Question: 2. It is necessary to insulate a flat surface so that the rate of heat loss per unit area of this surface does not

2. It is necessary to insulate a flat surface so that the

2. It is necessary to insulate a flat surface so that the rate of heat loss per unit area of this surface does not exceed 450 W/m?. The temperature difference across the insulating layer is 400K. Evaluate the thickness of insulation if (a) the insulation is made of asbestos cement having thermal conductivity of 0.11 W/(m.K) (b) the insulation is made of fire clay having thermal conductivity of 0.84 W/(m.K).

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