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As the electrification of transport systems expand, the development of high-power high-efficiency electric motors is becoming essential. In order to ensure the integrity and the safety of E-vehicles, a rigorous thermal management is required. The subject of this study is to determine the thermal performances of a novel design pulsating heat pipes (PHP) designed to cool the stator of an e-motor. The device is partially filled up (38 %) with R1233Zd and is made of copper tubes. The novel design has 10 segments; each is composed of 3 sections evaporator, adiabatic and condenser regions and had two different cross section (rectangular and circular). The critical inner diameter (ID) was used in the evaporator (1,75 mm), and a significantly larger ID in the other regions, with two types of inner surfaces (grooved and smooth). The device was tested at different heat inputs (200 to 1000 W) and in various volumetric airflows. The study demonstrated the capacity of the PHP to dissipate high heat powers up to 1000 W while maintaining a thermal resistance lower than 70 K/kW and a temperature under 90 °C.
Halima Aziza, Riadh Boubaker, Safouene Ouenzerfi, Naoko Iwata, Vincent Dupont, Souad Harmand
Joint 22nd IHPC and 16th IHPS
Joint 22nd IHPC and 16th IHPS
