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Characterisation of ground thermal and thermo-mechanical behaviour for shallow geothermal energy applications

Vieira, Ana; Alberdi-Pagola, Maria; Christodoulides, Paul; Javed, Saqib LU ; Loveridge, Fleur; Nguyen, Frederic; Cecinato, Francesco; Maranha, João; Florides, Georgios and Prodan, Iulia, et al. (2017) In Energies 10(12).
Abstract

Increasing use of the ground as a thermal reservoir is expected in the near future. Shallow geothermal energy (SGE) systems have proved to be sustainable alternative solutions for buildings and infrastructure conditioning in many areas across the globe in the past decades. Recently novel solutions, including energy geostructures, where SGE systems are coupled with foundation heat exchangers, have also been developed. The performance of these systems is dependent on a series of factors, among which the thermal properties of the soil play a major role. The purpose of this paper is to present, in an integrated manner, the main methods and procedures to assess ground thermal properties for SGE systems and to carry out a critical review of... (More)

Increasing use of the ground as a thermal reservoir is expected in the near future. Shallow geothermal energy (SGE) systems have proved to be sustainable alternative solutions for buildings and infrastructure conditioning in many areas across the globe in the past decades. Recently novel solutions, including energy geostructures, where SGE systems are coupled with foundation heat exchangers, have also been developed. The performance of these systems is dependent on a series of factors, among which the thermal properties of the soil play a major role. The purpose of this paper is to present, in an integrated manner, the main methods and procedures to assess ground thermal properties for SGE systems and to carry out a critical review of the methods. In particular, laboratory testing through either steady-state or transient methods are discussed and a new synthesis comparing results for different techniques is presented. In situ testing including all variations of the thermal response test is presented in detail, including a first comparison between new and traditional approaches. The issue of different scales between laboratory and in situ measurements is then analysed in detail. Finally, the thermo-hydro-mechanical behaviour of soil is introduced and discussed. These coupled processes are important for confirming the structural integrity of energy geostructures, but routine methods for parameter determination are still lacking.

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publication status
published
subject
keywords
In situ testing, Laboratory testing, Shallow geothermal systems, Soil thermal behaviour, Thermo-mechanical behaviour
in
Energies
volume
10
issue
12
publisher
MDPI AG
external identifiers
  • scopus:85037115583
ISSN
1996-1073
DOI
10.3390/en10122044
language
English
LU publication?
yes
id
88835c8b-2240-49ed-a7d0-3352af77e144
date added to LUP
2017-12-21 11:10:31
date last changed
2018-01-07 12:29:34
@article{88835c8b-2240-49ed-a7d0-3352af77e144,
  abstract     = {<p>Increasing use of the ground as a thermal reservoir is expected in the near future. Shallow geothermal energy (SGE) systems have proved to be sustainable alternative solutions for buildings and infrastructure conditioning in many areas across the globe in the past decades. Recently novel solutions, including energy geostructures, where SGE systems are coupled with foundation heat exchangers, have also been developed. The performance of these systems is dependent on a series of factors, among which the thermal properties of the soil play a major role. The purpose of this paper is to present, in an integrated manner, the main methods and procedures to assess ground thermal properties for SGE systems and to carry out a critical review of the methods. In particular, laboratory testing through either steady-state or transient methods are discussed and a new synthesis comparing results for different techniques is presented. In situ testing including all variations of the thermal response test is presented in detail, including a first comparison between new and traditional approaches. The issue of different scales between laboratory and in situ measurements is then analysed in detail. Finally, the thermo-hydro-mechanical behaviour of soil is introduced and discussed. These coupled processes are important for confirming the structural integrity of energy geostructures, but routine methods for parameter determination are still lacking.</p>},
  articleno    = {2044},
  author       = {Vieira, Ana and Alberdi-Pagola, Maria and Christodoulides, Paul and Javed, Saqib and Loveridge, Fleur and Nguyen, Frederic and Cecinato, Francesco and Maranha, João and Florides, Georgios and Prodan, Iulia and Van Lysebetten, Gust and Ramalho, Elsa and Salciarini, Diana and Georgiev, Aleksandar and Rosin-Paumier, Sandrine and Popov, Rumen and Lenart, Stanislav and Poulsen, Søren Erbs and Radioti, Georgia},
  issn         = {1996-1073},
  keyword      = {In situ testing,Laboratory testing,Shallow geothermal systems,Soil thermal behaviour,Thermo-mechanical behaviour},
  language     = {eng},
  month        = {12},
  number       = {12},
  publisher    = {MDPI AG},
  series       = {Energies},
  title        = {Characterisation of ground thermal and thermo-mechanical behaviour for shallow geothermal energy applications},
  url          = {http://dx.doi.org/10.3390/en10122044},
  volume       = {10},
  year         = {2017},
}