Abstract
Pool boiling heat transfer experiments were performed for small heat transfer surfaces; the diameter D = 20 mm, 3.0 mm, 2.0 mm and 1.0 mm at 0.1 MPa by using ethanol. The overall trend of the boiling was similar to what had been observed for a usual size heat transfer surface. As the diameter of the heat transfer surface became small, the heat transfer coefficient and also the critical heat flux were greatly enhanced.
