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Journal of Enhanced Heat Transfer
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ISSN Imprimir: 1065-5131
ISSN En Línea: 1026-5511

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v17.i4.10
pages 293-300

Surfactant Effects on Critical and Minimum Heat Flux

Joshua M. Borsari
University of Massachusetts Dartmouth, USA
Peter Friedman
University of Massachusetts Dartmouth

SINOPSIS

Experiments were conducted to determine the effect of Surfynol 465 surfactant on critical heat flux (CHF) and minimum heat flux (MHF) during voltage-controlled pool boiling at saturation temperature, using a small platinum wire connected to a controllable DC power supply. Bulk surfactant concentrations ranged from 0.001% to 0.405% as determined by measuring the equilibrium surface tension with a tensiometer using the du Nouy ring method. Results indicate that CHF increases and MHF decreases with increasing surfactant concentration, although the effect on both CHF and MHF is small relative to typical boiling heat transfer uncertainty. For example, at 0.405% Surfynol 465 CHF increases by 15% and MHF decreases by 34%, while accepted boiling heat transfer data uncertainty is about 50%. Results of the current study are compared with accepted correlations as well as previous studies that used different surfactants.


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