Poro-hydro-thermal Analyses of Heat Transport in the Limestone Around the District Heating Tunnel in Copenhagen
نویسنده
چکیده
The temperature field evolving in the limestone around the district heating tunnel in Copenhagen due to operation of the long-distance heating pipelines is investigated by means of poro-hydro-thermal numerical analyses. The presented parametric studies illustrate the coupling between the temperature and the groundwater flow. It is shown how a general horizontal groundwater flow and the hydraulic permeability of the surrounding ground influence the distribution and magnitude of the temperature. The results of the study can be generalised and indicate in which situations a pure conduction analysis without consideration of pore water flow is adequate and when a full conduction/convection analysis is necessary to obtain realistic results for the temperature field around heated tunnels. The significance of the temperature elevation for the structural design of the segmental tunnel lining is highlighted.
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