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http://dx.doi.org/10.3795/KSME-B.2008.32.9.695

Numerical Analysis for the Air-Side Convective Heat Transfer Characteristics in a Compact Heat Exchanger with Flat Tubes and Plate Fins According to the Aspect Ratio  

Moh, Jeong-Hah (원광대학교 기계자동차공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.32, no.9, 2008 , pp. 695-703 More about this Journal
Abstract
Numerical analysis has been carried out to investigate air-side convective heat transfer characteristics in a compact heat exchanger with flat tubes and continuous plate fins according to the aspect ratio. RNG k-$\varepsilon$ model is applied for turbulence analysis. Simulation results such as air velocity and temperature distributions are presented, and heat transfer coefficients are compared with previous correlations for circular tubes. The numerical conditions are considered for the aspect ratios ranging from 3.06 to 5.44 and Reynolds number ranging from 1000 to 10,000. The results showed that heat transfer coefficients decreased with the increase of aspect ratio. From the calculated results a correlation of Colburn j factor for the considered aspect ratio in the compact heat exchanger system is suggested. The predicted results in this study can be applied to the optimal design of air conditioning system.
Keywords
Compact Heat Exchanger; Convective Heat Transfer; Air; Colburn j Factor; Recirculating Flow; Aspect Ratio; Flat Tubes and Plate Fins; Friction Factor;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By SCOPUS : 2
연도 인용수 순위
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