首页> 外文会议>2004 International Refrigeration and Air Conditioning Conference at Purdue vol.1; 20040712-15; West Lafayette,IN(US) >EFFECTS OF FIN AND TUBE ALIGNMENT ON THE HEAT TRANSFER PERFORMANCE OF FINNED-TUBE HEAT EXCHANGERS WITH LARGE FIN PITCH
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EFFECTS OF FIN AND TUBE ALIGNMENT ON THE HEAT TRANSFER PERFORMANCE OF FINNED-TUBE HEAT EXCHANGERS WITH LARGE FIN PITCH

机译:翅片和管子对准对大翅片翅片管换热器传热性能的影响

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摘要

The objective of this study is to provide experimental data that can be used in the optimal design of finned-tube heat exchangers with large fin pitch. In this study, six types of fined tubes were tested by varying airflow rate. Both the effects of number of tube row, fin pitch, and fin type and the influences of tube and fin alignment on the heat transfer performance are investigated. The air-side heat transfer coefficient is calculated from the measured data. Staggered fin and tube alignments improve heat transfer performance by 7% and 10%, respectively, as compared to the inlined fin alignment. By applying both the staggered fin and tube alignments, the heat transfer performance increases by approximately 20% as compared to the continuous flat plate finned-tube. The heat transfer performance decreases with a rise of tube number. For large fin pitch, the effects of fin pitch on the heat transfer performance are negligible.
机译:这项研究的目的是提供可用于大翅片节距的翅片管换热器的优化设计的实验数据。在这项研究中,通过改变气流速率对六种细管进行了测试。研究了管排数,翅片间距和翅片类型的影响以及管翅片对准对传热性能的影响。空气侧传热系数是根据测量数据计算得出的。与嵌入式翅片对准相比,交错的翅片和管对准分别将传热性能提高了7%和10%。通过应用交错的翅片和管对齐,与连续平板翅片管相比,传热性能提高约20%。传热性能随着管数的增加而降低。对于大的翅片节距,翅片节距对传热性能的影响可以忽略不计。

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