In this study, the researchers investigated the thermal conductivity, thermal diffusivity and specific heat of four types of wood: beech, birch, spruce and Douglas fir. The main factor influencing the thermal properties of the wood was the moisture content of each sample, which was manipulated by the researchers. Samples of each type of wood were taken and placed in a hot and wet air flow device for varying times in ...
The present study used the transient plane source (TPS) technique to measure the thermal conductivity of a series of AlSi7 metal foams prepared by the powder metallurgical route. The main difference between the different foam samples was their density, which led to a change in thermal conductivity. In addition to measuring thermal conductivity, the TPS sensor was used to detect in-homogeneities by placing it on each face of a cube ...
A variety of metallic hollow sphere structures were prepared with different metals, values for diameter and shell thickness and their densities were predicted using analytical/empirical models. From these densities, admitted scaling laws are used to predict thermal conductivity. The predicted values for thermal conductivity are then compared to experimental values for the same structures, as determined by the transient plane source (TPS) technique....
In this study, three series of high-volume fly ash (HVFA) mortars and concretes were studied using the transient plane source (TPS) technique. Each series of sample contained varying weight % of fly ash from 0 to 75%. The three sample sets were prepared by different laboratories and the results were compared. Thermal conductivity and specific heat capacity were measured, and the authors detailed their method of doing this. It was determined that the ...
The author compares some currently existing method of measuring thermal conductivity and elaborates on a couple of newer methods. The pre-existing methods include hot wire and laser flash diffusivity, and the newly introduced methods are the modified how wire (MHW) and transient plane source (TPS) techniques. The necessary conditions (samples sizes, sample composition, test times, etc) are explained for the two newly introduced techniques. Experimental runs are carried out using ...
