三角錐ピラミッド型伝熱面の低圧プール沸騰特性

抄録

Triangular pyramid type heat transfer surfaces were made as new type of heat transfer surface, and its low pressure pool boiling cooling performance was investigated experimentally. The saturation pressure cited was 15 kPa. Working fluid was pure water, and its liquid height was 25 mm. Two types of triangular pyramid type heat transfer surfaces were used, one with a pyramid size of 2.5 mm and the other with a pyramid size of 5.0 mm. The heat transfer performance of the triangular pyramidal surface with size of 2.5mm was better than that of 5.0 mm. The heat transfer coefficient was about 2.0 times higher with size of 2.5 mm and 1.8 times higher with size of 5.0 mm compared with the smooth surface. When comparing with the square pyramid types, the triangular pyramid types had a higher heat transfer coefficient than the square pyramid types.