Thermal Bridge Heat Transfer & Vapour Diffusion Simulation Program AnTherm Version 6.115 - 10.137

[ ← ] [ ↑ ] [ → ] [ToC]

On the Storage of Heat in Building Components

Examining heat storage in building construction materials and assemblies - often referred to as thermal storage - by means of a periodically oscillating model of thermal conduction leads to a generalized conductance concept (complex conductance matrices). This concept can serve as the basis for three- dimensional, non-steady-state (transient) calculations of the thermal performance of buildings. Relationships to the concept of effective thermal capacity (previously introduced in other publications) are established in context.
...

A correct treatment of heat storage processes in building structures is only possible by means of a thorough examination of relevant time-dependant heat flows. The concept presented here is only seemingly restricted to periodically fluctuating processes since a generalization which incorporates aperiodic functions as well is principally  possible with the use of Laplace transforms.

The segment of this discourse most relevant to the practical application of evaluating a building's thermal performance is the generalization of the already familiar conduction value concept for steady-state conditions to include periodically time-dependant conditions as well. This provides the basis for calculating the thermal performance of entire buildings in which two- and three-dimensional heat conduction is considered - without a serious increase in complications as compared to one-dimensional, time-dependant calculations.

Continue reading here:

 

The above essay has been incorporated with friendly permission from Klaus Kreč, Büro für Bauphysik, A-3562 Schönberg am Kamp, Veltlinerstr. 9, Österreich/Austria .

 

See also: Theoretical background


 Model, Calculate, Simulate and Analyse Thermal Heat Bridges in 2D and 3D with AnTherm®  

[ ← ] [ ↑ ] [ → ] [ToC

 Copyright © Kornicki Dienstleistungen in EDV & IT