Study of spatial heat transfer in a corner fragment of an external fence with connectors

About the authors:

Elena A. Ivanova, Senior Lecturer, Department of Heat and Gas Supply and Engineering Systems in Construction, Tomsk State University of Architecture and Building; energosber_e@mail.ru

Nikita V. Mescheulov, Cand. Sci. (Tech.), Associate Professor, Department of Applied Mathematics, Tomsk State University of Architecture and Building; nikita.mesheulov@mail.ru

Abstract:

Increasing energy efficiency and reducing heat loss in buildings are the main challenges of the modern construction sector. For this reason, it is recommended to design buildings using modern energy-saving materials and technologies. When using multilayer walls in housing construction, the problem of thermal bridges arises. Therefore, you need to understand how the thermal behavior of the enclosing structure changes when thermal engineering inhomogeneities are included in it.

The aim of this work is to study the effect of heat-conducting inclusions located in external enclosing structures on the change in the values of temperature and heat flux density.

The paper considers the importance of increasing the energy efficiency of outdoor fences. A numerical study of the heat transfer process for corner fragments of enclosing structures used in housing construction using the VELOX technology has been carried out. The influence of the design features of the considered corner fragments on the characteristics of temperature fields is shown.

Mathematical modeling of spatial heat transfer in the corner fragment of the outer enclosure is carried out using a nonlinear system of differential equations of heat conduction with specified boundary conditions using the finite element method. The problem was solved using the ANSYS software package.

The influence of metal and fiberglass connectors on the change in the fields of temperature and heat flux density in the enclosing structure has been investigated. The change in the thermal state is considered both in the thickness of the outer wall and along the inner surface of the fence from the corner area and along the smooth surface of the wall. Analysis of the calculations showed that the maximum disturbance is introduced by the connector made of metal, and the minimum — from fiberglass. The presence of highly heat-conducting inclusions in the thickness of the structure leads to a distortion of the density field of the heat flux of the fence.

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