Coupled Heat and Mass Transfer in a Counter Flow Hollow Fiber Membrane Contactor for Air Humidification
Fluid flow and conjugate heat and mass transfer in a hollow fiber membrane contactor used for air humidification are investigated. The contactor is like a shell-and-tube heat exchanger where the water stream flows in the tube side, while the air stream flows in the shell side in a counter flow arrangement. To overcome the difficulties in a direct modeling of the whole contactor, a representative cell comprising of a single fiber, the water flowing inside the fiber and the air stream flowing outside the fiber, is considered. The air stream outside the fiber has an outer free surface. Further, the equations governing the fluid flow and heat and mass transfer in the two streams are combined together with the heat and mass diffusion equations in membranes. The conjugate problem is then solved to obtain the velocity, temperature and concentration distributions in the two fluids and in the membrane. The local and mean Nusselt and Sherwood numbers in the cell are then obtained and experimentally validated.
Heat transfer Mass transfer Hollow fiber membrane contactor Air humidification Free surface model
Si-Min Huang Li-Xia Pei Li-Zhi Zhang
Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Education Ministry, School of Ch Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Education Ministry, School of Ch
国际会议
4th International Symposium on Heat Transfer and Energy Conservation(第四届传热与节能国际研讨会 ISHTEC2012)
广州
英文
1-4
2012-01-06（万方平台首次上网日期，不代表论文的发表时间）