Effects of drying and shrinkage on the mechanical performance of unsaturated fine/medium- grained soils used as heat storage media
Studying the mechanical behavior of heat storage media is vital in the safety and design of most sensible and borehole thermal energy storage systems, which are normally built as part of the sub-structure of buildings with load bearing capabilities. In spite of its importance on the efficiency and p...
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2021-01-01
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Online Access: | https://www.matec-conferences.org/articles/matecconf/pdf/2021/06/matecconf_PanAm-Unsat2021_01022.pdf |
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doaj-f8f02f7073d446f79a549497e50080772021-05-04T12:21:53ZengEDP SciencesMATEC Web of Conferences2261-236X2021-01-013370102210.1051/matecconf/202133701022matecconf_PanAm-Unsat2021_01022Effects of drying and shrinkage on the mechanical performance of unsaturated fine/medium- grained soils used as heat storage mediaHailemariam Henok0Wuttke Frank1Geomechanics and Geotechnics, Kiel UniversityGeomechanics and Geotechnics, Kiel UniversityStudying the mechanical behavior of heat storage media is vital in the safety and design of most sensible and borehole thermal energy storage systems, which are normally built as part of the sub-structure of buildings with load bearing capabilities. In spite of its importance on the efficiency and performance of heat energy storage systems, the mechanical stability and behavior of heat storage materials, mainly at elevated temperatures, has not been given adequate attention in past studies. On this regard, the mechanical behavior of three unsaturated fine- and medium- grained soils from Germany is studied at elevated temperatures, in view of using the soils as a solid sensible heat storage media. The results show a significant dependence of the mechanical behavior of the investigated soils on moisture content and temperature. Furthermore, an increase in shrinkage of the soil specimens with a decrease in the texture of the soils was observed during heating of the soils. The shrinkage behavior is also corroborated with the formation of minor and moderate tensile desiccation cracks of the specimens, which when unaccounted for can result in the lowering of the heat conduction of the heat storage medium, thus lowering the efficiency of the heat storage system.https://www.matec-conferences.org/articles/matecconf/pdf/2021/06/matecconf_PanAm-Unsat2021_01022.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hailemariam Henok Wuttke Frank |
spellingShingle |
Hailemariam Henok Wuttke Frank Effects of drying and shrinkage on the mechanical performance of unsaturated fine/medium- grained soils used as heat storage media MATEC Web of Conferences |
author_facet |
Hailemariam Henok Wuttke Frank |
author_sort |
Hailemariam Henok |
title |
Effects of drying and shrinkage on the mechanical performance of unsaturated fine/medium- grained soils used as heat storage media |
title_short |
Effects of drying and shrinkage on the mechanical performance of unsaturated fine/medium- grained soils used as heat storage media |
title_full |
Effects of drying and shrinkage on the mechanical performance of unsaturated fine/medium- grained soils used as heat storage media |
title_fullStr |
Effects of drying and shrinkage on the mechanical performance of unsaturated fine/medium- grained soils used as heat storage media |
title_full_unstemmed |
Effects of drying and shrinkage on the mechanical performance of unsaturated fine/medium- grained soils used as heat storage media |
title_sort |
effects of drying and shrinkage on the mechanical performance of unsaturated fine/medium- grained soils used as heat storage media |
publisher |
EDP Sciences |
series |
MATEC Web of Conferences |
issn |
2261-236X |
publishDate |
2021-01-01 |
description |
Studying the mechanical behavior of heat storage media is vital in the safety and design of most sensible and borehole thermal energy storage systems, which are normally built as part of the sub-structure of buildings with load bearing capabilities. In spite of its importance on the efficiency and performance of heat energy storage systems, the mechanical stability and behavior of heat storage materials, mainly at elevated temperatures, has not been given adequate attention in past studies. On this regard, the mechanical behavior of three unsaturated fine- and medium- grained soils from Germany is studied at elevated temperatures, in view of using the soils as a solid sensible heat storage media. The results show a significant dependence of the mechanical behavior of the investigated soils on moisture content and temperature. Furthermore, an increase in shrinkage of the soil specimens with a decrease in the texture of the soils was observed during heating of the soils. The shrinkage behavior is also corroborated with the formation of minor and moderate tensile desiccation cracks of the specimens, which when unaccounted for can result in the lowering of the heat conduction of the heat storage medium, thus lowering the efficiency of the heat storage system. |
url |
https://www.matec-conferences.org/articles/matecconf/pdf/2021/06/matecconf_PanAm-Unsat2021_01022.pdf |
work_keys_str_mv |
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