<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The slab model has been used for parameter estimation from the measurement performed by the Pulse Transient Technique. The estimation of thermophysical parameters was done on carbonate rock sample. In addition to basic thermal parameter for example thermal diffusivity, thermal conductivity and specific heat capacity, the slab model takes into account the heat capacity of the heat source, as well as the heat transfer coefficient between the heat source and the sample. The thermophysical parameters were estimated for the case when thermal conductive paste as a heat contact agent was not used for the measurements. The paste contains silicone oil that penetrates into the porous stone material and thus causes irreversible changes of properties during the measurement so we decided not to use it. The experiment was done with dry contacts at the interfaces that causes the disturbances in the measurement that have been introduced and resolved using the slab model. Uncertainty analysis of the estimation of the parameters by the slab model was done for real measurements conducted on the carbonate rock. In this paper we analyzed the quality of the temperature response fit in dependency on the originally free fitted parameters of the heat transfer coefficient and the heat capacity of the heat source that was replaced by constant values in two steps. The heat capacity of the heat source was calculated from the material properties, e.g., the nickel and Kapton. The fit results obtained by the slab model were compared with the data obtained by the ideal and cuboid model. The analysis of the sensitivity coefficients and calculated uncertainties of estimated parameters with the slab model help to improve the accuracy of parameter estimation.</p></abstract>

The slab model has been used for parameter estimation from the measurement performed by the Pulse Transient Technique. The estimation of thermophysical parameters was done on carbonate rock sample. In addition to basic thermal parameter for example thermal diffusivity, thermal conductivity and specific heat capacity, the slab model takes into account the heat capacity of the heat source, as well as the heat transfer coefficient between the heat source and the sample. The thermophysical parameters were estimated for the case when thermal conductive paste as a heat contact agent was not used for the measurements. The paste contains silicone oil that penetrates into the porous stone material and thus causes irreversible changes of properties during the measurement so we decided not to use it. The experiment was done with dry contacts at the interfaces that causes the disturbances in the measurement that have been introduced and resolved using the slab model. Uncertainty analysis of the estimation of the parameters by the slab model was done for real measurements conducted on the carbonate rock. In this paper we analyzed the quality of the temperature response fit in dependency on the originally free fitted parameters of the heat transfer coefficient and the heat capacity of the heat source that was replaced by constant values in two steps. The heat capacity of the heat source was calculated from the material properties, e.g., the nickel and Kapton. The fit results obtained by the slab model were compared with the data obtained by the ideal and cuboid model. The analysis of the sensitivity coefficients and calculated uncertainties of estimated parameters with the slab model help to improve the accuracy of parameter estimation.

Thermophysical Parameters of Carbonate Rock estimated by Slab Model Developed for Pulse Transient Technique

Faculty of Electrical engineering and Information Technology

Measurement Science Review

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The slab model has been used for parameter estimation from the measurement performed by the Pulse Transient Technique. The estimation of thermophysical...

Thermophysical Parameters of Carbonate Rock estimated by Slab Model Developed for Pulse Transient Technique

Published Online: Oct 29, 2020

Page range: 218 - 223

Received: Aug 10, 2019

Accepted: Sep 14, 2020

DOI: https://doi.org/10.2478/msr-2020-0027

Keywords
Pulse Transient Technique, sensitivity coefficient, uncertainty analysis, thermal property, slab and cuboid model

© 2020 Rupali Tiwari et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Thermophysical Parameters of Carbonate Rock estimated by Slab Model Developed for Pulse Transient Technique

Published Online: Oct 29, 2020

Page range: 218 - 223

Received: Aug 10, 2019

Accepted: Sep 14, 2020

DOI: https://doi.org/10.2478/msr-2020-0027

KeywordsPulse Transient Technique, sensitivity coefficient, uncertainty analysis, thermal property, slab and cuboid model

© 2020 Rupali Tiwari et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Pulse Transient Technique, sensitivity coefficient, uncertainty analysis, thermal property, slab and cuboid model