Performance Ranking of Plate-Fin Heat Exchanger Surfaces

1978 ◽  
Vol 100 (3) ◽  
pp. 514-519 ◽  
Author(s):  
J. G. Soland ◽  
W. M. Mack ◽  
W. M. Rohsenow
Keyword(s):  
Heat Exchanger ◽  
Simplified Analysis ◽  
Comparison Criteria ◽  
Performance Ranking

The Kays-London [4] way of presenting heat exchanger performance is modified to use the data in the simplified analysis of La Haye, et al. [5] which was extended to permit the ready comparison of the performance of the various plate-fin surfaces. Based on the four comparison criteria considered, the wavy finned 17.8–3/8 W surface of Kays-London is the best.

Direct Observation of Heat Exchanger Deposits by Cross Sectioning

1967 ◽  
Vol 25 ◽  
pp. 364-365
Author(s):  
R. W. Anderson ◽  
D. L. Senecal
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Heat Exchanger ◽  
Direct Observation ◽  
Cross Sections ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Flowing Water ◽  
Transmission Electron ◽  
Deposit Layer

A problem was presented to observe the packing densities of deposits of sub-micron corrosion product particles. The deposits were 5-100 mils thick and had formed on the inside surfaces of 3/8 inch diameter Zircaloy-2 heat exchanger tubes. The particles were iron oxides deposited from flowing water and consequently were only weakly bonded. Particular care was required during handling to preserve the original formations of the deposits. The specimen preparation method described below allowed direct observation of cross sections of the deposit layers by transmission electron microscopy.The specimens were short sections of the tubes (about 3 inches long) that were carefully cut from the systems. The insides of the tube sections were first coated with a thin layer of a fluid epoxy resin by dipping. This coating served to impregnate the deposit layer as well as to protect the layer if subsequent handling were required.

EFFECT OF AMBIENT HEAT-IN-LEAKS ON A THREE-FLUID CRYOGENIC HEAT EXCHANGER WITH TWO THERMAL COMMUNICATIONS

2014 ◽  
Vol 6 (4) ◽  
pp. 285-300 ◽  
Author(s):  
Venkataram Krishna ◽  
S. Spoorthi ◽  
Pradeep G. Hegde ◽  
K. N. Seetharamu
Keyword(s):  
Heat Exchanger
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