• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Experimental heat transfer >Experimental investigation on the airside heat transfer and pressure drop of the fin-and-tube heat exchangers having oval tubes
【24h】

Experimental investigation on the airside heat transfer and pressure drop of the fin-and-tube heat exchangers having oval tubes

机译：Experimental investigation on the airside heat transfer and pressure drop of the fin-and-tube heat exchangers having oval tubes

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

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 (eta(o)h(o)A(o)/V-o) to pressure drop per unit length (Delta P/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.

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号