Il termosifone bifase impiegato quale dissipatore di calore per diodi e tiristori di potenza

This work deals with a two-phase thermosyphon applied to cooling power electronic components. The difference between a typical heat sink with thermal gradient and one with a two-phase thermosyphon is shown. On the basis of general design criteria, a cooling device of this type for a 1. 0 kw thyristor has been realized. Heat transfer performance of this dissipator has been experimentally determined: the thermal resistance of about 0. 025 degree C/W, obtained by using this radiator with forced convection in air, is very similar to that offered by the devices employing water in forced convection