Serial Laboratory Effective Thermal Conductivity Measurements of Cohesive and Non-cohesive Soils for the Purpose of Shallow Geothermal Potential Mapping and Databases—Methodology and Testing Procedure Recommendations
| Autor: | Grzegorz Ryżyński, Aleksandra Łukawska, Mateusz Żeruń |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Control and Optimization
geological mapping and databases low enthalpy geothermal energy ground source heat exchangers 020209 energy 0211 other engineering and technologies Compaction Energy Engineering and Power Technology 02 engineering and technology computer.software_genre lcsh:Technology Thermal conductivity 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Engineering (miscellaneous) Water content Geothermal gradient transient line source method 021101 geological & geomatics engineering Database Moisture lcsh:T Renewable Energy Sustainability and the Environment business.industry Geothermal energy Bulk density thermal properties of soil Soil water Environmental science business computer Energy (miscellaneous) |
| Zdroj: | Energies; Volume 13; Issue 4; Pages: 914 BASE-Bielefeld Academic Search Engine Energies, Vol 13, Iss 4, p 914 (2020) |
| ISSN: | 1996-1073 |
| DOI: | 10.3390/en13040914 |
| Popis: | The article presents the methodology of conducting serial laboratory measurements of thermal conductivity of recompacted samples of cohesive and non-cohesive soils. The presented research procedure has been developed for the purpose of supplementing the Engineering–Geology Database and its part–Physical and Mechanical Properties of Soils and Rocks (abbr. BDGI-WFM) with a new component regarding thermal properties of soils. The data contained in BDGI-WFM are the basis for the development of maps and plans for the assessment of geothermal potential and support for the sustainable development of low enthalpy geothermal energy. Effective thermal conductivity of soils was studied at various levels of water saturation and various degrees of compaction. Cohesive soils were tested in initial moisture content and after drying to a constant mass. Non-cohesive soils were tested in initial moisture, fully saturated with water and after drying to a constant mass. Effective thermal conductivity of non-cohesive soils was determined on samples mechanically compacted to the literature values of bulk density. Basic physical parameters were determined for each of the samples. In total, 120 measurements of thermal conductivity were carried out, for the purposes of developing the guidelines which allowed statistical analysis of the results. The results were cross-checked with different measuring equipment and with the literature data. |
| Databáze: | OpenAIRE |
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