Description
Surface characteristics of a finned tube heat exchanger were examined to help predict the contact geometry between metal surfaces. Primary characteristics evaluated were the surface roughness and waviness and the material hardness. A scanning electron microscope was used to observe the surface topography of the fins as well as to examine the contact between the aluminum fin and the copper tube.
For a given fin number, surface roughness increased as the expansion increased. Tests also revealed that only a portion of the fin collar was actually in contact with the tube. These results were subsequently used to develop a mathematical model for predicting the heat transfer between the fin and tube.
Citation: ASHRAE Transactions, 1985, vol. 91, pt. 1A, Chicago, IL
Product Details
- Published:
- 1985
- Number of Pages:
- 11
- File Size:
- 1 file , 3.9 MB
- Product Code(s):
- D-CH-85-2885
