2.16. CryoFD was very fruitful in improving boiling heat transfer in the condenser/reboiler of Air Separation
Units. Apart from considerable advances achieved with porous surfaces and to restricting the depth of the LOX to
1m in the reboiler, the discovery of the falling film reboiling surface enabled a 10 to 100 fold increase in boiling
heat transfer to be achieved, with incredible simplicity.