- Author
-
Yashar, D. A.
|
Domanski, P. A.
|
Cho, H. H.
- Title
- Measurement of Air-Velocity Profiles for Finned-Tube Heat Exchangers Using Particle Image Velocimetry.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
Chosun Univ., Gwangju 501-753, Korea
- Report
-
2195,
- Book or Conf
- International Refrigeration and Air-Conditioning Conference. Proceedings. July 14-17, 2008,
West Lafayette, IN,
1-8 p.,
2008
- Keywords
-
heat exchangers
|
air velocity
|
tubes
|
velocity distribution
|
ducts
|
air flow
|
velocity profiles
|
installing
|
air conditioning
- Identifiers
- Particle Image Velocimetry (PIV); air maldistribution; air velocity profile
- Abstract
- The performance of a finned tube heat exchanger is strongly affected by the velocity distribution of the air that passes through it. The air velocity distribution for finned-tube heat exchangers has gone largely undocumented because it is difficult to measure accurately. In this study, the air velocity distribution upstream of three heat exchangers installed in a horizontal duct is examined; a vertically oriented single-slab coil, a single-slab coil placed at an angle of 65º to the duct wall, and a two-slab A-Shaped coil with a 34º apex angle. The data was taken using a non-intrusive, laser based technique called Particle Image Velocimetry (PIV). The measurement results show that the air inlet velocity profile is strongly influenced by the heat exchanger's design and application.