Q7/ The maximum operating temperature of a kitchen oven is set at 310°C. Due to seasonal variations, the kitchen temperature may vary from 12° C to 32 °C. If the average heat transfer coefficient between the outside oven surface and kitchen air is 12 W/ m2°C, determine the necessary thickness of fibre glass (k = 0.036 W/m°C) insulation to %3D ensure that the outside surface temperature of oven does not exceed 45°C. Assume that the steady state conditions prevail and the thermal resistance of metal wall is negligible.

Q7/ The maximum operating temperature of a kitchen oven is set at 310°C. Due to seasonal variations, the kitchen temperature may vary from 12° C to 32 °C. If the average heat transfer coefficient between the outside oven surface and kitchen air is 12 W/ m2°C, determine the necessary thickness of fibre glass (k = 0.036 W/m°C) insulation to %3D ensure that the outside surface temperature of oven does not exceed 45°C. Assume that the steady state conditions prevail and the thermal resistance of metal wall is negligible.

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.

Chapter2: Steady Heat Conduction

Section: Chapter Questions

Problem 2.32P

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Question

Q7/ The maximum operating
temperature of a kitchen oven is set
at 310°C. Due to seasonal variations,
the kitchen temperature may vary
from 12° C to 32 °C. If the average
heat transfer coefficient between
the outside oven surface and
kitchen air is 12 W/ m2°C, determine
the necessary thickness of fibre
glass (k = 0.036 W/m°C) insulation to
ensure that the outside surface
temperature of oven does not
exceed 45°C. Assume that the
steady state conditions prevail and
the thermal resistance of metal wall
is negligible.

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