Measuring Thermal Conductivity Under Pressure

HPC for Thermal Conductivity

Discrepancies between experimental and excepted performance of a material often stems from a lack of control around the testing parameters. The use of non-representative conditions to model or extrapolate a material’s performance at the desired conditions can lead to failure of a designed process, with monetary and safety repercussions. Especially critical when analyzing thermal properties (thermal conductivity (k) thermal effusivity (e) and heat capacity (Cp), variables such as temperature, pressure and sample matrix can all heavily influence the resulting measurements. When attempting to replicating real world conditions in the lab, controlling such variables are crucial and selecting the appropriate method/setup for the task is of great importance for accurate and valid results.

In generating accurate, representative test data for a particular application – it is critical to replicate the expected environmental conditions. Oil and gas companies depend on the quality of this data for site monitoring and exploration for deposits. Because many methods of extraction involve thermal input, it is important to understand how the materials behave under a thermal load.

Due to the depth of many of these oil reserves, testing materials of interest under elevated pressures can be greatly beneficial to understanding the overall system behavior. Combining the effect of pressure with temperature can thus be used to help better model extraction processes and help guide groups from both an efficiency and safety perspective. The effect of sample matrix is also highly influential on the resulting thermal properties. Whether it be the surrounding geological matrix in shale deposits or the intermixed materials of oil sands, being able to test both the individual components as well as the entire system is critical to properly understanding the overall picture.

To address these factors when testing thermal properties, C-Therm developed a method for measuring thermal properties under representative application conditions at elevated temperatures and pressures. The Modified Transient Plane Source (MTPS) offers a high sensitivity measurement of both thermal conductivity and effusivity for improved process optimization. The sensor can be operated up to 500 °C and pressures up to 138 Bar with C-Therm’s optional high pressure cell.

During this webinar we will address some considerations for optimal extraction process design, discuss some of the common extraction methods and breakdown some common material types involved in many of these applications. We will also highlight some specific case studies involving the testing of both solid and liquid samples under high temperature and pressure conditions and demonstrate the effect on the resulting thermal conductivity and effusivity measurements. The effect of pressure on heat capacity will also be highlighted as a parameter of interest for many industry applications.

This webinar is recommended for engineers in the Oil & Gas sector involved in modelling and optimizing extraction processes dependent on thermal loads as a means of extraction. The webinar will also appeal to any researchers, scientist and engineers concerned with overall process safety where the heat dissipation characteristics of the material are important.

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