Development of models and analysis of temperature fields of new energy-saving enclosing structures with an air layer

Abstract

The author of the article propose new models of energy-saving envelope structures with air interlayers. To calculate the temperature fields in the enclosing structures they used the finite element modeling method in ANSYS environment. The authors analyzed the temperature fields at different variants of the outdoor temperature index. To calculate the temperature field in the envelope was used finite element model of the envelope, in which the influence of the ventilated air layer is replaced by the Convection type boundary condition with the temperature value. The result of the study is the analysis of temperature fields of new models of enclosures in different variants. So when analyzing the values of thermal resistance of traditional (scheme-1) and developed envelope structures (schemes 2-4) it was found that the thermal resistance of scheme-2 relative to the traditional scheme-1 value of thermal resistance at minimum temperature is 6.2 % higher. The authors also calculated by analogy the thermal resistance index at maximum temperature (4.5 %), at five days (5.8 %) and for the month of April (5.7 %). The analysis showed that scheme-2 is the most efficient of the new envelope schemes considered. In the comparative analysis of schemes - 3,4 with traditional scheme-1, the value of thermal resistance showed a negative effect. The authors determined that the temperature field is insignificantly different when using horizontal and vertical closed channels. The developed new energy-saving designs of external enclosure with air layer can be used in the design and construction of buildings, as well as in the teaching of relevant disciplines in universities.