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- W3153484453 abstract "It is well known that the replacement of round tubes to oval tubes in a fin-and-tube heat exchanger reduces the air-side pressure drop as well as the low-performance region behind the tube, which improves the thermal performance of the heat exchanger. However, experimental evidences are lacking, especially for generic heat exchangers. In this study, generic heat exchangers having oval tubes were tested, which included two different oval tube dimension and two different tube pitches. Round tube samples were also tested for a comparison purpose. The effect of fin pitch on j factor was negligible, whereas f factor increased as the fin pitch increased. Furthermore, both the j and f factor decreased as the number of tube row increased. A thermal performance comparison based on the ratio of thermal conductance per unit volume (ηohoAo/Vo) to pressure drop per unit length (ΔP/L) revealed that the oval tube samples yielded a higher performance than the round tube samples, except at a small number of tube row. Furthermore, the best performance was obtained from the oval tube samples having a smaller diameter tube. On the other hand, relatively poor performance was obtained from the oval tube samples having a larger diameter tube, probably due to the large pressure drops. The j and f correlations were developed based on the data." @default.
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- W3153484453 date "2021-04-13" @default.
- W3153484453 modified "2023-10-18" @default.
- W3153484453 title "Experimental investigation on the airside heat transfer and pressure drop of the fin-and-tube heat exchangers having oval tubes" @default.
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- W3153484453 doi "https://doi.org/10.1080/08916152.2021.1906357" @default.
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