FYI: Report on Elmer in heat conductivity determination
Posted: 02 Jan 2012, 12:26
Hello @all,
I was not quite sure if this sub-forum is the right place to publish respective information. If not, forum maintainers please re-link this contribution!
Background: In the last 3 years (with a 1 year's pause) we performed a study on the possibility of determining heat conductance properties of building walls of unknown structure, without the necessity to bore a hole right through and to perform a visual inspection of their constructions.
Topic of the project:
Development of a Fast, Non-Invasive Determination of Thermal Conductivities of Opaque Building Walls
The innovative idea was
a) to perform a thermographic detection of transmitted heat at the outside surface of a wall after introducing the heat at the inner surface in a controlled manner. The experiment is accompanied by Elmer simulations testing different constellations of thermodynamic parameters (heat conductivity, heat capacity, wall dimension, layer structure) for the best possible approximation of simulation to experimental results.
b) to monitor the temperature development *inside* a wall in a bore hole, with the inner and outer surface temperatures of the wall being the determinants of the imposed temperature distribution. Again, Elmer is used to simulate the time resolved temperature distribution inside the wall, but this time as a time series at the position of the wall-interior temperature measurement spot. Elmer (in collaboration with the Salomé mesh generator) is integrated as a batch processing engine into an evolutionary optimization cycle for thermodynamic parameter determination.
The final report on this project is available as (sorry: German-only!) full report (approx. 6 MB) and a short summary in english.
If anyone in here is interested in a future cooperation on similar or related topics we would love to receive a short notice!
Regards, and thanks to the Elmer Team to make such developments possibe!
Peter
I was not quite sure if this sub-forum is the right place to publish respective information. If not, forum maintainers please re-link this contribution!
Background: In the last 3 years (with a 1 year's pause) we performed a study on the possibility of determining heat conductance properties of building walls of unknown structure, without the necessity to bore a hole right through and to perform a visual inspection of their constructions.
Topic of the project:
Development of a Fast, Non-Invasive Determination of Thermal Conductivities of Opaque Building Walls
The innovative idea was
a) to perform a thermographic detection of transmitted heat at the outside surface of a wall after introducing the heat at the inner surface in a controlled manner. The experiment is accompanied by Elmer simulations testing different constellations of thermodynamic parameters (heat conductivity, heat capacity, wall dimension, layer structure) for the best possible approximation of simulation to experimental results.
b) to monitor the temperature development *inside* a wall in a bore hole, with the inner and outer surface temperatures of the wall being the determinants of the imposed temperature distribution. Again, Elmer is used to simulate the time resolved temperature distribution inside the wall, but this time as a time series at the position of the wall-interior temperature measurement spot. Elmer (in collaboration with the Salomé mesh generator) is integrated as a batch processing engine into an evolutionary optimization cycle for thermodynamic parameter determination.
The final report on this project is available as (sorry: German-only!) full report (approx. 6 MB) and a short summary in english.
If anyone in here is interested in a future cooperation on similar or related topics we would love to receive a short notice!
Regards, and thanks to the Elmer Team to make such developments possibe!
Peter