Single-phase heat transfer in a multiport minichannel tube-in-tube heat exchanger
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Publication Details
Author list: Kaew-On J., Wongwises S.
Publisher: Hindawi
Publication year: 2012
Start page: 435
End page: 441
Number of pages: 7
ISBN: 9780791844793
ISSN: 0146-9428
eISSN: 1745-4557
Languages: English-Great Britain (EN-GB)
Abstract
In the present work, the single-phase heat transfer of water flowing through the multiport minichannel heat exchanger was experimentally studied. The inner tube was made from the extruded multiport aluminum tube with hydraulic diameter of 1.1mm and the 14 number of channel, while the outer tube was made from the acrylic circular tube with an internal hydraulic diameter of 25.4 mm. The singlephase heat transfer performance is experimentally determined based on the water-to-water operation. The experiments have been carried out by varying flow rates and temperatures of water on both sides. The Reynolds numbers were approximately 500-4000 on the inner tube and 1000-5000 on the outer tube. The LMTD method was employed to investigate the heat transfer and the experimental results were compared with the existing correlations from the literature. Finally, the Nusselt number correlation for single-phase flow of the water flowing through the multiport minichannel has also been proposed. Copyright ฉ 2012 by ASME.
Keywords
Multiport minichannel, Nusselt number correlation, Tube-in-tube
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