A plane wall with surface temperature of 300°C is attached with straight aluminum triangular fins (k = 236 W/m · K). The fins are exposed to an ambient air condition of 25°C and the convection heat transfer coefficient is 25 W/m² · K. Each fin has a length of 55 mm, a base of 4 mm thick and a width of 110 mm. Using Table 3–4, determine the efficiency, heat transfer rate, and effectiveness of each fin.

Table 3–4

Transcribed Image Text:

t = 4 mm Tb = 300°C L = 55 mm k = 236 W/m-K Air, 25°C h = 25 W/m².K w = 110 mm