Cooling system for travelling wave tube of telecommunications satellite includes radiator and heat exchange fluid circuit to remove heat from travelling wave tubes

摘要

The cooling device comprises a radiator (15) thermally uncoupled from the satellite body, and placed to disperse heat by radiation into space. A heat exchange fluid loop (25) links a exchangers (34,33) on the collectors (28) to a cold exchanger (32) belonging to the radiator (15). The device provides cooling for travelling wave tubes (26) having a collector (28) preferably operating at high temperature and thermally insulated from the rest of the tube. The device comprises a radiator (15) thermally uncoupled from the satellite body, and placed in an orientation such that it disperses heat by radiation into space. A heat exchange fluid loop (25) links hot exchangers (34,33) thermally coupled to the collectors (28) and emitting units of the tubes (26) carried by the satellite, and a cold exchanger (32) belonging to the radiator (15). The fluid loop is monophase, and the fluid flow is controlled by a link (38,40) between the input and the output of the cold exchanger (32). The fluid loop may includes include at least one flexible section (50).