Задача 20357.

A concrete wall has dimensions:. Length - 5 m, height - 2.7 m, thickness - 70 cm Calculate the heat flow when the internal temperature of the wall - 20 ° C, and the outer - -10 ° C Determine the amount of heat through the wall of the outgoing 1 s and 1 h. rating capacity of the heat source required to heat loss compensation. The thermal conductivity of concrete of 1.3 W / m * K.

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