Thermal conductivity measurement in clay dominant consolidated material by Transient Hot-Wire method.

Garnier, J. P.; Gallier, Jonathan; Mercx, B.; Dudoignon, P.; Milcent, D.

doi:10.1051/epjconf/20100638001

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…In contrast, clay soils or with a higher proportion of this material had lower conductivities. This is consistent with that reported by other researchers [24][25][26][27][28]. Sands and silts have a higher heat capacity than clays.…”

Section: Effect Of Soil Type On Thermal Propertiessupporting

confidence: 93%

Study of Thermal Inertia in the Subsoil Adjacent to a Civil Engineering Laboratory for a Ground-Coupled Heat Exchanger

Gutiérrez-Durán,

Cervantes,

López

et al. 2023

Energies

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This document presents a study of thermal inertia in the subsoil adjacent to the Civil Engineering laboratory of the Technological Institute of Sonora (ITSON) in the south of Sonora, Mexico, in service of the development of a solution proposal of a ground-coupled air heat exchanger for the cooling months. The research was divided into three phases: first, the monitoring of temperature in 10 layers of the ground; second, the analysis of thermal ground properties; and last, the design and simulation of a ground-coupled air heat exchanger. The objectives were to determine the variation in the thermal inertia of the soil with depth and over time and to determine the optimum depth for a ground-coupled heat exchanger system. The second objective was to develop a design proposal for a ground-coupled heat exchanger for the university laboratory. We found that the optimum depth is 3.0 m in a soil with high-compressibility clay with 21% humidity and 0.152 W/mK of thermal conductivity. However, the proposed design identified the best depth for the cooling system as 3 m considering a ground-coupled heat exchanger for a volume of 222.2 m3, corresponding to the volume of the classrooms of the building. With this design, the approach was to reduce the temperature by at least 10 °C on the hottest day (41 °C) of the year studied. We concluded that with this kind of system, the climate of the building studied could reduce the thermal load of active AC systems and reduce the energy load by 59%.

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Section: Effect Of Soil Type On Thermal Propertiessupporting

confidence: 93%

Study of Thermal Inertia in the Subsoil Adjacent to a Civil Engineering Laboratory for a Ground-Coupled Heat Exchanger

Gutiérrez-Durán,

Cervantes,

López

et al. 2023

Energies

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“…The fundamental thermal properties of the experimental soil were tested in XIATECH Company (Xi'an, China) and shown in Table 4. The density, thermal conductivity and specific heat capacity of soil were measured by using the method of cutting‐ring, 26 transient hot wire, 25 and differential scanning calorimeter, 27 respectively.…”

Section: Description Of Experimentsmentioning

confidence: 99%

Laboratory study on the thermal performance of vertical U‐tube ground heat exchanger during short‐term borehole thermal energy storage ( BTES ) and heat extraction process

Wang

Yang

et al. 2020

Int J Energy Res

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Summary To explore the thermal performance of vertical U‐tube ground heat exchanger (GHE) during short‐term thermal energy storage (TES) and heat extraction process, a novel and well‐controlled sandbox with a plate heat exchanger at the bottom of GHE was proposed and established. According to the experiments of short‐term TES and heat extraction under different inlet temperature with Re between 2677 and 2823, we found that the thermal performance of GHE was mainly determined by the dynamic soil temperature distribution around GHE, which was induced by the inlet temperature and operation process of GHE. Furthermore, the energy was concentrated within a limited radius (0.4 m) around the GHE during the 8 hours TES and heat extraction process, which was of benefit to the efficient operation of GHE and the thermal environment of soil. Moreover, compared to the simple extraction process C10 (−/8°C) without TES, the heat extraction process of C5 (35/8°C) obtained a 47.8% increase of average heat extraction rate. In addition, approximately 35% of the injected heat was left in the experimental soil under thermal balance conditions C3, C5, and C7. These results show the superiority and characteristic of short‐term TES and heat extraction for GHE operation.

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Modeling thermal conductivity of clays: A review and evaluation of 28 predictive models

Liu

Dyck

et al. 2021

Engineering Geology

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Thermal conductivity measurement in clay dominant consolidated material by Transient Hot-Wire method.

Cited by 3 publications

References 14 publications

Study of Thermal Inertia in the Subsoil Adjacent to a Civil Engineering Laboratory for a Ground-Coupled Heat Exchanger

Study of Thermal Inertia in the Subsoil Adjacent to a Civil Engineering Laboratory for a Ground-Coupled Heat Exchanger

Laboratory study on the thermal performance of vertical U‐tube ground heat exchanger during short‐term borehole thermal energy storage ( BTES ) and heat extraction process

Modeling thermal conductivity of clays: A review and evaluation of 28 predictive models

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