Modelling vSGPs (very shallow geothermal potentials) in selected CSAs (case study areas)

Bertermann, David; Klug, Hermann; Morper-Busch, Lucia; Bialas, Christian

doi:10.1016/j.energy.2014.04.054

Cited by 35 publications

(43 citation statements)

References 55 publications

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“…The project followed the INSPIRE (INfrastructure for SPatial InfoRmation in Europe) guidelines, but a small amount of countries did not participate [7], which limited the level of accuracy and comprehensiveness. Another potential data set dealing with thermal conductivities of the underground would have been the outcomes of the European ThermoMap project [8]. Within this project, a pan-European outline map providing the very shallow geothermal potential (vSGP) was developed and expressed within ThermoMap-MapViewer [9].…”

Section: Data Acquisitionmentioning

confidence: 99%

Generalized Pan-European Geological Database for Shallow Geothermal Installations

et al. 2018

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The relatively high installation costs for different types of shallow geothermal energy systems are obstacles that have lowered the impact of geothermal solutions in the renewable energy market. In order to reduce planning costs and obtain a lithological overview of geothermal potentials and drilling conditions, a pan-European geological overview map was created using freely accessible JRC (Joint Research Centre) data and ArcGIS software. JRC data were interpreted and merged together in order to collect information about the expenditure of installing geothermal systems in specific geological set-ups, and thereby select the most economic drilling technique. Within the four-year project of the European Union’s Horizon 2020 Research and Innovation Program, which is known as “Cheap-GSHPs” (the Cheap and efficient application of reliable Ground Source Heat exchangers and Pumps), the most diffused lithologies and corresponding drilling costs were analyzed to provide a 1 km × 1 km raster with the required underground information. The final outline map should be valid throughout Europe, and should respect the INSPIRE (INfrastructure for SPatial InfoRmation in Europe) guidelines.

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Section: Data Acquisitionmentioning

confidence: 99%

Generalized Pan-European Geological Database for Shallow Geothermal Installations

et al. 2018

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“…This parameter has a huge impact on the economic efficiency of an installed very shallow geothermal system (Bertermann et al, 2014). Thermal conductivity is mainly driven by the texture respectively the structure of the soil body and its mineralogy within the first few meters of the ground (Logsdon et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…However, an effective determination of the different soil properties and the corresponding soil texture is crucial for a proper soil management. Regarding subsurface geothermal systems, a precise knowledge about the thermal conductivity and the water content of the soil is essential in order to make convenient recommendations on the feasibility of a planned geothermal project (Bertermann et al, 2014;2015;Dehner, 2007). A good knowledge and a wider understanding of the subsurface soil material and its exploration are important not only for shallow geothermal installations.…”

Section: Introductionmentioning

confidence: 99%

“…Amongst other factors like organic matter, the most relevant parameters are bulk density, soil moisture, and grain size distribution (AbuHamdeh, 2003;Abu-Hamdeh and Reeder, 2000;Farouki, 1981). Due to the comparatively few inlet parameters (Bertermann et al, 2014), one of the most commonly used formulas to determine the thermal conductivity (λ) are the Eqs (8), (9) according to Kersten (1949). The granulometry is considered within the two different formulas for soil under unfrozen conditions; one for sandy soil (Eq.…”

Section: Introductionmentioning

confidence: 99%

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Laboratory device to analyse the impact of soil properties on electrical and thermal conductivity

Bertermann¹,

Schwarz²

2017

International Agrophysics

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Gathering information about soil properties in an efficient way is essential for many soil applications also for very shallow geothermal systems (e.g. collector systems or heat baskets). In the field, electrical resistivity tomogramphy measurements enable non-invasive and extensive analyses regarding the determination of soil properties. For a better understanding of measured electrical resistivity values in relation to soil properties within this study, a laboratory setup was developed. The structure of this laboratory setup is geared to gather electrical resistivity or rather electrical conductivity values which are directly comparable to data measured in the field. Within this setup grain size distribution, moisture content, and bulk density, which are the most important soil parameters affecting the electrical resistivity, can be adjusted. In terms of a better estimation of the geothermal capability of soil, thermal conductivity measurements were also implemented within the laboratory test sequence. The generated data reveals the serious influence of the water content and also provides a huge impact of the bulk density on the electrical as well as on the thermal conductivity. Furthermore, different behaviour patterns of electrical and thermal conductivity in their particular relation to the different soil parameters could be identified.

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“…Bertermann [17,18] made a detailed study of the very first shallow layers (down to 10 m depth, very shallow geothermal potential vSGP), and created a WebGIS dynamic tool within the framework of the Thermomap Project. The method did not, however, consider seasonal changes in subsoil temperature due to heat flux variations.…”

Section: Introductionmentioning

confidence: 99%

Suitability Evaluation of Specific Shallow Geothermal Technologies Using a GIS-Based Multi Criteria Decision Analysis Implementing the Analytic Hierarchic Process

et al. 2018

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Abstract:The exploitation potential of shallow geothermal energy is usually defined in terms of site-specific ground thermal characteristics. While true, this assumption limits the complexity of the analysis, since feasibility studies involve many other components that must be taken into account when calculating the effective market viability of a geothermal technology or the economic value of a shallow geothermal project. In addition, the results of a feasibility study are not simply the sum of the various factors since some components may be conflicting while others will be of a qualitative nature only. Different approaches are therefore needed to evaluate the suitability of an area for shallow geothermal installation. This paper introduces a new GIS platform-based multicriteria decision analysis method aimed at comparing as many different shallow geothermal relevant factors as possible. Using the Analytic Hierarchic Process Tool, a geolocalized Suitability Index was obtained for a specific technological case: the integrated technologies developed within the GEOTeCH Project. A suitability map for the technologies in question was drawn up for Europe.

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Modelling vSGPs (very shallow geothermal potentials) in selected CSAs (case study areas)

Cited by 35 publications

References 55 publications

Generalized Pan-European Geological Database for Shallow Geothermal Installations

Generalized Pan-European Geological Database for Shallow Geothermal Installations

Laboratory device to analyse the impact of soil properties on electrical and thermal conductivity

Suitability Evaluation of Specific Shallow Geothermal Technologies Using a GIS-Based Multi Criteria Decision Analysis Implementing the Analytic Hierarchic Process

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