Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 09, 2021 - October 10, 2021
Heat transfer performance of aluminum and copper surfaces with fine tunnel structures are investigated experimentally. We measured heat transfer performance of 7 new tunnel surfaces (No.1~3, No.6~9). Fluorine-based refrigerant HFE-7000 was used as a working fluid. Absolute pressures used are 0.10MPa,0.14MPa,0.18MPa, respectively. New surface No.1 surface has the highest heat transfer performance among tested aluminum surfaces. Heat transfer is higher than 11 times of smooth surface and 2 times of the reference tunnel surface No.4 at 80kW/m2 of 0.14MPa. When the fin height is too high, the heat transfer performance is significantly decreased. When comparing the copper and aluminum surfaces, the heat transfer performance of copper is superior to aluminums.
