صقات A coat is made of 5 layers of 0.1 mm thick synthetic fabric separated by 1.5 mm thick air space. 1. Calculate the rate of heat loss through the jacket. 2. Compared the heat loss through a jackets without the air space. 3. Calculate the equivalent thickness of a wool coat, which has same total heat resistances of the synthetic fabric. Given: The thermal conductivities are given to be k = 0.13 W/m-°C for synthetic fabric, k = 0.026 W/m-°C for air, and k = 0.035 W/m °C for wool fabric, area of heat transfer 1.1 m², T1 = 28 °C, To=(-5 °C), and air heat transfer coefficient 25 W/m². C.) Assumptions: المة المرتلة من الخارج مرو المنوال 1 Heat transfer is steady since there is no indication of change with time. 2 Heat transfer through the jacket is one-dimensional. 3 Thermal conductivities are constant. 4 Heat transfer coefficients account for the radiation heat transfer.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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صقات
A coat is made of 5 layers of 0.1 mm thick synthetic fabric separated by 1.5 mm thick air
space.
1. Calculate the rate of heat loss through the jacket.
2. Compared the heat loss through a jackets without the air space.
3. Calculate the equivalent thickness of a wool coat, which has same total heat resistances
of the synthetic fabric.
Given: The thermal conductivities are given to be k = 0.13 W/m-°C for synthetic fabric, k =
0.026 W/m-°C for air, and k = 0.035 W/m °C for wool fabric, area of heat transfer 1.1 m²,
T1 = 28 °C, To = (-5°C), and air heat transfer coefficient 25 W/m². C. 43)
Assumptions:
المراة المرحلة من الخارج
1 Heat transfer is steady since there is no indication of change with time.
2 Heat transfer through the jacket is one-dimensional.
3 Thermal conductivities are constant.
4 Heat transfer coefficients account for the radiation heat transfer.
12
Transcribed Image Text:صقات A coat is made of 5 layers of 0.1 mm thick synthetic fabric separated by 1.5 mm thick air space. 1. Calculate the rate of heat loss through the jacket. 2. Compared the heat loss through a jackets without the air space. 3. Calculate the equivalent thickness of a wool coat, which has same total heat resistances of the synthetic fabric. Given: The thermal conductivities are given to be k = 0.13 W/m-°C for synthetic fabric, k = 0.026 W/m-°C for air, and k = 0.035 W/m °C for wool fabric, area of heat transfer 1.1 m², T1 = 28 °C, To = (-5°C), and air heat transfer coefficient 25 W/m². C. 43) Assumptions: المراة المرحلة من الخارج 1 Heat transfer is steady since there is no indication of change with time. 2 Heat transfer through the jacket is one-dimensional. 3 Thermal conductivities are constant. 4 Heat transfer coefficients account for the radiation heat transfer. 12
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