A numerical and experimental investigation of ground heat transfer including edge insulation effects


Presents the results of an investigation of the thermal performance of a purpose-built, full-scale test house. States the work uses experimental results that explore heat losses from two similar rooms to the ground. One of the rooms has expanded polystyrene edge insulation placed 300mm below ground level. Thermocouples were used to measure temperature changes at 20 min. intervals over a 5 year period, beneath and adjacent to the test house. Performs a two-dimensional numerical simulation of the experiment. The results show that a relatively simple heat conduction analysis of the problem can yield acceptable accuracy. Good agreement was obtained between simulated and measured transient temperature variations. Phase lag of ground temperature variations was also accurately simulated. The results also show the impact of edge insulation on the heat flow paths around the building. Concludes that the method can be readily applied to estimate the thermal response of new designs, thus assisting with the aims of producing energy efficient buildings for the future.

Primary Author(s): Zhou Z, Rees S W, et al

Source: Bldg. Environ., January 2002, vol.37, no.1, 67-78, 16 figs, 1 tab, 25 refs.

             BSRIA Abstract Doc 000102855 Abs 20020043

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