2012 Fiscal Year Final Research Report

New type two phase loop applying spontaneous condensate drop movement in phase change of binary mixture

Research Project

Project/Area Number	23656147
Research Category	Grant-in-Aid for Challenging Exploratory Research
Allocation Type	Multi-year Fund
Research Field	Thermal engineering
Research Institution	Yokohama National University
Principal Investigator	UTAKA Yoshio 横浜国立大学, 大学院・工学研究院, 教授 (50114856)
Co-Investigator(Kenkyū-buntansha)	CHIN Shigou 横浜国立大学, 大学院・工学研究院, 研究教員 (60611275)
Project Period (FY)	2011 – 2012
Keywords	熱伝達 / マランゴニ凝縮 / 自発液滴移動 / 二相流体ループ / 水-エタノール
Research Abstract	The objective of the study is to realize theheat transfer device of wickless two phase fluid loop applying the spontaneous condensate drop movement with the temperature distribution on the heat transfer surface in the vapor-liquid phase change system. The binary mixture of water and ethanol was enclosed in the apparatus as a working fluid. The horizontal arrangement of heat transfer surface was adopted to reduce the effect of gravitational force. As a result, it was shown that the realization of wickless heat pipe was possible by applying the spontaneous condensate drop movement in the water-ethanol binary mixture system with temperature gradient of heat transfer surface.Itwas shown the enough transportation rate of heat.