%0 Journal Article
%A Kim, Nae-Hyun
%A Youn, Baek
%D 2013
%I Begell House
%K heat exchanger, heat transfer coefficient, pressure drop, fin, sine wave, slit
%N 1
%P 43-58
%R 10.1615/JEnhHeatTransf.2013006564
%T AIRSIDE PERFORMANCE OF FIN-AND-TUBE HEAT EXCHANGERS HAVING SINE WAVE OR SINE WAVE-SLIT FINS
%U http://dl.begellhouse.com/journals/4c8f5faa331b09ea,0bef2f170e82edcb,7e6af01b5f8716c6.html
%V 20
%X The heat transfer and friction characteristics of heat exchangers having sine wave or sine wave-slit fins were experimentally investigated. Thirty-eight samples having different waffle heights (1.5 and 2.0 mm), fin pitches (1.3 to 1.7 mm), and tube rows (one to three) were tested. Results show that the sine wave-slit geometry provided 20% higher heat transfer coefficients and 44% higher friction factors than the sine wave geometry. The j/f ratios of the sine wave geometry, however, were higher than those of the sine wave-slit geometry. Within the present geometric variations, the effect of waffle height on the heat transfer coefficient was not prominent. The effect of fin pitch on j and f factor was also negligible for sine wave fin. For sine wave-slit fin, however, both j and f factors increased as fin pitch decreased. New correlations were developed based on the present data.
%8 2013-05-31