Application of the Method of Dimensional Characteristics to the Calculation of the Humidity Mode of Multi-Layered Enclosing Building Structures

Abstract

The implementation of the energy saving program in construction, adopted in the Russian Federation, has led to a signifi cant change in the design decisions of building envelopes. To achieve the normative values of heat transfer resistance, various facade systems are currently widely used for insulation of external walls using polymeric materials as heaters, which have low values of the coeffi cient of thermal conductivity with a relatively high value of the coeffi cient of vapor permeability. Therefore, when choosing a textured layer of facade systems, it is necessary to take into account the value of its resistance to diff usion of water vapor in order to avoid the accumulation of moisture in the outer walls. The problem associated with the possible accumulation of moisture is especially relevant when designing both three-layer exterior walls and walls with internal insulation. To eliminate the formation of molds on the inner surfaces of the enclosing structures, leading to dangerous diseases of skin and respiratory tract organs, as well as the destruction of building structures, it is necessary to accurately calculate the humidity mode of the enclosing structures in order to protect them from overmoistening. The article presents a methodology for determining the position of the plane of possible condensation in multilayer enclosing structures, based on the use of the dimensionless characteristics method.

Features of calculation of heat consumption for heating energy-efficient buildings

“…Теплотехнические расчеты строительных ограждающих конструкций выполнялись по методике, изложенной в СП 50.13330.2012, а расчеты влажностного режима -с помощью метода безразмерных характеристик [4].…”