Thermal Conductivity of Moist Autoclaved Aerated Concrete: Experimental Comparison Between Heat Flow Method (HFM) and Transient Plane Source Technique (TPS)

2016 ◽  
Vol 113 (2) ◽  
pp. 345-355 ◽  
Author(s):  
Manuela Campanale ◽  
Lorenzo Moro
Keyword(s):  
Thermal Conductivity ◽  
Heat Flow ◽  
Experimental Comparison ◽  
Plane Source ◽  
Flow Method ◽  
Autoclaved Aerated Concrete ◽  
Transient Plane Source ◽  
Aerated Concrete ◽  
Transient Plane Source Technique

scholarly journals Determination of the anisotropic thermal conductivity of an aerogel-based plaster using transient plane source method

2021 ◽  
Vol 2069 (1) ◽  
pp. 012030
Author(s):  
A N Karim ◽  
B Adl-Zarrabi ◽  
P Johansson ◽  
A Sasic Kalagasidis
Keyword(s):  
Thermal Conductivity ◽  
Heat Flow ◽  
Thermal Performance ◽  
Plane Source ◽  
Weak Anisotropy ◽  
Source Method ◽  
Transient Plane Source ◽  
Anisotropic Thermal Conductivity ◽  
Transient Plane Source Method ◽  
Thermal Conductivities

Abstract Aerogel-based plasters are composite materials with declared thermal conductivities in the range of traditional insulating materials, i.e. 30-50 mW/(m·K). Based on the results from reported field measurements, aerogel-based plasters can significantly reduce the thermal transmittance of uninsulated walls. However, the in-situ measured thermal conductivities have sometimes been higher than the declared values measured in laboratory and in the main direction of the heat flow. Meanwhile, the anisotropic thermal performance of aerogel-based plasters, i.e., deviating thermal performance in the different directions of heat flow, has not been explored yet. The objective of this study is thus to evaluate the anisotropic thermal conductivity of an aerogel-based plaster. This is done in a set of laboratory measurements using the transient plane source method. Six identical and cubic samples with the dimensions of 10×10×10 cm3 were paired two and two, creating three identical sample sets. In total, 360 measurements of thermal conductivity and thermal diffusivity, and 130 measurements for specific heat capacity were conducted. The results indicate a weak anisotropy of less than ±6.5 % between the three directions (x, y, z). Considering the accuracy of the selected measurement technique, better than ±5 %, supplementary measurements using another technique are recommended.

An Experimental Study on the Inhomogeneities of Aluminum Foams Measuring the Thermal Conductivity by Using the Transient Plane Source Method

2005 ◽  
Vol 480-481 ◽  
pp. 133-138 ◽  
Author(s):  
J.A. Reglero ◽  
Miguel A. Rodríguez-Pérez ◽  
D. Lehmhus ◽  
M. Windmann ◽  
Jose A. de Saja ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Plane Source ◽  
Aluminum Foams ◽  
Foaming Process ◽  
Transient Plane Source ◽  
Closed Cell ◽  
Transient Plane Source Method ◽  
Transient Plane Source Technique ◽  
Non Destructive ◽  
Theoretical Results

A collection of AlSi7 closed cell foams were fabricated following the powder metallurgical route [1,2], reaching densities between 540 Kg/m3 and 1350 Kg/m3. Thermal conductivity of the samples was determined using the Transient Plane Source technique (TPS) [3,4], and influence of density was estimated. Several models were tested, and the correlation between experimental data and theoretical results was evaluated. Finally, measurements in different directions were performed, revealing the use of the TPS technique as a non-destructive tool to investigate the existence of in-homogeneities derived from the foaming process.

THE TRANSIENT PLANE SOURCE TECHNIQUE TO MEASURE THERMAL CONDUCTIVITY OF CLAYS OF BIKANER REGION

2013 ◽  
Vol 22 ◽  
pp. 42-50
Author(s):  
M. S. SHEKHAWAT ◽  
S. K. TAK ◽  
R. MANGAL
Keyword(s):  
Thermal Conductivity ◽  
Thermal Diffusivity ◽  
Special Reference ◽  
Room Temperature ◽  
Normal Pressure ◽  
Plane Source ◽  
Transient Plane Source ◽  
Maximum Value ◽  
Transient Plane Source Technique

Thermal conductivity and thermal diffusivity of blended clays have been studied with special reference to Ukrainian clay. The blends were made of three different clays available locally in western part of Rajasthan. Thermal conductivity and thermal diffusivity were determined using the transient plane source (TPS) technique at room temperature and normal pressure. It was found that thermal conductivity and thermal diffusivity of the blends reported maximum at temperature 1200° C and near in the values of Ukrainian clay. The thermal conductivity of blend B2 reported maximum value (1.29 W/m-k) in the present study.

Structural and Thermal Characterization of Polymorphic Er2Si2O7

2012 ◽  
Vol 510-511 ◽  
pp. 255-260
Author(s):  
Ashari Maqsood
Keyword(s):  
Thermal Conductivity ◽  
Thermal Diffusivity ◽  
Transport Properties ◽  
Temperature Region ◽  
Thermal Characterization ◽  
Plane Source ◽  
Transient Plane Source ◽  
Transient Plane Source Technique ◽  
Made In

The first measurement of thermal transport properties on the polycrystalline D-Er2Si2O7have been made in the temperature range 77-300K. Both the thermal conductivity and the thermal diffusivity follow modified Euckens law in this temperature region. The Transient Plane Source technique (TPS) has been used to measure thermal conductivity and thermal diffusivity simultaneously.

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