HEAT TRANSFER IN SOIL FOUNDATIONS OF BUILDINGS. IMPACT OF INSULATED BLIND AREA

In low-rise construction, heat losses to soil foundations are of great importance in the heat balance. For a number of technical reasons, this subject is not well understood. The paper proposes a physical-mathematical and numerical method for calculating unsteady heat transfer, which takes into account outside temperature year changing. A model for calculating heat losses in groundwater is proposed. The numerical model is based on the use of an explicit two-step-in-time, highly stable finite difference computational method. The objects of the study are unheated and heated building with a foundation like a slab on the ground. The effect of insulated blind area on the temperature field under the building and heat loss to the ground is considered. The role of thermal resistance of the blind area and its geometric size is shown.