Transient Characteristics of a Two-Phase Thermosyphon Loop for Cooling Telecommunication Outdoor Cabinets

In this paper, experimental investigations of a two-phase thermosyphon loop are presented in order to keep telecommunication equipments temperature below 55°C. The experimental setup consists of a thermosyphon loop containing an evaporator and a condenser connected by two flexible tubes. Tests are performed firstly in transient state using the thermosyphon loop prototype inside telecommunication cabinet. The n-pentane is used as the working fluid. Firstly, transient thermal characteristics of the thermosyphon loop are measured. In the other way, the thermosyphon loop is tested for different power input up to 450W. Operating temperatures of the telecommunication equipments cooled with forced air convection and two-phase thermosyphon loop are compared.