In the period of sharp warming conditions can occur in which the temperature of the outer surface for some time will be below the ambient air temperature. While warmer ambient air, not in contact with the heated surface of the wall may cause condensation on the surface. The article discusses some of the exterior building envelope, in conditions of rapid warming and condensation process of moisture on the outer surface of the walls. With the help of finite difference method numerical modeling of the thermal regime of the outer surface.

Keywords: Exterior walls, non-stationary conditions, moisture condensation, winter

The article discusses the influence of the distance between the axes of pipes laid on the efficiency of the temperature distribution in the floor heating system. Using the computational experiment was simulated the temperature field on the surface of the floor heating. The calculations are performed using the program ELCUT.

Keywords: underfloor heating, numerical simulation, temperature field, the temperature of the feed piping system radiant heating

For the region South of Russia is characterized by abrupt changes of temperature in winter. In the normative literature focuses on how the stationary thermal regime. Not enough investigated how it will affect the thermal design of building envelopes of a sharp increase in outdoor temperature. The paper considers the dynamic change of the temperature distribution of the outer walling for the conditions of rapid warming during winter on the example of enclosing structures made of different materials.

Keywords: dynamic analysis, building walls,temperature distribution, winter conditions

The wide distribution systems radiant panel heating in floor heating in wet areas, allows to increase comfort. Part of the thermal energy will increase the rate of evaporation from wetted surfaces. The article describes mathematical model and algorithm of calculation of the temperature field of the surface subject to evaporation. In the paper numerical experiment to analyze the efficiency of the distribution system temperature floor heating in wet areas.

Keywords: The evaporation of moisture from the surface, phase transition, Underfloor heating, wet rooms, temperature field

The article provides the analysis of the operational cost of the systems of heating of a building with the use of низкопотенциальных sources of heat. Analyzed fuel economy with consideration of the operation of the heat pump and save operating costs.

 

Keywords: heat pumps, heat mine waters, the saving of operating costs