MATEC Web Conf.
Volume 337, 2021PanAm-Unsat 2021: 3rd Pan-American Conference on Unsaturated Soils
|Number of page(s)||8|
|Section||Fundamentals and Experimental Investigations|
|Published online||26 April 2021|
Thermal properties of a tropical unsaturated soil
University of São Paulo at São Carlos, Departament of Geotechnical Engineering, Av. Trabalhador Sancarlense, 400, São Carlos, SP, 13566–590, Brazil.
* Corresponding author: firstname.lastname@example.org
Ground thermal properties, especially the thermal conductivity, are of paramount importance for the design of ground source heat pump systems (GSHP), used for space heating and cooling. However, very little information, if any, are available from the thermal characteristics of tropical unsaturated soils related to the GSHP application. To evaluate the thermal behaviour of a typical Brazilian tropical unsaturated soil, an extensive experimental investigation was conducted at the test site of the University of Sao Paulo at São EESC/USP) comprising Carlos (a detailed soil characterization; field monitoring of the seasonal groundwater table variation; soil and ambient temperatures, and matric suction of the top soil. This paper describes the investigation program and compares the thermal soil properties as measured in laboratory and field thermal response tests. The results were variable depending on the testing techniques; however, all results showed that the soil thermal conductivity is strongly influenced by the degree of saturation of the soil.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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