The heat flux through a concrete slab 50mm thick, whose inner surface is at 50°C and outer at 20°C, is 60W/m². What is thermal conductivity of concrete?

 Heat and Mass transfer

1.

The heat flux through a concrete slab 50mm thick, whose inner surface is at 50°C and outer at 20°C, is 60W/m². What is thermal conductivity of concrete?

0.3W/m-°C

0.5W/m-° C

0.1W/m-° C

1W/m-°C

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