A solid concrete wall 4.0 m by 2.4 m and 30 cm thick, with a thermal conductivity of 1.3 W/(m∙K), separates a basement at 18°C from the ground outside at 6°C. Under steady state conditions, how much heat flows through the wall in one hour?

Question

Quizplus · Accepted Answer

The heat flow through the wall can be calculated using the formula Q = (k * A * ΔT * t) / d, where k is the thermal conductivity, A is the area, ΔT is the temperature difference, t is the time, and d is the thickness. Substituting the given values, Q = (1.3 W/(m∙K) * 9.6 m² * 12 K * 3600 s) / 0.3 m = 1.8 MJ.

A Solid Concrete Wall 4