A firefighter’s protective clothing, referred to as a turnout coat, is typically constructed as an ensemble of three layers separated by air gaps, as shown in the figure. Assume the air gaps are stagnant and heat is transferred by conduction. a) Represent the turnout coat by a thermal circuit, labeling all the thermal resistances with respective lengths and material properties. b) Calculate the total thermal resistance per unit area (m2-K/W) for the turnout coat. c) The typical radiant heat flux on the fire-side of the turnout coat is q" = 0.2 W/cm2. What is the outer surface temperature (°C) of the turnout coat if the inner surface temperature is 65°C, a condition that would result in burn injury?

A firefighter’s protective clothing, referred to as a turnout coat, is typically constructed as an ensemble of three layers separated by air gaps, as shown in the figure. Assume the air gaps are stagnant and heat is transferred by conduction. a) Represent the turnout coat by a thermal circuit, labeling all the thermal resistances with respective lengths and material properties. b) Calculate the total thermal resistance per unit area (m2-K/W) for the turnout coat. c) The typical radiant heat flux on the fire-side of the turnout coat is q" = 0.2 W/cm2. What is the outer surface temperature (°C) of the turnout coat if the inner surface temperature is 65°C, a condition that would result in burn injury?

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.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.36P

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