Authors: A Kalendar T Galal A AlSaftawi M Zedan
Publish Date: 2011/09/01
Volume: 25, Issue: 8, Pages: 1969-
Abstract
Existing MSF systems experience severe mechanical difficulties due to fouling deposited inside the bore of the condenser tubes The idea of replacing smooth tubing with enhanced tubing is discussed for innovative design Performance analysis between enhanced and plain tubes is investigated experimentally using a simulated design test rig The study is performed for corrugated and smooth resemblance aluminumbrass tubes of 1100 mm length and 23 mm bore Pumping different coolants as steady transition/turbulent flow fresh water and authentic brine are conducted to simulate actual environmental conditions Three different flow velocities are examined 01 01645 and 02398 m/s Comparing results of the brine with that of fresh water shows the effects of fouling on significantly lowering values of overall heat transfer coefficient versus time The results confirm that the smooth tube has a greater fouling tendency than the corrugated tube The effect of fouling is reduced as flow speed increases and consequently the asymptotic value of overall heat transfer coefficient U increases Values of U for the enhanced tube are much higher than that of the smooth tube The highest difference occurs at velocity 02398 m/s by a factor of about 15 Overall by utilizing real brine the results proved that heat performance of the employed corrugated tube is superior to the plain over the studied time period 140 hrs and on the studied range of flow speedsAhmad Kalendar is an assistant professor in the Mechanical Engineering Dept College of Technological Studies Kuwait He has a BSc and MSc degrees in Mechanical Engineering from North Carolina State University USA He received his PhD degree in Mechanical Engineering from University of Wales Cardiff Wales UK in 2000 His research interests include the areas of desalination technology fouling in heat exchanger and coldstore designTarek Galal received his BS degree in Mechanical Engineering from An Shams University Cairo Egypt in 1973 his M Eng degree from McGill University Montreal Canada in 1982 and his PhD degree from FrancheComte Universite France in 1989 He is currently a lecturer at the Department of Mechanical Engineering Technology at the Public Authority for Applied Education Training in Kuwait His research interests are in the areas of heat transfer and solar energyMohamed G Zedan is an assistant professor in the Mechanical Engineering Dept College of Technological Studies Kuwait He was a Staff Engineer in the gas turbine engine department Textron Lycoming Stratford CT USA He was a Sr Research Engineer in the gas turbine engine department Allison Gas Turbine GMC IN USA He has a BSc degree in Mechanical Engineering from Cairo University Egypt He has a MSc and PhD degrees in Mechanical Engineering from University of Waterloo CanadaAbdelfattah Elsaftawy was a lecturer with the Mechanical Engineering Dept College of Technological Studies Kuwait He has a BSc degree in Mechanical Engineering from Cairo University Egypt 1968 He has a MSc in thermal power engineering from Cranfield Institute of Technology UK in 1979 and he received his PhD degrees in Mechanical Engineering from Cairo University Egypt in 1998 His research interest is in the area of thermal and fluid flow apparatus designs
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