A cold store has a wall comprising 11 cm of brick on the outside, then 7.5 cm of concrete and then 10 cm of cork. The mean temperature within the store is maintained at -18°C and the mean temperature of the outside surface of the wall is 18°C. Calculate the rate of heat transfer through the wall. The appropriate thermal conductivities are for brick, concrete and cork, respectively 0.69, 0.76 and 0.043 J m-1 s-1 °C-1. Determine also the temperature at the interfaces between the concrete and cork layers, and the brick and concrete layers.

Question-Answer › Category: Heat And Mass Transfer › A cold store has a wall comprising 11 cm of brick on the outside, then 7.5 cm of concrete and then 10 cm of cork. The mean temperature within the store is maintained at -18°C and the mean temperature of the outside surface of the wall is 18°C. Calculate the rate of heat transfer through the wall. The appropriate thermal conductivities are for brick, concrete and cork, respectively 0.69, 0.76 and 0.043 J m-1 s-1 °C-1. Determine also the temperature at the interfaces between the concrete and cork layers, and the brick and concrete layers.

0 Vote Up Vote Down

Sumit Kumar asked 1 year ago

A cold store has a wall comprising 11 cm of brick on the outside, then 7.5 cm of concrete and then 10 cm of
cork. The mean temperature within the store is maintained at -18°C and the mean temperature of the outside
surface of the wall is 18°C.
Calculate the rate of heat transfer through the wall. The appropriate thermal conductivities are for brick,
concrete and cork, respectively 0.69, 0.76 and 0.043 J m-1 s-1 °C-1.
Determine also the temperature at the interfaces between the concrete and cork layers, and the brick and
concrete layers.

Question Tags: Heat and mass transfer