Heat loss to building foundations: An analysis based on a theory of dynamic thermal networks
Paper i proceeding, 2004

The calculation of heat flow in the ground, in particular the time-dependent heat loss through the foundation, poses particular problems due to three-dimensional flow and very long time scales. In this paper a new tool of analysis called “dynamic thermal networks” is presented briefly and used to analyze the time scales for the time-dependent heat loss for different types of foundations: a slab-on-ground, a cellar, and a split-level foundation. The heat loss may be divided into a transmittive and an absorptive component. The transmittive and absorptive step-response fluxes and the corresponding weighting functions provide a precise description of the time scales of the heat flow to the ground. It is shown that the transmittive component has time scales of a decade and even more, while the absorptive component has a time scale of days only.

Författare

Eva-Lotta Wentzel

Chalmers, Bygg- och miljöteknik

Johan Claesson

Chalmers, Bygg- och miljöteknik, Byggnadsteknologi

Thermal Performance of the Exterior Envelopes of Whole Buildings

21668469 (eISSN)

87

9th International Conference on Thermal Performance of Exterior Envelopes of Whole Buildings 2004
Clearwater, USA,

Ämneskategorier

Energiteknik

Annan fysik

Strömningsmekanik och akustik

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Senast uppdaterat

2021-05-05