摘要
本文采用极限扩散电流技术与传热测定相结合的方法，区分了对流与薄层蒸发对水平管束沸腾传热增强的贡献。试验结果表明，薄层蒸发传热的相对贡献随热负荷或操作压力的增大而降低，而对流传热的相对贡献则随热负荷或操作压力的增大呈增加趋势。管所处位置愈高，其薄层蒸发传热增强的相对贡献愈显著。
ontributions of convection and microlayer evaporation to the enhancement of heat transfer are distinguished for boiling heat transfer outside a horizontal tube bundle by employing the limiting diffusion current technique combined with simultaneous heat transfer measurementsThe experimental results show that the relative contribution of convection to boiling heat transfer outside a tube bundle increases with increasing heat flux and/or operating pressure,and the relative contribution of microlayer evaporation to heat transfer increases with decreasing heat flux and/or operating pressureThe higher the tubes are positioned,the larger will be the relative contribution of microlayer evaporation to boiling heat transfer outside a tube bundle
出处
《石油化工》
CAS
CSCD
北大核心
1998年第7期503-506,共4页
Petrochemical Technology
关键词
水平管束
沸腾
对流
薄层蒸发
再沸器
horizontal tube bundle,boiling,heat transfer enhancement,convection,microlayer evaporation
