Abstract
The effect of the number of staggered rows on the mean outside heat transfer coefficient for air flowing across extended surface tubes (finned tubes) has been determined experimentally. When the heat transfer coefficient is reported as a function of the Reynolds number, both the power to which the Reynolds number is raised and the constant of proportionality vary with the number of rows. A general correlation has been developed relating the outside heat transfer coefficients the Reynolds number, and the number of rows. The maximum deviation from this equation is 35%, with an average deviation of plus or minus 4.5%. Curves, tables, and equations are given for design purposes.
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