TY - JOUR
T1 - Brazed aluminum heat exchangers and their air side performance
AU - Chang, Yu Juei
AU - Wang, Chi-Chuan
PY - 2017/1/1
Y1 - 2017/1/1
N2 - Extensive experiments on the heat transfer and pressure drop characteristics of brazed aluminum heat exchangers were carried out. In the present study, 27 samples of louvered fin heat exchangers with different geometrical parameters, including tube width, louver length, louver pitch, fin height, and fin pitch were tested in an induced draft open wind tunnel. Results are presented as plots of friction factor, f, and Colburn j factor against Reynolds number based on louver pitch in the range of 100 to 1000. Comparisons between the Sahnoun and Webb model and the present test data are reported and good agreements were found. By introducing "area ratio" parameters, a simpler correlation of the Colburn j factor and friction factor f were obtained. It is shown that 85% of the experimental data of heat transfer and friction data were correlated within ± 10%.
AB - Extensive experiments on the heat transfer and pressure drop characteristics of brazed aluminum heat exchangers were carried out. In the present study, 27 samples of louvered fin heat exchangers with different geometrical parameters, including tube width, louver length, louver pitch, fin height, and fin pitch were tested in an induced draft open wind tunnel. Results are presented as plots of friction factor, f, and Colburn j factor against Reynolds number based on louver pitch in the range of 100 to 1000. Comparisons between the Sahnoun and Webb model and the present test data are reported and good agreements were found. By introducing "area ratio" parameters, a simpler correlation of the Colburn j factor and friction factor f were obtained. It is shown that 85% of the experimental data of heat transfer and friction data were correlated within ± 10%.
KW - Brazed aluminum heat exchanger
KW - Flat or round tube
KW - Louver fin
UR - http://www.scopus.com/inward/record.url?scp=85049402764&partnerID=8YFLogxK
U2 - 10.1615/JEnhHeatTransf.v24.i1-6.100
DO - 10.1615/JEnhHeatTransf.v24.i1-6.100
M3 - Article
AN - SCOPUS:85049402764
VL - 24
SP - 145
EP - 158
JO - Journal of Enhanced Heat Transfer
JF - Journal of Enhanced Heat Transfer
SN - 1065-5131
IS - 1-6
ER -