Heat Transfer Coefficient Distributions in an Experimental Kettle Reboiler Thin Slice

Flow velocities in an experimental kettle reboiler determined by particle image velocimetry

“…The pressure drop and heat transfer data have been reported elsewhere [1,8,9,17]. Preliminary observation was that the presence of vapour bubbles carried downward with the recirculating liquid ( Fig.…”

“…The momentum imparted by the separation vortex, and the bundle profile at the bottom in the vicinity of the short columns, increased the force balancing the pressure drop due to flow up the columns. This increased the flowrate [1].…”

“…The recirculation rate, m recirc , was predicted by a 1D model [4,1] of the bundle. The value of G min for which the sum of the gravitational, frictional and momentum pressure drops balanced the liquid head at the side of the bundle was determined making the following assumptions:…”

“…Burnside et al [1] developed a scheme (model A) to include these effects. Model A used video evidence to determine at what row level lateral flow first occurred in individual columns and what was the effective liquid-vapour interface height between bundle and shell.…”

“…The tubes were in 17 rows in a 25.4 mm square pitch configuration. Static pressure tappings were disposed in the shell within and without the confines of the bundle [1,9]. The experimental rig flow circuit is shown in Fig.…”