对阴离子表面活性剂SDS、非离子表面活性剂Triton X- 100及Triton X-114及其稀溶液进行了热稳定性试验和表面活性剂水溶液的池核沸腾试验.结果表明:试验工况下表面活性剂及其溶液的热稳定性较好；和水相比,表面活性剂质量分数在其临界胶束浓度(CMC)所对应的质量分数或其附近时换热强化效果最佳；基准质量分数(表面活性剂质量分数与相应临界胶束浓度下对应的质量分数比值)相同时,相同热通量下SDS的换热强化效果总体上要优于Triton X- 100和Triton X -114,相同电离特性的Triton X-100和Triton X-114换热强化效果与基准质量分数有关；溶液沸腾时蒸汽携带表面活性剂的数量与表面活性剂种类、热通量和原始溶液质量分数有关.%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.
展开▼
