36. Aluminium fins (k = 200 W/m.K) of rectangular profile are attached on a plane wall with 5 mm spacing (200 fin per metre width). The fins are 1 mm thick, 10 mm long. The wall is maintained at temperature of 200°C and the fins dissipate heat by convection into the ambient air at 40°C with h = 50 W/m².K. Determine : (a) the fin efficiency, (b) the area weighted fin efficiency, (c) the heat loss per square metre of the wall. [Ans. (c) 37.8 kW/m²]
36. Aluminium fins (k = 200 W/m.K) of rectangular profile are attached on a plane wall with 5 mm spacing (200 fin per metre width). The fins are 1 mm thick, 10 mm long. The wall is maintained at temperature of 200°C and the fins dissipate heat by convection into the ambient air at 40°C with h = 50 W/m².K. Determine : (a) the fin efficiency, (b) the area weighted fin efficiency, (c) the heat loss per square metre of the wall. [Ans. (c) 37.8 kW/m²]
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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![36. Aluminium fins (k = 200 W/m.K) of rectangular
profile are attached on a plane wall with 5 mm
spacing (200 fin per metre width). The fins are 1 mm
thick, 10 mm long. The wall is maintained at
temperature of 200°C and the fins dissipate heat by
convection into the ambient air at 40°C with
h = 50 W/m2.K. Determine : (a) the fin efficiency,
(b) the area weighted fin efficiency, (c) the heat loss
per square metre of the wall. [Ans. (c) 37.8 kW/m²]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F971dfe90-ab5f-44ba-95af-89d9f8a5b497%2F1f3ca4d3-77b3-4dea-a272-f0ebdb2a0688%2F8okilm6_processed.jpeg&w=3840&q=75)
Transcribed Image Text:36. Aluminium fins (k = 200 W/m.K) of rectangular
profile are attached on a plane wall with 5 mm
spacing (200 fin per metre width). The fins are 1 mm
thick, 10 mm long. The wall is maintained at
temperature of 200°C and the fins dissipate heat by
convection into the ambient air at 40°C with
h = 50 W/m2.K. Determine : (a) the fin efficiency,
(b) the area weighted fin efficiency, (c) the heat loss
per square metre of the wall. [Ans. (c) 37.8 kW/m²]
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