Abstract
The absorption of water vapor in aqueous solutions of lithium bromide is modeled for a falling-film, vertical-tube absorber. The model is based on the solution of three ordinary differential equations to calculate axial solution concentration and temperature distributions and coolant temperature distribution. The heat and mass transfer coefficients employed in the equations are extracted from the literature, incorporating recent information on wavy-laminar flows. Under certain conditions, the numerical solution exhibits instabilities in the entrance region of the absorber tube, which are corrected by the introduction of a dampening factor incorporating relevant thermophysical properties. The usefulness of the model for generating absorber performance charts is demonstrated.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 69-80 |
| Number of pages | 12 |
| Journal | ASHRAE Transactions |
| Volume | 99 |
| Issue number | pt 2 |
| State | Published - Dec 1 1993 |
| Event | Proceedings of the 1993 Annual Meeting of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. - Denver, CO, USA Duration: Jun 27 1993 → Jun 30 1993 |
All Science Journal Classification (ASJC) codes
- Building and Construction
- Mechanical Engineering