Two-phase nanofluid-based thermal management systems for LED cooling

International Conference "Structural and Phase Transformations in Materials: Theory, Computer Modelling and Experiment"

材料科学;计算机科学

Kiseev, V.^1 ; Aminev, D.^1 ; Sazhin, O.^1

Ural Federal University, Lenin av. 51, Ekaterinburg

620000, Russia^1

关键词: Cooling devices;    Degradation process;    Heat transfer process;    Hydrodynamic limit;    Maximum heat flux;    Thermal control systems;    Thermal management systems;    Two phase systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/192/1/012020/pdf
DOI  :  10.1088/1757-899X/192/1/012020

来源: IOP

【 摘 要 】

This research focuses on two-phase thermal control systems, namely loop thermosyphons (LTS) filled with nanofluids, and their use as LED cooling devices. The behavior of the fluid in the thermosyphons and the mechanisms explaining the possible impact of nanoparticles on thermal properties of the working fluid as well as the processes in the LTS are addressed. Nanoparticle distribution in the nanofluid, methods of preparation of nanofluids and nanofluid degradation processes (aging) are studied. The results are obtained from a set of experiments on thermosyphon characteristics depending on the thermophysical properties of the working fluid, filling volume, geometry and materials of radiators. The impact of nanofluids on heat-transfer process occurring inside thermosyphon is also studied. Results indicate strong influence of nanoparticles on the thermal properties of the thermosyphons, with up to 20% increase of the heat transfer coefficient. Additionally, a method of calculating the hydrodynamic limit of the LTS is proposed, which allows for estimation of the maximum heat flux that can be transferred by means of the LTS. Possible ways for further improvement of the model are proposed. The nanofluids are shown to be effective means of enhancing two-phase systems of thermal management.