Finned tube heat exchanger : correlation of dry surface heat transfer data

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Journal titleASHRAE Transactions
Pages262273; # of pages: 12
Subjectfinned tubes; heat exchangers; heat transfer
AbstractFinned tube heat exchangers are widely used in industry and, in particular, in the area of heating, cooling and air conditioning. Heat transfer data of tube banks with circular tubes and circular or continuous flat plate fins are used to develop an empirical technique to predict the variation of the average heat transfer J-factor with the air side Reynolds number. It is assumed that over the air side for Reynolds number between about 200 and 2000, the functional relationship between J and Re is: J=C[1]Re[C[ 2]]. Also, it is assumed that C[1] and C[2] are dependent on the physical dimensions of the heat exchanger. A step-by- step multiple linear regression analysis method and the previously published heat transfer data are used to determine the most influential groups of coil dimensions to determine the quantities C[1] and C[2]. Comparison between the quantities C[1] and C[2] calculated using this technique with those determined experimentally indicate that the present method is satisfactory. To further verify this method, experimental data were obtained on an eight row coil of the same family. The results showed that the present method can be used for this type of heat exchanger over the given range of air side Reynolds number and the range of the different dimensionless groups given in the text.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number18834
NPARC number20375457
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Record identifierc1b9163f-4ee0-4500-998e-bd9c319b6fd5
Record created2012-07-23
Record modified2016-05-09
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