Airside performance of fin-and-tube heat exchangers having sine wave fins under wet condition

다국어 초록 (Multilingual Abstract)

In this study, experiments are conducted on sine wave heat exchangers under wet condition, and the results are compared with those ofherringbone wave heat exchangers having same wave height. Sine wave samples yield higher j and f factors than herringbone wave samples.

The reason may be attributed to the reduced recirculation zone in the valleys of the sine wave channel. The effect of fin pitch on jand f factor is not pronounced both for sine and herringbone wave heat exchangers. The j factor decreases as number of tube row increases.

However, the effect of number of tube row on f factor is dependent on the fin configuration. For herringbone wave samples, ffactor decreases as the number of tube row increases. For sine wave samples, on the other hand, f factor is independent of the number of tuberow. Ratios of j/f 1/3 between sine wave and herringbone wave samples are between 0.95 and 1.0, which decrease with theincrease of finpitch. A new correlation was developed based on the present data.

참고문헌 (Reference)

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