Calculation of Building Heat Losses through Slab-on-Ground Structures Based on Soil Temperature Measured In Situ

Iwona Pokorska-Silva, Marta Kadela, Bożena Orlik-Kożdoń and Lidia Fedorowicz
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Iwona Pokorska-Silva: Faculty of Civil Engineering, Silesian University of Technology, 44-100 Gliwice, Poland
Marta Kadela: Building Research Institute (ITB), 00-611 Warsaw, Poland
Bożena Orlik-Kożdoń: Faculty of Civil Engineering, Silesian University of Technology, 44-100 Gliwice, Poland
Lidia Fedorowicz: Civil Engineering and Applied Arts, Faculty of Architecture, University of Technology, 40-555 Katowice, Poland

Energies, 2021, vol. 15, issue 1, 1-19

Abstract: The article aims to assess the effects of soil temperature measured in situ on the heat loss analyses of a building. Numerical analyses and in situ measurements of soil temperature profiles for real conditions under a residential building (profile I) in Poland and under the area outside the building (profile II) were performed. Based on the measurement results, a proprietary geometric model of the partition was proposed. The heat flux and heat flow results obtained for reliable models are 4.9% and 6.9% higher compared to a model based on a typical meteorological year for the wall–foundation system and 10.0% and 10.1% higher for the slab-on-ground structure for profile I. The adoption of temperatures from the area outside the building as the boundary condition (profile II) results in greater differences between the obtained results. The difference in heat flow obtained in the numerical analyses for profiles I and II is about 2 W/m 2 , both for the wall–foundation system and for the slab-on-ground structure calculations. The adoption of temperatures for the ground outside the building led to overestimation in the heat flux calculations, this being due to lower temperatures in these particular layers of the ground.

Keywords: ground temperature; ground profile; temperature measurement; heat flux; heat loss (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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