The walls of an oven are made from steel sheets with insulating board between them of thermal conductivity 0.18 J m-1 s-1 °C-1. If the maximum internal temperature in the oven is 300°C and the outside surface of the oven wall must not rise above 50°C, estimate the minimum necessary thickness of insulation assuming surface heat transfer coefficients to the air on both sides of the wall are 15 J m-2 s-1 °C-1. Assume the room air temperature outside the oven to be 25°C and that the insulating effect of the steel sheets can be neglected.

Question-Answer › Category: Heat And Mass Transfer › The walls of an oven are made from steel sheets with insulating board between them of thermal conductivity 0.18 J m-1 s-1 °C-1. If the maximum internal temperature in the oven is 300°C and the outside surface of the oven wall must not rise above 50°C, estimate the minimum necessary thickness of insulation assuming surface heat transfer coefficients to the air on both sides of the wall are 15 J m-2 s-1 °C-1. Assume the room air temperature outside the oven to be 25°C and that the insulating effect of the steel sheets can be neglected.

0 Vote Up Vote Down

Sumit Kumar asked 1 year ago

The walls of an oven are made from steel sheets with insulating board between them of thermal
conductivity 0.18 J m-1 s-1 °C-1. If the maximum internal temperature in the oven is 300°C and the outside
surface of the oven wall must not rise above 50°C, estimate the minimum necessary thickness of insulation
assuming surface heat transfer coefficients to the air on both sides of the wall are 15 J m-2 s-1 °C-1. Assume
the room air temperature outside the oven to be 25°C and that the insulating effect of the steel sheets can be
neglected.

Question Tags: Heat and mass transfer