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Investigation of inserts to enhance flow boiling heat transfer in tubes.

Author(s) : LIANG X., ZHAI L., HUANG H., et al.

Summary

Helical wire inserts and a new type of perforated strip-type inserts were inserted into tubes of 9.52 mm outer diameter to enhance R-22 flow boiling heat transfer performance in the tubes of louvered fin-and-tube heat exchangers. The total heat transfer capacity of the evaporator with inserts was experimentally compared with that of the evaporator without inserts under the same operating condition. The experiments were carried out in the Air-conditioning and Heat Exchangers Laboratory directly under the authors' incorporation. The experimental results show that the total heat transfer capacity of the evaporators with perforated strip-type inserts were 20% higher than that of the corresponding evaporators with grooved or smooth tubes without inserts. However, the capacity of the evaporator with helical wire inserts was a little lower than that of the corresponding evaporator with grooved tubes without inserts.

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Details

  • Original title: Investigation of inserts to enhance flow boiling heat transfer in tubes.
  • Record ID : 2007-1476
  • Languages: English
  • Source: 2006 Purdue Conferences. 18th International Compressor Engineering Conference at Purdue & 11th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Publication date: 2006/07/17

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