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dc.contributor.authorAli, Alexis*
dc.contributor.authorMohamed, Mostafa H.A.*
dc.contributor.authorAal, M.*
dc.contributor.authorSchellart, A.*
dc.contributor.authorTait, Simon J.*
dc.date.accessioned2016-11-23T18:21:07Z
dc.date.available2016-11-23T18:21:07Z
dc.date.issued2014
dc.identifier.citationAli A, Mohamed MHA, Aal M et al (2014) Thermal and hydraulic properties of sandy soils during drying and wetting cycles. In: GeoShanghai International Conference: New Frontiers in GeoTechnical Engineering. 26-28 May 2014, Shanghai, China: 129-138.
dc.identifier.urihttp://hdl.handle.net/10454/10579
dc.descriptionNo
dc.description.abstractThere is an increasing interest in the use of Ground Source Heat Pumps (GSHPs) as a source of renewable energy in temperate countries. GSHPs coupled with buried heat collectors can harness the thermal energy from near-surface soils to provide the heating required for domestic properties. The performance of a GSHP system depends greatly on the thermal conductivity of the surrounding soils. Near-surface soils undergo cycles of drying and wetting due to, for example, the infiltration of rain water and/or fluctuations of the ground water table. Several parameters - including the properties of soil, suction head and saturation history - affect the thermal properties as well as the retention and flow of water. This paper presents results from a comprehensive laboratory investigation on sand samples with markedly different grain size distribution. Simultaneous measurements of thermal and hydraulic properties of the sands were taken under incremental increase/decrease in the suction head values to simulate cycles of drying and wetting. The results clearly suggest that the thermal conductivity is better expressed as a function of the matric suction head so as to reflect the saturation history. There has been almost five-fold increase in the measured value of thermal conductivity when the soil was wetted to a residual degree of saturation from being dry.
dc.relation.isreferencedbyhttps://doi.org/10.1061/9780784413456.014
dc.subjectSandy soils; Thermal properties; Drying cycles; Wetting cycles
dc.titleThermal and hydraulic properties of sandy soils during drying and wetting cycles
dc.status.refereedYes
dc.typeConference Paper
dc.type.versionNo full-text available in the repository


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