Consider a jacket made of five layers of 0.1-mm-thick synthetic fabric (k = 0.13 W/m °C) with 1.5-mm-thick air space (k = 0.026 W/m °C) between the layers. Assuming the inner surface temperature of the jacket to be 28 °C and the surface area to be 1.1 m², determine the rate of heat loss through the jacket when the temperature of the outdoors is -5°C and the heat transfer coefficient at the outer surface is 25 W/m². °C. What would your response be if the jacket is made of a single layer of 0.5-mm-thick synthetic fabric?
Consider a jacket made of five layers of 0.1-mm-thick synthetic fabric (k = 0.13 W/m °C) with 1.5-mm-thick air space (k = 0.026 W/m °C) between the layers. Assuming the inner surface temperature of the jacket to be 28 °C and the surface area to be 1.1 m², determine the rate of heat loss through the jacket when the temperature of the outdoors is -5°C and the heat transfer coefficient at the outer surface is 25 W/m². °C. What would your response be if the jacket is made of a single layer of 0.5-mm-thick synthetic fabric?
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter1: Basic Modes Of Heat Transfer
Section: Chapter Questions
Problem 1.1DP
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![Consider a jacket made of five layers of 0.1-mm-thick synthetic fabric (k = 0.13 W/m-°C) with
1.5-mm-thick air space (k = 0.026 W/m °C) between the layers. Assuming the inner surface
temperature of the jacket to be 28 °C and the surface area to be 1.1 m², determine the rate of heat
loss through the jacket when the temperature of the outdoors is -5°C and the heat transfer
coefficient at the outer surface is 25 W/m².°C.
What would your response be if the jacket is made of a single layer of 0.5-mm-thick synthetic
fabric?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fde36129f-10d5-47c2-b231-a948fa643da5%2Fe2ef1b0b-36c1-4933-9304-64de9b7928eb%2Fuircdli_processed.png&w=3840&q=75)
Transcribed Image Text:Consider a jacket made of five layers of 0.1-mm-thick synthetic fabric (k = 0.13 W/m-°C) with
1.5-mm-thick air space (k = 0.026 W/m °C) between the layers. Assuming the inner surface
temperature of the jacket to be 28 °C and the surface area to be 1.1 m², determine the rate of heat
loss through the jacket when the temperature of the outdoors is -5°C and the heat transfer
coefficient at the outer surface is 25 W/m².°C.
What would your response be if the jacket is made of a single layer of 0.5-mm-thick synthetic
fabric?
![2. Clothing made of several thin layers of fabric with trapped air in between, often called ski
clothing, is commonly used in cold climates because it is light, fashionable, and a very effective
thermal insulator. So it is no surprise that such clothing has largely replaced thick and heavy old-
fashioned coats.
Multilayered
ski jacket
REBUT](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fde36129f-10d5-47c2-b231-a948fa643da5%2Fe2ef1b0b-36c1-4933-9304-64de9b7928eb%2Fp6hh0p1d_processed.png&w=3840&q=75)
Transcribed Image Text:2. Clothing made of several thin layers of fabric with trapped air in between, often called ski
clothing, is commonly used in cold climates because it is light, fashionable, and a very effective
thermal insulator. So it is no surprise that such clothing has largely replaced thick and heavy old-
fashioned coats.
Multilayered
ski jacket
REBUT
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