Task 3 A hot water pipe that is used for domestic applications of 0.12 m outside diameter is insulated with a layer of calcium silicate. If the insulation is 20 mm thick and its inner and outer surfaces are maintained at Ts,1= 800 K and Ts,2= 490 K, respectively (a) What is the heat loss per unit length (q') of the pipe? (b) Explore the effect of insulation thickness on the heat loss q' and outer surface temperature T3,2 with the inner surface temperature being fixed at 800 K. The outer surface is exposed to moving

Task 3 A hot water pipe that is used for domestic applications of 0.12 m outside diameter is insulated with a layer of calcium silicate. If the insulation is 20 mm thick and its inner and outer surfaces are maintained at Ts,1= 800 K and Ts,2= 490 K, respectively (a) What is the heat loss per unit length (q') of the pipe? (b) Explore the effect of insulation thickness on the heat loss q' and outer surface temperature T3,2 with the inner surface temperature being fixed at 800 K. The outer surface is exposed to moving

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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Concept explainers

Engineering Drawing

Technical drawing has been around since ancient times. As in the ancient Renaissance, complicated drawings were created, including Leonardo da Vinci's drawing. Modern engineering drawing, including its specific orthographic projection with scale conventions, began in Europe (France) during the early stages of Industrialization. L.T. C. Rolt also made some of Marc's drawings for its block-making machinery (in 1799) that also may have contributed significantly to British engineering technology. Since he learned the art of presenting three-dimensional(3D) items in a two-dimensional(2D) plane, as we now term mechanical drawing. 

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Task 3
A hot water pipe that is used for domestic applications of 0.12 m outside diameter is insulated with
a layer of calcium silicate. If the insulation is 20 mm thick and its inner and outer surfaces are
maintained at Ts,1= 800 K and Ts,2= 490 K, respectively
(a) What is the heat loss per unit length (q') of the pipe?
(b) Explore the effect of insulation thickness on the heat loss q’ and outer surface temperature T52
with the inner surface temperature being fixed at 800 K. The outer surface is exposed to moving
airflow (T= 25°C) that maintains a convection coefficient of 25 W/m².K and to large surroundings
for which Tsurf = T» = 25°C. The surface emissivity of calcium silicate is approximately 0.9.
Compute and plot the temperature distribution in the insulation material as a function of the radial
r-R
coordinate,
,where ri = 0.06 m and r2 has a range of (0.06< r2 <0.2 m). Compute and plot the
heat loss as a function of the insulation thickness for 0< (r2 - ri) <0.14 m. Given the thermal
conductivity of calcium silicate insulation equals to 0.089 W/m.K.

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