The effect of air on condensation on a roped tube

✍ Scribed by J. Cunningham; A. Holmes

• Publisher: Elsevier Science
• Year: 1981
• Tongue: English
• Weight: 527 KB
• Volume: 38
• Category: Article
• ISSN: 0011-9164
• DOI: 10.1016/s0011-9164(00)86049-x

✦ Synopsis

With an increasing interest in the use of enhanced heat transfer surfaces being shown in connection with desalination, experiments have been carried out to compare the effect on different tubes of non-condensable gases. The tests were made on two roped aid one plain tube each tube having a nominal length and inside diameter of 690 nxn and 11 mm respectively. Cooling water velocities ranged from 0.8 m/s to 4.2 m/s and bulk air concentrations at inlet of up to 4.25% by weight were investigated.

It was found that although the effect of air on the condensation process was greater on the roped tubes at low cooling water velocities, at the velocities commonly associated with desalination plants there was little difference between the effect of non-condensables on roped and plain tubes.