An experimental study of heat transfer and friction characteristics of typical louver fin-and-tube heat exchangers

Heat transfer and friction characteristics of crimped spiral finned heat exchangers with dehumidification

“…The excess pressure drop is attributed to (1) the drag of the large tube; and (2) the ineffective flow separation zone behind the tube which may increase its influence to further downstream and results in more pressure drops associated with it. This phenomenon is analogous to the continuous fin pattern reported by Wang et al [9].…”

An Experimental Study on the Airside Performance of Fin-and-Tube Heat Exchangers Having Wide Louver Fin

“…실험결과 및 고찰 (3,19) 과 Rich (18) 는 f 인자가 열수와 무 관하다고 보고하고 Lee et al (20) 과 Kim et al (21) 은 열수 가 증가하면 f 인자가 감소한다고 보고하고 있다. 상관식은 실험 데이터를 ±20% 내에서 예측한다.…”

Optimum Design of Air-Cooled Fin-and-Tube Heat Exchangers: Accounting for the Effect of Complex Circuiting

“…This value can be directly obtained from the test results provided by the manufacturer if it is available. Otherwise, there are several references for correlation and test data of various fin patterns, namely (1) plain fin geometry (Rich [13,14J, Gray and Webb [15], and Wang et al [16,17]); (2) wavy fm pattern, (Kim et al [18], Wang et al [19,20]; (3) louver fin pattern (Chang et al [21], Wang et al [22,23]; and (4) convex-louver fin pattern (Wang et al [24,25]). …”

“…If the two-phase refrigerant pressure drop cannot be neglected, an effective heat capacity rate of the refrigerant side can be calculated as follows: (22) where AT, is the refrigerant temperature drop by corresponding to the refrigerant pressure drop. In this connection, the &-NTU relation for single-phase fluids is…”