• Vol 7, No 7 (2016)
  • Mechanical Engineering

The Behavior of Lewis Number in Finned Tube Cooling Coils under Highly Moist Inlet Air Conditions

Teerachai Howongsakun, Somnuk Theerakulpisut, Purimpat Sujumnongtokul, Pattayagorn Palasan


Publish at : 30 Dec 2016 - 00:00
IJtech : IJtech Vol 7, No 7 (2016)
DOI : https://doi.org/10.14716/ijtech.v7i7.4654

Cite this article as:
Howongsakun, T.., Theerakulpisut, S.., Sujumnongtokul, P.., Palasan, P.., 2016. The Behavior of Lewis Number in Finned Tube Cooling Coils under Highly Moist Inlet Air Conditions. International Journal of Technology. Volume 7(7), pp.1253-1259
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Teerachai Howongsakun Department of Mechanical Engineering, Faculty of Engineering, Khon Kaen University, 123 Mittrapab Rd., Muang, Khon Kaen, 40002, Thailand
Somnuk Theerakulpisut Department of Mechanical Engineering, Faculty of Engineering, Khon Kaen University, 123 Mittrapab Rd., Muang, Khon Kaen, 40002, Thailand
Purimpat Sujumnongtokul Department of Mechanical Engineering, Faculty of Engineering, Khon Kaen University, 123 Mittrapab Rd., Muang, Khon Kaen, 40002, Thailand
Pattayagorn Palasan Department of Mechanical Engineering, Faculty of Engineering, Khon Kaen University, 123 Mittrapab Rd., Muang, Khon Kaen, 40002, Thailand
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Abstract

The objective of this research was to study the effects of highly moist inlet air conditions such as temperature, relative humidity, and frontal air velocity on the value of the Lewis number (Le) in the cooling and dehumidifying process of air. A finned tube cooling coil was tested under ranges of temperature, relative humidity and frontal velocity. It was found that the Lewis number (Le) varied within the range of 0.92-1.62 and that the increase in inlet air relative humidity tends to decrease the Lewis number (Le). Based on the experimental, a correlation for predicting the Lewis number (Le) was also established in this article. The correlation has the mean absolute error (MAE) of 3.04% and covers 98.07% of the data where a discrepancy within ± 10%.


Cooling coils; Dehumidifying process; Lewis number; Moist air