The importance of the finning technology in modernizing simple solar air-heat exchangers

Enhanced Heat Transfer by Oil/Multi-Walled Carbon Nano-Tubes Nanofluid

“…Higher T values are found on both sides of the FUFB, especially on the front. The area containing the hot deflector is higher in terms of temperature compared to the same area in the absence of the fin, as confirmed by many studies [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]37]. On the other hand, high T gradients (TGs) are evident on the front and undersides of the solid parts from the FUFB, and also along the hot exchanger wall behind the SUFB.…”

“…Figure 1c highlights the characteristics of all surfaces of the exchanger. The inlet of the exchanger conduit is subjected to a fluid flow with an axial speed related to the Re values (Reynolds number), as stated in some indexed papers such as Menni et al [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35], Demartini et al [36], and Nasiruddin and Kamran Siddiqui [37]. Five different speeds are simulated in order to demonstrate the effect of flow rate on various dynamic and thermal phenomena.…”

“…Modeling the baffles in terms of their geometry is the goal and path of many researchers in order to update the thermal and energy performance of various solar exchangers (see Kamali and Binesh [12], Wang et al [13], Fawaz et al [14], Boonloi and Jedsadaratanachai [15], Tamna et al [16], Nanan et al [17], Menni [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] in Table 1). The effect of both deflector dimension and flow rate has also been analyzed for complex geometrical obstacles, such as helical baffles.…”