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Type: Journal article
Title: Enhancement of nucleate pool boiling heat transfer to dilute binary mixtures using endothermic chemical reactions around the smoothed horizontal cylinder
Author: Sarafraz, M.
Peyghambarzadeh, S.
Alavifazel, S.
Citation: Heat and Mass Transfer, 2012; 48(10):1755-1765
Publisher: Springer Verlag
Issue Date: 2012
ISSN: 0947-7411
Statement of
M. M. Sarafraz, S. M. Peyghambarzadeh, S. A. Alavifazel
Abstract: Experimental studies on enhancing the pool boiling heat transfer coefficient of binary dilute mixtures of water/glycerol, water/MEG (Mono-ethylene glycol) and water/DEG (di-ethylene glycol) have been carried out. Some particular endothermic chemical reactions related to ammonium salts were used to enhance the pool boiling heat transfer coefficient, simultaneously with occurrence of pool boiling heat transfer. Accordingly, 100 g of Ammonium nitrate, ammonium perborate and Ammonium sulfate were selected to dissolve into mixtures. High and extreme solution enthalpies of each of these ammonium salt powders are employed to reduce the surface temperature around the horizontal cylinder locally. Results demonstrated that presence of ammonium salts into the mixtures deteriorates the surface temperature of cylinder and as the result, higher pool boiling heat transfer coefficient is reported for tested solutions. Results are also reported and compared for different ammonium salts to find the influence of inducing different enthalpies of solution on pool boiling heat transfer coefficient. Obtained results also indicated that presence of endothermic reaction besides the pool boiling heat transfer enhances the heat transfer coefficients in comparison with nucleate pool boiling phenomenon solely.
Rights: © Springer-Verlag 2012
RMID: 0030038145
DOI: 10.1007/s00231-012-1019-5
Appears in Collections:Mechanical Engineering publications

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