Paolo Bison is senior researcher at the Institute for Construction Technology of the National Research Council of Italy.
He got the degree in Physical Sciences at the University of Padova (Italy).
From 1988 until 2001 he was a researcher at the CNR-ITEF (National Research Council - Institute for the Refrigeration Technology).
During 1995 he was the head of the research group on 'Thermal Tomography'.
From 1996 to 2000 he was the head of the research group on 'Thermal Non-Destructive Testing'.
He was member of the Scientific Council of CNR-ITEF from 1997 to 2001.
Since 2001 he is a researcher of the CNR-ITC (National Research Council - Construction Technologies Institute).
He was member of the CNR-ITC Institute Council from 2001 to 2005.
He is coauthor of several papers on international reviews and on proceedings of international conferences.
He collaborated within several groups in regional, national and international projects.
He contributed to several research contracts with the industry.
His main field of investigations are: electronic instrumentation and sofware, image processing, thermal parameters measurement, thermal non-destructive testing, heat transfer process, thermography, photothermal methods.
He got the degree in Physical Sciences at the University of Padova (Italy).
From 1988 until 2001 he was a researcher at the CNR-ITEF (National Research Council - Institute for the Refrigeration Technology).
During 1995 he was the head of the research group on 'Thermal Tomography'.
From 1996 to 2000 he was the head of the research group on 'Thermal Non-Destructive Testing'.
He was member of the Scientific Council of CNR-ITEF from 1997 to 2001.
Since 2001 he is a researcher of the CNR-ITC (National Research Council - Construction Technologies Institute).
He was member of the CNR-ITC Institute Council from 2001 to 2005.
He is coauthor of several papers on international reviews and on proceedings of international conferences.
He collaborated within several groups in regional, national and international projects.
He contributed to several research contracts with the industry.
His main field of investigations are: electronic instrumentation and sofware, image processing, thermal parameters measurement, thermal non-destructive testing, heat transfer process, thermography, photothermal methods.
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A preliminary numerical study is conducted with the creation of a finite element model. Firstly, the model is checked with the standard case of a full disk. Then the simulation investigates the case of an aluminum oxide ring, that is taken as the reference case to determine the reliability of the proposed technique.
After the simulation, an experimental measurement is performed on the aluminum oxide ring reference case. Several samples are tested and useful information on the practical feasibility of the experimental setup are collected. The obtained thermal diffusivity values fall into the expected range for the material, confirming the validity of the suggested method.
This work investigates the possibilities and limitations of spot thermographic surveys coupled with contact probes, that are able to acquire continuously the thermal signal for days, to investigate the thermal bridges of a building. The goal is the estimation of the reliability and accuracy of the measurement under realistic environmental conditions. Firstly, numerical simulations are performed to determine the reference value of an experimental case. Then a long term thermographic survey is performed and integrated with the contact probe measurement, assessing the feasibility of the method.
Wood is a material characterized by a high anisotropy due to its characteristic growing. Mechanical properties, and thermal as well, are very different if considered along the direction of grain or perpendicular to it.
In manufacturing the frame for windows, the fiber or grain direction must be selected in such a way to maximize the thermal resistance along the inside to outside direction, that means the inside/outside direction of frame (i.e. inside/outside direction of window) must be perpendicular to the grain direction. Indeed the grain direction is the one with the maximum thermal conductivity while the perpendicular one (crossing the fiber direction) owns a lower conductivity value.
The anisotropic characteristics of wood made it a challenging material for the measurement of thermal conductivity. Three types of wood have been measured: oak, larch and spruce. Two instruments have been utilized: a) the hot disk apparatus; b) the IR thermography equipment in transmission (a variant of the Parker’s method) and reflection scheme complemented by density and specific heat measurements. In particular, IR thermography gives the possibility to evaluate by images the preferential direction of heat propagation by looking at the deformation of a localized heat source released on the surface (i.e. a circular shape can become an ellipse as heat diffuses on the surface). Results coming from different kind of measurements are compared and critically considered.
Sportswear textiles emissivity measurement: comparison of IR thermography and emissometry techniques
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