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ISBN : 978-1-56700-478-6

Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017)
2017, December 27-30 , BITS Pilani, Hyderabad, India

DROPWISE CONDENSATION OF WATER VAPOR EXISTING IN MOIST AIR

Get access DOI: 10.1615/IHMTC-2017.2090
pages 1505-1510

Abstract

Condensation of water vapor present in moist air in form of drop occurs when the condensing surface is hydrophobic or superhydrophobic and the surface temperature is below than the dew point temperature. This process plays significant role in enhancing the overall water productivity for water harvesting via dewing. The aim of study is to enhance the condensation transport coefficient for efficient water harvesting in hot, arid and drought prone regions. An experimental setup is designed and fabricated to carry out the parametric study of moist air velocity, relative humidity and degree of sub-cooling on the condensation rate. The results show that the condensation rate increases with increase in relative humidity, moist air velocity and degree of sub-cooling. In addition, chemically etched condensing surface further improves the droplet shedding effect during condensation.
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