Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 12, 2019 - October 13, 2019
To reduce the weirght of thermosiphon, we focus on the aluminum heat transfer surface for saturated pool boiling. Considering the matching of aluminum surface with working fluid, fluorine refrigerant HFE7000 is used as a working fluid. And, we have used two types of heat transfer surface (smooth surface and curl-skive fin surface). Absolute pressures cited are 0.10MPa, 0.12MPa, 0.14MPa, 0.16MPa, respectively. As a result, under high pressure, boiling curve shows high performance at lower heat flux area compared with that of atmospheric pressure, regardless of type of heat transfer surface. And, under 0.10MPa with heat flux of 120kW/m2, degree of superheat of curl-skive fin surface is about 0.5times compared with that of smooth surface. Furthermore, under 0.16MPa with heat flux of 120kW/m2, degree of superheat of curl-skive fin surface is about 0.4times compared with that of smooth surface.
