THERMAL SCIENCE

International Scientific Journal

Miloš J. Banjac

,

Maja Todorović

,

Milan R. Ristanović

,

Radoslav D. Galić

EXPERIMENTAL DETERMINATION OF THERMAL CONDUCTIVITY OF SOIL WITH A THERMAL RESPONSE TEST

ABSTRACT
Optimal design of a borehole heat exchanger, as the outer part of a ground source heat pump heating system, requires information on the thermal properties of the soil. Those data, the effective thermal conductivity of the soil λeff and the average temperature of the soil T0, enable us to determine the necessary number and depth of boreholes. The determination of thermal conductivity of the soil in laboratory experiments does not usually coincide with the data under in-situ conditions. Therefore, an in-situ method of experimental determination of these parameters, the so-called thermal response test, is presented in this paper. In addition to the description of the experimental procedure and installation overview, the paper describes methods based on theory and presents their basic limitations, through the presentation of experimental data. [Acknowledgment. This paper is made in a scope of the project TR 33047 “Intelligent climate control systems to achieve energy efficient regime in the complex conditions of exploitation” funded by the Ministry of Education and Science of the Republic of Serbia.]
KEYWORDS
thermal response test, thermal conductivity of soil, dimensioning of borehole heat exchanger
PAPER SUBMITTED: 2010-06-27
PAPER REVISED: 2012-05-01
PAPER ACCEPTED: 2012-05-02
DOI REFERENCE: https://doi.org/10.2298/TSCI100627156B
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2012, VOLUME 16, ISSUE Issue 4, PAGES [1117 - 1126]
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Experimental determination of thermal conductivity of soil with a thermal response test

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence