Heat transfer characterization of flat plain fins and round tube heat exchangers

Plate Fin and Tube Heat Exchanger Modeling: Effects of Performance Parameters for Turbulent Flow Regime

“…The flow variation in terms of f and j for these two arrangements for a turbulent regime are shown in Figure 3 along with the comparison of the laminar and transition flow from (Bhuiyan et al, 2012a;Bhuiyan et al, 2012b). The trend is very similar to the general trend in friction factor and Colburn factor by Kayansayan (1993) as well as the trend observed for the laminar and transitional regime by the same author. From the plot it can be seen that the friction factor and Colburn factor tend to be almost parallel to each other.…”

“…Several authors (Choi, 2010;Goldstein Jr, 1976;Lu et al, 2011;Pongsoi, Pikulkajorn, Wang, & Wongwises, 2012) have investigated the effects of the number of tube rows on staggered plate finned tube heat exchangers. Several correlations have been proposed to the effects of heat transfer and pressure drop on the performance of heat exchangers for plain fin geometry which gave predictive ability for the plain fin heat exchangers having larger tube diameter, larger longitudinal and transverse tube pitch (Eckels & Rabas, 1987;Junqi, Jiangping, Zhijiu, Yimin, & Wenfeng, 2007;Kayansayan, 1993;Şahin, Akkoca, Öztürk, & Akilli, 2006;Yuan, 2000;Zhang, He, & Tao, 2009) proposed correlations for heat transfer and friction characteristics for several geometric parameters in the thermal and hydraulic performance of a number of plain-fin heat exchangers. A number of studies (Eckels & Rabas, 1987;Syam Sundar, Sharma, & Parveen, 2009) have been conducted into the effect of fin spacing in the performance of fin tube heat exchangers provided test results for the investigation of the effect of fin spacing and fin length.…”

A review on the thermal hydraulic characteristics of the air-cooled heat exchangers in forced convection

“…For example in similar studies, Rich (1973) and Wang et al (1996) argued that the effect of fin pitch was negligible for plainfinned-tube heat exchangers. However when the data of Wang et al (1996), Kayansayan (1993), McQuiston (1978b), andSeshimo &Fuji (1991) was plotted together by Wang et al (2000b), then the effect of the fin spacing could be clearly seen on the Colburn factor. To study the deviation in the results, Wang et al (2000b) carried out a theoretical study on the data reduction method for air-cooled heat exchangers.…”

“…In all these previous studies, the range of the Reynolds number was very small. Therefore, to consider a larger range of Reynolds number (100 ≤ Re ≤ 30000), Kayansayan (1993) performed experiments with 10 samples of heat exchangers. He studied the effect of outer geometry (9.52 mm ≤ D ≤ 16.3 mm, 2.2 mm ≤ S ≤ 4.2 mm, 12 ≤ N r ≤ 19, S t = 22 mm, S l = 40 mm) upon the performance of plate-fin-tube heat exchanger.…”

“…Theoretical studies on the natural and the forced convection over elliptical tubes have been performed by Chao & Fagbenle (1974), and Merkin (1977). In early 1990s, Kayansayan (1993) experimentally studied the effects of fin spacing, number of rows, and number of tubes per row on the heat transfer and the pressure drop characteristics of the plate-finned-tube heat exchangers. After that many researchers, Wang and coworkers (1997Wang and coworkers ( , 2000Wang and coworkers ( , 2000a, Jang & Yang (1998), Ay and group (2002), Nuntaphan et al (2005a, b), He and group (2005), etc., have performed studies on the effect of geometric parameters on the heat transfer and the pressure drop characteristics of the air-cooled heat exchanger.…”