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 3–3

(b) Figure 3–43.

Table 3-3

Figure 3–43

Transcribed Image Text:

Tb = 350°C -L=50 mm- X Air, 25°C h = 154 W/m².K k=235 W/m-K w = 100 mm t = 5 mm