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3.7 The height and diameter of a pin fin made of 3003 aluminum are 2.3 cm...
3.1 The height, length, and thickness of a longitudinal fin of 6061 aluminum are 3.2 cm,...
3.1 The height, length, and thickness of a longitudinal fin of 6061 aluminum are 3.2 cm, 15 cm, and 2 mm, re- spectively. If the fin base is maintained at a temperature of 55°C and the surrounding air temperature is 20°C, where the heat-transfer coefficient is 34 W/m2.K, what is the heat transfer from the fin?
A pin fin is made of an Aluminum (k=235W/m K) rod length 68 cm and diameter...
A pin fin is made of an Aluminum (k=235W/m K) rod length 68 cm and diameter 10 mm. If the heat transfer coefficient is 10 W/m2 K, calculate the fin efficiency. a. 27% b. 46% c. 35% d. 56% e. 97% f. None of them A 2-m-high, 3-m-wide, and 120-cm-thick wall of a house has a thermal resistance of 0.0124 ºC/W. The thermal conductivity of the wall is a. 0.72 W/mºC b. 1.1 W/mºC c. 1.6 W/mºC d. 16 W/mºC...
2. A hot surface at 120°C is cooled by attaching a 6-cm-long, 0.6-cm-diameter pin fin (k...
2. A hot surface at 120°C is cooled by attaching a 6-cm-long, 0.6-cm-diameter pin fin (k 220 W/m K, a 97.1 x 10 m2/s). The temperature of the surrounding air is 15°C, and the heat transfer coefficient on the fin surface is 30 W/m2 K. Assuming one-dimensional heat conduction along the fin, an adiabatic tip, and taking the nodal spacing to be Ax 3 cm, determine the tip temperature.
A copper pin fin 2.5 mm in diameter protrudes from a wall at 100°C into air...
A copper pin fin 2.5 mm in diameter protrudes from a wall at 100°C into air at 28°C. ( k=396 W/m-K.) The heat transfer is mainly by natural convection with a heat transfer coefficient of 12 W/m2×K. Calculate heat losses from the fin assuming the fin is infinitely long. If there is an array of 10 copper pin fins, how much power do they dissipate?
Problem 2 A 4 mm diameter and 20 cm long aluminum fin (k 240 W/m-K) is...
Problem 2 A 4 mm diameter and 20 cm long aluminum fin (k 240 W/m-K) is attached to a surface. If the heat transfer coefficient is 12 W/m2 K, determine the percent error in the rate of heat transfer from the fin when the infiniely long fin assumption is used nstead of the adiabatic fin tip assumption. D-4 mm L- 10 cm Fig. 2 fin
4. A silicon chip is attached with a copper pin fin in order to enhance the...
4. A silicon chip is attached with a copper pin fin in order to enhance the heat transfer. The square shape silicon chip has a width of W=10 mm on each side. The length and diameter of the copper pin are L=20 mm and D=4 mm, respectively. During the operation, the surface of the chip, as well as the base of the pin, are maintained at the temperature of To=375 K. The thermal conductivity of the copper pin fin is...
4. A silicon chip is attached with a copper pin fin in order to enhance the...
4. A silicon chip is attached with a copper pin fin in order to enhance the heat transfer. The square shape silicon chip has a width of W=10 mm on each side. The length and diameter of the copper pin are L=20 mm and D=4 mm, respectively. During the operation, the surface of the chip, as well as the base of the pin, are maintained at the temperature of To=375 K. The thermal conductivity of the copper pin fin is...
4. A silicon chip is attached with a copper pin fin in order to enhance the...
4. A silicon chip is attached with a copper pin fin in order to enhance the heat transfer. The square shape silicon chip has a width of W=10 mm on each side. The length and diameter of the copper pin are L=20 mm and D=4 mm, respectively. During the operation, the surface of the chip, as well as the base of the pin, are maintained at the temperature of To=375 K. The thermal conductivity of the copper pin fin is...
Consider a very long aluminum fin (k = 237W/m-K) fin
Consider a very long aluminum fin (k = 237W/m-K) fin, with the temperature at the end of the fin essentially that of the surrounding air. This fin has a diameter of lcm, and is attached to a surface at 80°C. The surface is exposed to ambient air at 22°C with a heat transfer coefficient of 15W/m2-K. Estimate: a) The fin temperature at a distance of 5cm from the base; b) The rate of heat loss from the entire fin; c) The effectiveness of...
Question 14 A radial fin made of 2024 aluminium; inside and outside radii of 3.1 cm...
Question 14 A radial fin made of 2024 aluminium; inside and outside radii of 3.1 cm and 4.9 cm, respectively, and the fin thickness is 0.75mm. The fin experiences the heat transfer coefficient is 85 W/m2K. Find the heat transfer from the fin if the base temperature of the fin is measured 175C. a flow of 30C air, in which
3.1 The height, length, and thickness of a longitudinal fin of 6061 aluminum are 3.2 cm, 15 cm, and 2 mm, re- spectively. If the fin base is maintained at a temperature of 55°C and the surrounding air temperature is 20°C, where the heat-transfer coefficient is 34 W/m2.K, what is the heat transfer from the fin?
2. A hot surface at 120°C is cooled by attaching a 6-cm-long, 0.6-cm-diameter pin fin (k 220 W/m K, a 97.1 x 10 m2/s). The temperature of the surrounding air is 15°C, and the heat transfer coefficient on the fin surface is 30 W/m2 K. Assuming one-dimensional heat conduction along the fin, an adiabatic tip, and taking the nodal spacing to be Ax 3 cm, determine the tip temperature.
Problem 2 A 4 mm diameter and 20 cm long aluminum fin (k 240 W/m-K) is attached to a surface. If the heat transfer coefficient is 12 W/m2 K, determine the percent error in the rate of heat transfer from the fin when the infiniely long fin assumption is used nstead of the adiabatic fin tip assumption. D-4 mm L- 10 cm Fig. 2 fin
4. A silicon chip is attached with a copper pin fin in order to enhance the heat transfer. The square shape silicon chip has a width of W=10 mm on each side. The length and diameter of the copper pin are L=20 mm and D=4 mm, respectively. During the operation, the surface of the chip, as well as the base of the pin, are maintained at the temperature of To=375 K. The thermal conductivity of the copper pin fin is...
4. A silicon chip is attached with a copper pin fin in order to enhance the heat transfer. The square shape silicon chip has a width of W=10 mm on each side. The length and diameter of the copper pin are L=20 mm and D=4 mm, respectively. During the operation, the surface of the chip, as well as the base of the pin, are maintained at the temperature of To=375 K. The thermal conductivity of the copper pin fin is...
4. A silicon chip is attached with a copper pin fin in order to enhance the heat transfer. The square shape silicon chip has a width of W=10 mm on each side. The length and diameter of the copper pin are L=20 mm and D=4 mm, respectively. During the operation, the surface of the chip, as well as the base of the pin, are maintained at the temperature of To=375 K. The thermal conductivity of the copper pin fin is...
Question 14 A radial fin made of 2024 aluminium; inside and outside radii of 3.1 cm and 4.9 cm, respectively, and the fin thickness is 0.75mm. The fin experiences the heat transfer coefficient is 85 W/m2K. Find the heat transfer from the fin if the base temperature of the fin is measured 175C. a flow of 30C air, in which
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