Problem 3:InsulationTo=1ToowwwwSteamTx2T₂ T3www wwwR₁ R₁ R₂www.TR₂Steam at Tx1 = 320 °C flows in a cast iron pipe (k = 80 W/m. °C) whose inner and outer diameters are5 cm = 0.05 m and D₂ = 5.5 cm = 0.055 m, respectively. The pipe is covered with 3-cm-thick glass woolinsulation with k = 0.05 W/m. °C. Heat is lost to surroundings at T2 = 5 °C by natural convection andradiation, with a combined heat transfer coefficient of h₂ = 18 W/m². °C. Taking the heat transfer coefficientinside the pipe to be h₁ = 60 W/m². °C, determine the temperature drops across the pipe and the insulation.The determination is based on a unit length of the pipe (L = 1 m).Assumptions1. Heat transfer is one-dimensional since there is no indication of any change with time.2.Heat transfer is one-dimensional since there is thermal symmetry about the centreline and novariation in the axial direction.3. Thermal conductivities are constant.4. The thermal contact resistant at the interface is negligible.D₁= What to Submit:Submit the following figures and table:Temperature plot of steam pipe assembly in C° units.Temperature plot scoped to insulator (glass wool) in C° units.

Given: THe The inner and outer diameter are The thermal conductivity of cast iron The temperature of…

Answered: What to Submit: Submit the following…

What to Submit: Submit the following figures and table: • Temperature plot of steam pipe assembly in C° units. Temperature plot scoped to insulator (glass wool) in C° units.

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

Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.

Question

Problem 3:
Insulation
To=1
Toowwww
Steam
Tx2
T₂ T3
www www
R₁ R₁ R₂
www.T
R₂
Steam at Tx1 = 320 °C flows in a cast iron pipe (k = 80 W/m. °C) whose inner and outer diameters are
5 cm = 0.05 m and D₂ = 5.5 cm = 0.055 m, respectively. The pipe is covered with 3-cm-thick glass wool
insulation with k = 0.05 W/m. °C. Heat is lost to surroundings at T2 = 5 °C by natural convection and
radiation, with a combined heat transfer coefficient of h₂ = 18 W/m². °C. Taking the heat transfer coefficient
inside the pipe to be h₁ = 60 W/m². °C, determine the temperature drops across the pipe and the insulation.
The determination is based on a unit length of the pipe (L = 1 m).
Assumptions
1. Heat transfer is one-dimensional since there is no indication of any change with time.
2.
Heat transfer is one-dimensional since there is thermal symmetry about the centreline and no
variation in the axial direction.
3. Thermal conductivities are constant.
4. The thermal contact resistant at the interface is negligible.
D₁=

What to Submit:
Submit the following figures and table:
Temperature plot of steam pipe assembly in C° units.
Temperature plot scoped to insulator (glass wool) in C° units.

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