Compactness factors for rolled, stacked-screen regenerative heat exchangers
✍ Scribed by Tim Murphy; W.Jerry Bowman
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 265 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0011-2275
No coin nor oath required. For personal study only.
✦ Synopsis
The objective for the current research was to determine how the heat transfer and pressure drop characteristics changed in a stacked, wire-screen regenerative heat exchanger (regenerator), if the screens which were used to construct the matrix were rolled to decrease their thickness. More of the rolled screens would fit into a regenerator with a reduction in gas volume in the regenerator. During the course of the research, an improved method for determining the heat transfer characteristics of a porous medium regenerator was developed. The results show that the compactness factor (j H /f) was adversely affected by rolling. Flattening the screens by 15%, 30%, or 50%, did not improve the heat transfer rate to the matrix, but it did increase the total pressure drop. Rolling the screens caused a decrease in both wetted surface area and pore size. The heat transfer which is proportioned to the wetted surface area was reduced. The pressure drop, which is strongly dependent on pore size, increased. Rolling the screens also reduced the effectiveness of the regenerator.