Effect of Bulk Temperature on the Evaporation of a Nitrogen Drop in Different Immiscible Liquids

Cryogenic fluids such as liquid nitrogen can be used to produce power with negligible tailpipe emissions. In this work, quantitative evaluations of evaporation rates of a nitrogen droplet immersed into different immiscible liquids maintained at different bulk temperatures were carried out by accurately tracking the three-dimensional evaporation process using a high-speed backlight imaging system. A comparison of the evaporation rates measured by the surrounding bubble growth and heat transfer rates at different bulk temperatures has been made for a droplet evaporating in 2-propanol, methanol, n-pentane and n-hexane.