Performance improvement of horizontal evaporator-condenser desalination units

✍ Scribed by S. Sideman; D. Moalem; R. Semiat

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 986 KB
• Volume: 21
• Category: Article
• ISSN: 0011-9164
• DOI: 10.1016/s0011-9164(00)80319-7

✦ Synopsis

An experimental work, aimed at appraising the authors' theoretical analysis of the simultaneous film evaporation outside and condensation inside horizontal tubes, is presented. The data indicate that for Re, > 150, the laminar flow model must be modified to account for ripples and waves caused by the drops falling down on the tubes. The effects of ReN and AT* on the overall transfer coefficient are very small. The effect of To is small, particularly in the presence of air. The predicted effects of utilizing non-circular conduits is validated, and a 20 % increase in the overall transfer coefficient was measured for elongated elliptical conduits.