Задача 20363.

A blank wall of a wooden house has the dimensions: length - 5 m, height - 3 m, thickness - 20 cm. Calculate the heat flux, if the internal temperature of the walls - + 20 ° C, and the outer - -30 ° C. Determine the amount of heat escaping through the wall for 1 s and 1 h. Rate output of the heat source required to compensate for heat loss. The thermal conductivity of wood 0.5 W / m * K.

Detailed solution shorthand terms, formulas, laws used in the decision, the withdrawal of the calculation formula and the response.

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