Experimental study on the heat transfer and pressure drop of a cross-flow heat exchanger with different pin-fin arrays
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Tarih
2011
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, convective heat transfer and pressure drop in a cross-flow heat exchanger with hexagonal, square and circular (HSC) pin-fin arrays were studied experimentally. The pin-fins were arranged in an in-line manner. For the applied conditions, the optimal spacing of the pin-fin in the span-wise and stream-wise directions has been determined. The variable parameters are the relative longitudinal pitch (SL /D = 2, 2.8, 3.5), and the relative transverse pitch was kept constant at ST /D = 2. The performances of all pin-fins were compared with each other. The experimental results showed that the use of hexagonal pin-fins, compared to the square and circular pin-fins, can lead to an advantage in terms of heat transfer enhancement. The optimal inter-fin pitches are provided based on the largest Nusselt number under the same pumping power, while the optimal inter-fin pitches of hexagonal pin-fins are ST /D = 2 and SL /D = 2.8. Empirical equations are derived to correlate the mean Nusselt number and friction coefficient as a function of the Reynolds number, pin-fin frontal surface area, total surface area, and total number. Consequently, the general empirical formula is given in the present form. NuD = a(ReD)b(N tAf/Atotal)c and f = a(Re D)b © 2011 Springer-Verlag.
Açıklama
Anahtar Kelimeler
Heat Transfer, Root Mean Square Error, Nusselt Number, Test Section, Friction Factor
Kaynak
Heat and Mass Transfer/Waerme- und Stoffuebertragung
WoS Q Değeri
N/A
Scopus Q Değeri
Q2
Cilt
47
Sayı
9
Künye
Kotcioğlu, İ., Çalışkan, S., Başkaya, Ş. (2011). Experimental study on the heat transfer and pressure drop of a cross-flow heat exchanger with different pin–fin arrays. Heat and Mass Transfer, 47(9), 1133-1142.
