Example: current of 200 A is passed through a stainless-steel wire [k = 19 W/m · ◦C] 3 mm in diameter. he resistivity of the steel may be taken as 70 μ · cm, and the length of the wire is 1 m. The ire is submerged in a liquid at 110 ◦C and experiences a convection heat-transfer coefficient of k W/m2 · ◦C. Calculate the center temperature of the wire.

Determine the thermal resistance of the radiator R, if the maximum allowable processor temperature TCPU equals 73 C, maximum allowable radiator 21x 10, clock frequency temperature 38° C, heatcapacity radiator 3,6x 10, voltage1,3. температура

silicon carbide (T ≈ 300 K): k = 490 W/m⋅K

Problem: A straight rectangular fin of uniform cross section is connected to a base with constant temperature of 100°C (T¿). The fin is made of copper (k = 400 W/mK) with thickness (t) of 1 mm, width (w) of 3 cm, and length (L) of 5 cm. The system is exposed to the ambient air with temperatu of 30 °C and heat transfer coefficient of 30 [W/m?K]. If the temperature at the tip is known as 40 ° (T (x = L)), determine the following: 1. Temperature at the middle of the fin (i.e., at x = 2.5cm). 2. The fin efficiency To,h Ть L