In Situ Thermal Conductivity Measurements of Building Materials with a Thermal Probe

2010 ◽  
Vol 38 (3) ◽  
pp. 102636
Author(s):  
M. R. Mitchell ◽  
R. E. Link ◽  
B. Pilkington ◽  
S. Goodhew ◽  
P. deWilde
Keyword(s):  
Thermal Conductivity ◽  
Building Materials ◽  
Conductivity Measurements ◽  
Thermal Probe

scholarly journals Thermal conductivity of frozen soils

1970 ◽  
Vol 7 (3) ◽  
pp. 982-987 ◽  
Author(s):  
E. Penner
Keyword(s):  
Thermal Conductivity ◽  
Heat Flow ◽  
Silty Clay ◽  
Conductivity Measurements ◽  
Thermal Probe ◽  
Frozen Soils ◽  
Transient Heat Flow ◽  
Leda Clay ◽  
Ice Content

Thermal conductivity measurements of two frozen soils, Leda clay and Sudbury silty clay, taken at temperatures between 0 and −22 °C by means of a thermal probe and a transient heat flow technique, compare favorably with estimates of thermal conductivity calculated by the DeVries method. Both measured and estimated values show a similar trend of increasing thermal conductivity as the temperature is lowered and the ice content grows. This increase is associated with the higher thermal conductivity of ice compared with that of water.

scholarly journals In situ thermal conductivity measurements of Titan's lower atmosphere

Icarus ◽  
2008 ◽  
Vol 197 (2) ◽  
pp. 579-584 ◽  
Author(s):  
B. Hathi ◽  
A.J. Ball ◽  
M. Banaszkiewicz ◽  
P.M. Daniell ◽  
J.R.C. Garry ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Lower Atmosphere ◽  
Conductivity Measurements

scholarly journals An estimate of ground heat flux for a seasonal snow cover

MAUSAM ◽  
2021 ◽  
Vol 50 (2) ◽  
pp. 153-158
Author(s):  
A. K. SINGH
Keyword(s):  
Thermal Conductivity ◽  
Heat Flux ◽  
Effective Thermal Conductivity ◽  
Thermal Probe ◽  
Seasonal Snow ◽  
Effective Media ◽  
Ground Heat Flux ◽  
Seasonal Snow Cover ◽  
Temperature Gradient Method

An estimation of ground heat flux for two locations has been done using temperature gradient method. Effective media approach has been adopted for predicting the effective thermal conductivity of ground. For comparison, in situ measurement of effective thermal conductivity of ground has also been done by thermal probe method. The measured values of thermal conductivity are in agreement with the calculated values. The estimated values of ground heat flux have been used to evaluate the melt rate at ground-snow interface.

Analysis of Heat Flow Data—in situ Thermal Conductivity Measurements

1971 ◽  
Vol 8 (1) ◽  
pp. 1-19 ◽  
Author(s):  
A. E. Beck ◽  
F. M. Anglin ◽  
J. H. Sass
Keyword(s):  
Thermal Conductivity ◽  
Field Experiments ◽  
Contact Layer ◽  
Design Parameters ◽  
Probe Design ◽  
Thermal Mass ◽  
Flow Data ◽  
Conductivity Measurements ◽  
The Many

The electrically heated cylindrical probe has often been used to measure the thermal conductivity of materials which allow the contact layer to be small enough to have negligible thermal resistance and negligible thermal mass. The probe method is not widely used in boreholes, mainly because the increased complexity of the theory required by the boundary conditions encountered in typical field situations makes it difficult to design appropriate probes and to interpret the data.This paper deals with the results of a comprehensive series of laboratory and field experiments, using cased and uncased boreholes, to investigate the importance of various design parameters and to compare the relative merits of the many proposed methods of reducing the data.It has been found that there is a surprising degree of latitude in probe design provided an uncertainty of 10% in conductivity values can be tolerated.

scholarly journals Effects of temperature, test duration and heat flux in thermal conductivity measurements under transient conditions in dry and fully saturated states

2020 ◽  
Vol 195 ◽  
pp. 04007
Author(s):  
K. Aljundi ◽  
A. Vieira ◽  
J. Maranha ◽  
J. Lapa ◽  
R. Cardoso
Keyword(s):  
Thermal Conductivity ◽  
Measuring Method ◽  
Heating Time ◽  
Primary Circuit ◽  
Test Duration ◽  
Conductivity Measurements ◽  
Thermal Probe ◽  
Transient Conditions ◽  
Ambient Temperatures ◽  
Shallow Geothermal Energy

In shallow geothermal energy systems (SGES) thermal conduction can be considered the dominant process in the heat transfer between the primary circuit (borehole heat exchanger or thermoactive geostructure) and the surrounding ground. Thus, a proper characterization of soil thermal properties, namely of its thermal conductivity, is mandatory for evaluating this energy exchange. There are difficulties associated to the assessment of soil thermal conductivity by laboratory methods related, among other factors, to the samples’ quality and to the measuring method itself. The purpose of this work is to analyse the effect of changing test control parameters in thermal conductivity measurements in transient conditions by means of a high accuracy thermal probe in both dry and fully saturated states. In order to eliminate potential measurements’ deviations and errors due to sample variability the same reconstituted samples were used several times. In each condition the sand samples were systematically tested under different ambient temperatures (10ºC, 20ºC, and 40ºC) controlled by means of a climatic chamber. The effects of changing the tests heating time and imposed thermal fluxes were also analysed.

Effect of Saturation on Thermal Conductivity of Granular Materials

2020 ◽  
Vol 857 ◽  
pp. 32-38
Author(s):  
Hussein H. Humaish ◽  
Asad H. Aldefae ◽  
Wissam H. Humaish
Keyword(s):  
Thermal Conductivity ◽  
Chemical Composition ◽  
Granular Materials ◽  
Experimental Test ◽  
Building Materials ◽  
Construction Materials ◽  
Comsol Multiphysics ◽  
Transient Technique ◽  
Theoretical Results

Thermal conductivity is one of the most important properties of construction materials due to change the structure and the chemical composition of these materials particularly in hot weathers. Thermal conductivity testing of building materials in situ provides useful database about of temperature, moisture and conditions of storage. In this paper, thermal conductivity of Huston sand has been investigated for dry and saturation status by transient technique. TP02 Hukseflux probe used to calculate thermal conductivity of Huston sand. TP02 Hukseflux probe has been calibrated by Glycerol and compare with results from art-of-literature. The results showed that the value of thermal conductivity during the saturation is more than the dry state. This is identical to reality as the parameter is strongly influenced by presence of water. Comsol Multiphysics® simulation has been used to validate the experimental test. Slightly difference is marked between the experimental and theoretical results

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