THE HEAT BALANCE FOR EXTERNAL COMPOSITE WALLS

Abstract

One of the first steps in reducing energy consumption for heating and cooling buildings is developing of thermal insulation envelope of building. Nowadays contemporary walls have constructions composed from different layers – which make composite structures. We have developed model of the heat balance and based on that model simulation that could analyze and determine the heat balance and temperature distribution inside the buildings in dependence from external conditions and temperature distribution inside the walls and on their boundaries between different layers. All cases represents passive isolation, where the heat balance depend only on materials characteristics, on their heat transfer coefficients, thermal conductance properties and thickness of used materials. For various combinations of today available construction and insulating materials, we have calculated the overall coefficients of heat transmission. Our calculations confirm advantage of usage hollow bricks instead solid bricks, and placing insulation layers on the outer side of walls. Furthermore, those simulations will serve as test for the wider project of the dynamic heat flow experiments in general structures and among them in nanostructures as well.