HEAT TRANSFER MODELLING OF TWO-PHASE BUBBLES SWARM CONDENSING IN THREE - PHASE DIRECT - CONTACT CONDENSER
 作者： Hameed B. Mahood,  Adel O. Sharif,  Sami Al-Ailbi,  Ali Hossini,  Rex B. Thorpe 刊名： Thermal Science, 2016, Vol.20 (1) 来源数据库： Society for Thermal Engineers of Serbia DOI： 10.2298/TSCI130219015M 关键词： direct contact heat transfer;  direct contact condenser;  cell model;  two-phase bubble swarm;  heat transfer coefficient;  two-phase bubbles size; 原始语种摘要： An analytical model for the convective heat transfer coefficient and the two-phase bubble size of a three-phase direct contact heat exchanger was developed. Until the present, there has only been a theoretical model available that deals with a single two-phase bubble and a bubble train condensation in an immiscible liquid. However, to understand the actual heat transfer process within the three-phase direct contact condenser, characteristic models are required. A quasi - steady energy equation in a spherical coordinate system with a potential flow assumption and a cell model configuration has been simplified and solved analytically. The convective heat transfer in terms of Nu number has been derived, and it was found to be a function to Pe number and a system void fraction. In addition,... the two-phase bubble size relates to the system void fraction and has been developed by solving a simple energy balance equation and using the derived convective heat transfer coefficient expression. Furthermore, the model correlates well with previous experimental data and theoretical results.

• convective　对聊
• transfer　转换
• condenser　聚光器
• exchanger　交换器
• condensation　冷凝
• bubble　磁泡
• coefficient　系数
• analytically　分析上
• understand　理解
• phase　相位