Measurement and analysis of thermal properties of rocks for the compilation of geothermal maps of Cyprus

Stylianou, Iosifina Iosif; Tassou, S.A.; Christodoulides, Paul; Panayides, I.; Florides, Georgios A.

doi:10.1016/j.renene.2015.10.058

Cited by 37 publications

(20 citation statements)

References 16 publications

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“…The island geologically is divided into four distinct geomorphological regions (Figure 1), reflecting changes in lithology: (a) the Keryneia or Pentadactylos Range, (b) the Troodos Ophiolite Complex (Range), (c) the Mamonia Complex, and (d) the Mesaoria Plain (or Circum Troodos Sedimentary Succession). The topography of the island is controlled by the tectonic structure of these four geological terranes [75,76].…”

Section: Geological Settingmentioning

confidence: 99%

Correlations between the Properties of Crushed Fine Aggregates

Fournari

Ioannou

2019

Minerals

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Aggregates are essential in the production of composite building materials and their properties and characteristics influence the performance of these materials in use. Nevertheless, despite the existence of several standardized and other methods for testing aggregates, the inherent inhomogeneity of these geomaterials does not permit the establishment of rigid specifications for their quality. Hence, research on aggregate testing and quality control is always timely. This paper presents the results of standardized (soundness, Micro-Deval, sand equivalent, methylene blue, water absorption, and relative density) and non-standardized (PXRD) laboratory tests performed on crushed fine aggregates of different mineralogical composition quarried in Cyprus. From these results, it is evident that the mineralogical composition of aggregates affects their physicomechanical properties. A good correlation was observed between the magnesium sulphate soundness coefficient and the Micro-Deval coefficient. This may lead to the introduction of an alternative test method for the quality testing of fine aggregates at European level. A reasonable correlation was also noted between the methylene blue and sand equivalent test results, despite the fact that the literature does not seem to support such a relationship. No further correlations were observed among the rest of the properties investigated.

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Section: Geological Settingmentioning

confidence: 99%

Correlations between the Properties of Crushed Fine Aggregates

Fournari

Ioannou

2019

Minerals

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“…A correction method developed by Reference [44] uses the thermal parameters of the probe and sample to automatically determine the effective amount of heat entering into the sample material and evaluate the thermal properties of the sample. Examples of applications in soils/rocks can be found in References [62][63][64][65].…”

Section: Transient Plane Source (Tps) Methodsmentioning

confidence: 99%

Characterisation of Ground Thermal and Thermo-Mechanical Behaviour for Shallow Geothermal Energy Applications

et al. 2017

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Increasing use of the ground as a thermal reservoir is expected in the near future. Shallow geothermal energy (SGE) systems have proved to be sustainable alternative solutions for buildings and infrastructure conditioning in many areas across the globe in the past decades. Recently novel solutions, including energy geostructures, where SGE systems are coupled with foundation heat exchangers, have also been developed. The performance of these systems is dependent on a series of factors, among which the thermal properties of the soil play a major role. The purpose of this paper is to present, in an integrated manner, the main methods and procedures to assess ground thermal properties for SGE systems and to carry out a critical review of the methods. In particular, laboratory testing through either steady-state or transient methods are discussed and a new synthesis comparing results for different techniques is presented. In situ testing including all variations of the thermal response test is presented in detail, including a first comparison between new and traditional approaches. The issue of different scales between laboratory and in situ measurements is then analysed in detail. Finally, the thermo-hydro-mechanical behaviour of soil is introduced and discussed. These coupled processes are important for confirming the structural integrity of energy geostructures, but routine methods for parameter determination are still lacking.

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“…The following methods were used for thermophysical characterization of the materials [11][12][13][14][15][16][17][18][19]. The asymmetric hot plane device [11] was used for the sample characterization.…”

Section: Determination Of Thermophysical Propertiesmentioning

confidence: 99%

Thermophysical Characterization of Granite, Basalt and Marble Ornamental Stones in Benin

Ambelohoun¹,

Toukourou²,

Fannou³

et al. 2019

CJAST

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This work aims to evaluate the thermophysical characteristics of local ornamental stones in order to facilitate their choice as efficient flooring materials. Methodology: Three varieties of the most known and requested ornamental stones on the market which include granite, marble and basalt extracted from the Beninese ground and subjected to asymmetric hot plane method to determine their thermal effusivity, thermal conductivity, thermal diffusivity and volumetric heat capacity. The parallelepiped-shaped samples of 10 cm × 10 cm × 3 cm were performed for measurements. The followings are the results of the different rocks studied: granite (3.220.01 W.m⎻1.K⎻1, 2470.510.006 J.m⎻1.K⎻1.s⎻1/2, 1.700.01μm².s⎻1, 1892.886.86 KJ.K⎻1.m⎻3); marble (4.940.02 W.m⎻1.K⎻1, 3416.340.009 J.m⎻1.K⎻1.s⎻1/2, 2.090.01 μm².s⎻1, 2362.737.90 KJ.K⎻1.m⎻3) and basalt (3.850.008 W.m⎻1.K⎻1, 2744.220.004 J.m⎻1.K⎻1.s⎻1/2, 1.9670.008 μm².s⎻1, 1956.494.07 KJ.K⎻1.m⎻3). Therefore granite is more insulating and marble has better ability to store heat.

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Measurement and analysis of thermal properties of rocks for the compilation of geothermal maps of Cyprus

Cited by 37 publications

References 16 publications

Correlations between the Properties of Crushed Fine Aggregates

Correlations between the Properties of Crushed Fine Aggregates

Characterisation of Ground Thermal and Thermo-Mechanical Behaviour for Shallow Geothermal Energy Applications

Thermophysical Characterization of Granite, Basalt and Marble Ornamental Stones in Benin

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