BOILING HEAT TRANSFER OF CARBON DIOXIDE IN HORIZONTAL TUBES

摘要

In this study, an experimental rig for carbon dioxide was constructed for measurement of boiling heat transfer characteristics inside horizontal tubes. The test section is a horizontally placed smooth tube, of which inner diameter is 1mm, Experimental conditions are as following; evaporating temperature is 15°C, heat flux is between 9 and 36kW/m{sup}2, quality is from 0.1 to 0.9, mass flux is from 360 to 1440kg/m{sup}2s. The measurement results of boiling heat transfer and pressure drop in tubes are compared with those of fluorocarbons, which have been measured under the similar conditions.