system, a
thermal insulation material (26), and fasteners (32, 35). The thermal exchange
system includes a fluid-based cooling circuit (70 - 73) and
heat exchanger tiles (25). The latter cover, at least partly, the aircraft structure. They may thus form the
skin of the aircraft. The fasteners (32, 35) secure the tiles (25) to the aircraft structure. Each tile of the
heat exchanger tiles embeds one or more fluidic channels (254), which are connected to the fluid-based cooling circuit, whereby the thermal exchange
system is adapted to actively cool the tiles, in operation. Remarkably, the
thermal insulation material (26) extends between the aircraft structure and the
heat exchanger tiles. The
thermal insulation material (26) is clamped on either side by the heat exchanger tiles (25) and by the aircraft structure (20), thanks to the fasteners (32, 35). The latter can for instance be bolted joints, which extend from central areas of the tiles. Some of the fasteners may embed sensors (40The invention is further directed to methods of operating such an aircraft. Such methods operate the fluid-based cooling circuit to circulate a
cooling fluid through the fluidic channels (254) of the heat exchanger tiles (25) to cool them down. The present methods may further harness
aerodynamic heating to help evaporate a liquid
coolant and form the
cooling fluid as a gas.