Critical Heat Flux in Pool Boiling on a Vertical Heater

摘要

Critical heat flux during pool boiling on a wire or plate vertical heater has been measured employing water and refrigerant R113. The experiment was carried out using wires 0.5 to 2 mm in diameter and plates 5,7, and 30mm in width. The height of the heater ranges from 20 to 3000 mm and the pressurer were 1 and 2 bar for water and 1,2,3, and 4 bar for R113. The results show that in the cases of both wires and the plate 5 and 7 mm in width, a large coalesced bubble entirely surrounds the vertical heater and rises surrounding it, while for the plate with w=30 mm, a large bubble cannot surround and rises along its surface.