Heat transfer in tube bundles of heat exchangers with flow baffles induced forced mixing
Thermal analysis of shell-and-tube heat exchangers is being investigated through geometric modeling of the unit configuration in addition to considering the heat transfer processes taking place within the tube bundle. The governing equations that characterize the heat transfer from the shell side fluid to the tube side fluid across the heat transfer tubewalls are indicated. The equations account for the heat transfer due to molecular conduction, turbulent thermal diffusion, and forced fluid mixing among various shell side fluid channels. The analysis, though general in principle, is being applied to the Clinch River Breeder Reactor Plant-Intermediate Heat Exchanger, which utilizes flow baffles appropriately designed for induced forced fluid mixing in the tube bundle. The results of the analysis are presented in terms of the fluid and tube wall temperature distributions of a non-baffled and baffled tube bundle geometry. The former case yields axial flow in the main bundle region while the latter is associated with axial/cross flow in the bundle. The radial components of the axial/cross flow yield the necessary fluid mixing that results in reducing the thermal unbalance among the heat transfer to the allowable limits. The effect of flow maldistribution, present on the tube or shell sides of the heat exchangers, in altering the temperature field of tube bundles is also noted.
- Research Organization:
- Foster Wheeler Energy Corp., Livingston, N.J. (USA)
- DOE Contract Number:
- EY-76-C-15-2395
- OSTI ID:
- 7296072
- Report Number(s):
- CONF-761107-27
- Country of Publication:
- United States
- Language:
- English
Similar Records
Baffle seal for sheel and tube heat exchangers
Calculation of mean heat transfer coefficients on the shell side of shell and tube heat exchangers with segmental baffles
Related Subjects
210500* -- Power Reactors
Breeding
BAFFLES
BREEDER REACTORS
CLINCH RIVER BREEDER REACTOR
ENERGY TRANSFER
EPITHERMAL REACTORS
FAST REACTORS
FBR TYPE REACTORS
FLUID FLOW
HEAT EXCHANGERS
HEAT TRANSFER
LIQUID METAL COOLED REACTORS
MATHEMATICAL MODELS
MIXING
POWER REACTORS
REACTORS
SODIUM COOLED REACTORS