Original scientific paper

https://doi.org/10.21278/TOF.474056123

Experimental Heat Transfer Analysis from Helical Coiled Tubes with the Same Surface Area

Mustafa Caner orcid.org/0000-0002-3674-7881 ; Sivas Cumhuriyet University, Mechanical Eng. Dept., Sivas, Türkiye
Ertan Buyruk ; Sivas Cumhuriyet University, Mechanical Eng. Dept., Sivas, Türkiye
Ahmet Can ; Istanbul Rumeli University Institute of Science Faculty of Eng. and Arc., Istanbul, Türkiye

Abstract

Helical coiled tubes are commonly used in water storage tanks. In this study, an experimental investigation was carried out to obtain the heat transfer characteristics of different geometric dimensions of helical tubes under steady state conditions. Helical coiled tubes of different geometric dimensions with the same overall length and total surface area were fabricated from the same copper tubes. The helical coiled tubes were placed in a hot water tank which could be adjusted to different water temperatures. Cold water was pumped into the helical coiled tubes at different flow rates at 20 °C. The experiments were carried out for laminar flow in the range of Re numbers between 3394 and 8332. The helical coiled tube Nu number was determined and compared with the literature. Then, the effectiveness of the helical coiled tubes was calculated using the ε-NTU method.

Keywords

Heat exchanger; helical coiled tube; ε-NTU; Nu number

Hrčak ID:

309996

URI

https://hrcak.srce.hr/309996

Publication date:

28.9.2023.

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