LOCAL SHELL-SIDE HEAT TRANSFER COEFFICIENTS IN THE VICINITY OF SEGMENTAL BAFFLES IN TUBULAR HEAT EXCHANGERS
Local heat transfer coefficients were studied in detail in the central baffle space between two segmental baffles in a tubular heat exchanger. Two baffle spacings and three now rates were investigated. Average over-all Nusselt numbers determined from the measured local coefficients compare favorably with average Nusselt numbers measured by other workers. The data are presented in picture form, which permitted a schematic diagram of the now pattern in the baffle space to be drawn. The results indicate the presence of three flow zones between two baffles. The longitudinal-flow zone occurs in the baffle windows; the cross- and eddy-flow zones occur on the downstream and upstream sides of the baffle space, respectively. Heat transfer rates were in general higher in the eddy-flow zone. The heat transfer rate varies along individual tubes from a maximum at the baffle to a minimum midway in the baffle. The minimum value is one-fourth to one-half the value at the baffle. (auth)
- Research Organization:
- Oregon State Coll., Corvallis
- NSA Number:
- NSA-14-012682
- OSTI ID:
- 4193680
- Journal Information:
- Chem. Eng. Progr., Journal Name: Chem. Eng. Progr. Vol. Vol: 55, Symposium Ser. No. 29
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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