抄録
Bubble-actuated circulating heat pipe, BACH, is one of new types of heat pipe, utilizing buoyancy force of vapor bubbles generated at bubble-generation part for liquid circulation. This research aims to develop top-heat type of the BACH consisting of heated section, cooled section and intermediate cooled section. The bubble buoyancy force acts only at between the heated section and the intermediate cooled section, realizing liquid circulation for heat transport from the heated section to the cooled section. Characteristics of heat transport and internal flow of the BACH were investigated by experimental measurements and model calculations. The working fluid was water or HFE-7100. As a result, heat transport rate of the top-heat BACH is affected by several parameters, especially by temperature difference between heated section and cooled section, 〓T_w,hc, temperature difference between heated section and intermediate cooled section, 〓T_w,hc, and upflow pipe length, L_1.
