A thermosyphon loop, designed for the thermal management of a large Medium voltage power converter 5 MW overall, corresponding to 2.4 kW load per cooling unit) is presented. The device mainly made an evaporator, condenser and reservoir connected with plastic liquid vapor lines. Novec 649 (3M) has been chosen as working fluid due environmental electrical concerns. model loop described, its predi...

Based on Fluent software, a mathematical model of thermosyphon pump is established and numerical simulation carried out to study the influence riser tube length, diameter immersion ratio liquid lifting capacity efficiency. The results showed that: volume increased with increase ratio, whereas efficiency trend increasing followed by decreasing. highest for 340mm long, 6mm achieved when 0.35. Wit...