Published 8 issues per year
ISSN Print: 1065-5131
ISSN Online: 1563-5074
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Compound Augmentation of Pool Boiling on Three Selected Commercial Tubes
ABSTRACT
This paper will present results of an experimental study in which the Electrohydrodynamic (EHD) technique was utilized to provide compound enhancement of pool boiling heat transfer on three commercially available tubes. The tubes tested were: a low-fin 19 fins per inch, a modified high-fin 52 fins per inch, and a mechanically formed re-entrant cavity type. All tubes tested had a length of 63.5 mm (2.5″) and an outer diameter of 19 mm (3/4″). Five different electrode designs were tested, each over a predetermined heat flux and saturation temperature. The enhanced boiling mechanism in each case and a comparison of results for the three tubes are described. It was found that for the electrodes and heat fluxes tested, the specially designed (modified) high-fin tube yielded the highest enhancement amongst the three, with a nearly three-fold increase in the heat transfer coefficient. In the worst case, the EHD power consumption was less than 0.4% of the total heat transfer rate in the test section.
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Liu Yongqi, Li Ruiyang, Wang Fagang, Yu Hongling, The effect of electrode polarity on EHD enhancement of boiling heat transfer in a vertical tube, Experimental Thermal and Fluid Science, 29, 5, 2005. Crossref
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Sathyabhama A., Dinesh Athul, Augmentation of heat transfer coefficient in pool boiling using compound enhancement techniques, Applied Thermal Engineering, 119, 2017. Crossref
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Saha Sujoy Kumar, Ranjan Hrishiraj, Emani Madhu Sruthi, Bharti Anand Kumar, Enhancement of Two-Phase Flow Using EHD Technique, in Electric Fields, Additives and Simultaneous Heat and Mass Transfer in Heat Transfer Enhancement, 2020. Crossref