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Pool boiling heat transfer with addition of surfactants
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School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China) |
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Abstract Based on thermal stability experiments of surfactants and aqueous surfactant solutions, pool boiling heat transfer experiments of different aqueous surfactant solutions, 99% sodium dodecyl sulfate (SDS), Triton X-100 and Triton X-114, were carried out under atmospheric pressure. The results show that surfactants and aqueous surfactant solutions have good thermal stability under experiment conditions.Compared with water, the optimal boiling heat transfer enhancement is achieved near the critical micelle concentrations (CMC) of surfactants. When concentration of each surfactant is normalized by its CMC, the degree of boiling heat transfer enhancement of anionic surfactant SDS is superior to that of nonionic surfactants of Triton X-100 or Triton X-114 for the same heat flux. However, the degrees of heat transfer enhancement of Triton X-100 and Triton X-114 depend on the normalized concentrations. The quantity of surfactant which is carried by boiling steam depends on species of surfactant, heat flux and surfactant concentration.
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