TY - JOUR
TI - Heat transfer modelling of two-phase bubbles swarm condensing in three - phase direct - contact condenser
AU - Mahood Hameed B
AU - Sharif Adel O
AU - Al-Ailbi Sami
AU - Hossini Ali
AU - Thorpe Rex B
JN - Thermal Science
PY - 2016
VL - 20
IS - 1
SP - 143
EP - 153
PT - Article
AB - 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.