A plane wall with surface temperature of 350°C is attached with straight rectangular fins (k= 235 W/m∙K). The fins are exposed to an ambient air condition of 25°C and the convection heat transfer coefficient is 154 W/m2∙K. Each fin has a length of 50 mm, a base of 5 mm thick and a width of 100 mm. Determine the efficiency, heat transfer rate, and effectiveness of each fin. using (a) Table 17−3 and (b) Figure 17-43.
