Download PDFOpen PDF in browserImaging and Analysis of Condensation in Presence of Noncondensable Gases – Effect of Surface WettabilityEasyChair Preprint no. 24304 pages•Date: January 20, 2020AbstractThis study provides an insight to the analysis of time averaged Heat Transfer Coefficient(HTC), water collection rate, pattern of drop-size distribution, employing IR thermography and specialized imaging software, under different surface wettanilityconditions. We perform an experimental analysis under free convection, with two different sets of surface conditions (hydrophilic and hydrophobic) on a smooth, vertical glass surface, exposed to a quiescent environmenteontaininghimid air. Experimental results showed that the HTC (time averaged) for hydrophobic surface is greater than that on the hydrophilic surface under same set of test conditions. Hydrophobic surface yielded faster water collection rate compared to the hydrophilic one. Distribution of droplet population over the range of 0.1 – 1 mm diameter is seen to have a decreasing trend with increasing drop size, while droplets smaller than 0.1mm diameter covered the major fraction of the heat transfer surface area. Keyphrases: Dropsize distribution, DWC, FWC, HTC, NCG
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