School of Engineering Department of Mechanical and Aerospace Engineering 168 Analysis and Optimization of Novel Ionocaloric Cycles for Cooling Applications Supervisor: ZHENG Qiye / MAE Student: CHEN Jung-chi / AE Course: UROP 1000, Summer This report presents an analysis and optimization of novel ionocaloric cycles for cooling applications, focusing on the potential of eco-friendly solid-state materials. The study investigates various phase change materials (PCMs) and their ability to dissolve sodium iodide, with particular emphasis on ethylene carbonate and DMSO due to their favorable melting points and solubility characteristics. The report also explores the electrodialysis process used for ion separation within the ionocaloric cycle, highlighting the effects of material choice on the system's efficiency. This research aims to contribute to the development of sustainable cooling and energy storage technologies by optimizing the materials and processes involved in ionocaloric systems. Thermal Management of High Power Electronics Supervisor: ZHOU Yanguang / MAE Student: SAM Siu Chuen / MEGBM Course: UROP 1000, Summer This study focuses on the development of thermal management in high-power-density electronics using βgallium oxide microstructures. The ultrawide-bandgap semiconductor β-Ga2O3 has high potential for developing next-generation electrical devices. However, the self-heating issue caused by the low thermal conductivity of β-Ga2O3 has largely limited such development. This study aims to visualise the self-heating issue and find practical solutions. This report mainly focuses on the material advantages and disadvantages of β-Ga2O3 microstructures, as well as the possibility and effectiveness of interfacial engineering between βGa2O3 and highly thermal conductive substrates like AlN, 4H-SiC, and diamond in reducing the self-heating issue.
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