An airside performance of the wavy fin-and-tube heat exchangers having oval tubes

Nae Hyun Kim*, Cheol Hwan Kim, Ho Seung Han

*この研究の対応する著者

研究成果: Article査読

2 被引用数 (Scopus)

抄録

In this study, the air-side heat transfer and pressure drop characteristics of the fin-and-tube heat exchangers having an oval tube or a round tube were investigated. Notable things of the samples were that the round and the oval tube had the same perimeter, the fins had the same configuration, and the samples had the same tube pitch. Thus, only the tube shapes were different. The tests were conducted both under dry and wet condition. The thermal performance comparison (ηohoAo/Vo vs. ΔP/L) revealed that a better performance was resulted from the oval tube samples. Under the wet condition, however, the reverse was true. The oval tube samples yielded an inferior thermal performance, probably due to a poor condensate drainage from the oval tube. The pressure drops of the round tube samples were larger than those of the oval tube samples. Furthermore, the pressure drops under wet condition were larger than those under dry condition. The j factor was relatively independent of the fin pitch, whereas the f factor increased as the fin pitch increased. Under wet condition, however, some interesting feature was noticed. The highest j factor was obtained at a two row configuration. A possible explanation was provided considering the condensate drainage behavior.

本文言語English
論文番号116807
ジャーナルApplied Thermal Engineering
190
DOI
出版ステータスPublished - 2021 5月 25
外部発表はい

ASJC Scopus subject areas

  • エネルギー工学および電力技術
  • 産業および生産工学

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