Experimental study of falling film evaporation on horizontal tube bundle for a desalination unit Online publication date: Wed, 30-Jun-2010
by El-Sayed R. Negeed, Mostafa M. Awad
International Journal of Nuclear Desalination (IJND), Vol. 4, No. 1, 2010
Abstract: The objective of the present research is to experimentally study the effect of the tube configuration and also the effect of the operating conditions on the evaporation rate of the horizontal tube bundle. An experimental test loop was installed and the water spray on a horizontal tube bundle with three nozzles of fan-jet flat nozzle type. The results show that evaporation rate and Nusselt number are increased by increasing the tube surface temperature, increasing the tube's outer diameter, decreasing the evaporation pressure and decreasing the inlet liquid sub-cooling. The falling distance has little influence on the evaporation rate. Constructing water collector around the bottom-heated tubes enhances the evaporation rate. Also, increasing the gap between the water collector and the outer tube surface, from 0.0 to 4.0 mm, results in increasing the evaporation rate. An empirical correlation has been deduced describing the relation between the average heat transfer coefficient and the affecting operating parameters.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Nuclear Desalination (IJND):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook