Transient Heat Transfer at the Building-ground Boundary

The heat flow-rate transferred through the ground represents an important rate of the heat flow-rate dissipated to the outside by the buildings, mainly by the low ones. The buildings architectural solutions associated to the structural solutions, meant to carry out buildings with a low energy consumption used by the thermal utilities (heating / cooling) emphasize the impact of the building – ground boundary on the building thermal response. This article presents a hybrid calculation model of the ground thermal response to the indoor and outdoor random thermal loads, based on the combining the model specific to the steady-state solution by the conforming transformations method used in the case of the previously mentioned boundary and the Unitary Thermal Response (RTU) method specific to the impulse thermokinetics used in the case of virtual similar environments operating as a model, which substitutes the real environment (ground).