The fin array shown below consists of 25 cylindrical pin-fins on a 10-mm thick, 50-mm x 50-mm base plate. Each fin is 25 mm long with a 4-mm diameter. The fin array is made of brass (30% Zn). The edges of the base plate are insulated. The surface of the array with the fins is exposed to air at T = 20°C with h=80 W/m² .K . The flat side of the array is exposed to water at T = 100°C with h=1600 W/m².K. Find the rate of heat transfer from the surface of the fin array to the air (answer: 50 W). 10 mm- 111 T = 100°C h = 1600 W/m².K - 25 mm 4 mm 111 T. = 20°C h = 80 W/m³-K 50 mm 50 mm

The fin array shown below consists of 25 cylindrical pin-fins on a 10-mm thick, 50-mm x 50-mm base plate. Each fin is 25 mm long with a 4-mm diameter. The fin array is made of brass (30% Zn). The edges of the base plate are insulated. The surface of the array with the fins is exposed to air at T = 20°C with h=80 W/m² .K . The flat side of the array is exposed to water at T = 100°C with h=1600 W/m².K. Find the rate of heat transfer from the surface of the fin array to the air (answer: 50 W). 10 mm- 111 T = 100°C h = 1600 W/m².K - 25 mm 4 mm 111 T. = 20°C h = 80 W/m³-K 50 mm 50 mm

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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An insulated steam pipe located where the ambient temperature is 32°C, has an inside diameter of 50 mm with 10 mm thick wall. The outside diameter of the corrugated asbestos insulation is 125 mm and the surface coefficient of still air, h, = 12 W/m²-K. Inside the pipe is steam having a temperature of 150°C with film coefficient h; = 6000 W/m2-K. Thermal conductivity of pipe and asbestos insulation are 45 and 0.12 W/m-K respectively. Determine the heat loss per unit length of pipe. O 120 W O 110 W O 140 W O 130 W
You can neglect radiation at the bottom of the plate; the bottom side of the plate has water flowing underneath it. Often, when dealing with liquids (rather than gases), one can neglect radiation because heat transfer due to convection is so much larger (liquids tend to have higher convection coefficient values than gases).
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Solve it correctly please. I will rate accordingly with 4votes but I need correct answer.
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