The growing demand for innovative cooling technologies is critical for maintaining high-heat-flux devices within their thermal limits. This seminar will be divided into two parts, each highlighting a different cooling strategy.
The first part will explore technologies that utilize room-temperature fluids. In particular, findings from a systematic investigation of a two-phase heat transport device known as the pulsating heat pipe (PHP) will be presented. PHPs, which rely on phase-change heat transfer, are known for their efficiency in managing high heat fluxes. Results from theoretical, experimental, and numerical studies on the thermo-hydrodynamic characteristics and performance optimization of PHPs will be presented. Additionally, the similarities and potential differences in the underlying physics between room-temperature PHPs and cryogenic PHPs will be briefly discussed.
The second part of the seminar will introduce a new cooling approach employing cryogenic fluids. While cryogens are essential across various advanced technologies, their extremely low boiling points often lead to vigorous phase-change behavior when introduced into room-temperature systems, causing substantial cryogen consumption. This highlights the importance of strategies aimed at improving cryogen utilization efficiency. In this context, a technology developed to enhance cryogen efficiency will be presented, supported by both experimental and numerical investigations.
Department of Mechanical Engineering Advanced Thermal Energy Lab. Ulsan National Institute of Science and Technology