THERMAL SCIENCE

International Scientific Journal

Muhammad Abubaker

,

Hafiz Muhammad Ali

,

Fahad Noor

,

Muhammad Imran

,

Tehmina Ambreen

CONDENSATE RETENTION OF WATER-ETHANOL MIXTURE ON HORIZONTAL ENHANCED CONDENSING TUBES

ABSTRACT
Condensate retention has been found an important parameter for heat transfer on horizontal enhanced condensing tubes. In this research, five pin-fin (varying in circumferential pin spacing) and three integral-fin horizontal tubes are investigated for condensate retention angle (which is measured from the top of tooth to the fully flooded flank) using water-ethanol mixture. An attempt was made to find the optimum concentration of ethanol in water for maximum retention angle. Concentration of ethanol was varied in between 0.5% to 1.5% by weight. Data revealed the importance of integral-fin tube over pin-fin tube as significant increase in retention angle was observed for integral-fin tube ((having same longitudinal spacing, tooth thickness, tooth height, inner and outer diameter) while retention angle for pin-fin tubes remain unchanged. Optimum ethanol concentration was observed to be 0.75%.
KEYWORDS
condensate retention, Pin-fin and Integral-fin tubes, water-ethanol mixture, dropwise condensation, binary mixture
PAPER SUBMITTED: 2017-06-29
PAPER REVISED: 2017-11-03
PAPER ACCEPTED: 2017-11-05
PUBLISHED ONLINE: 2017-12-03
DOI REFERENCE: https://doi.org/10.2298/TSCI170629236A
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Issue 6, PAGES [3493 - 3500]
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Condensate retention of water-ethanol mixture on horizontal enhanced condensing tubes

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