Conference Paper

Proceedings of Building Simulation 2019: 16th Conference of IBPSA

     

Induced Infrared Thermography: Flow Visualization of the Indoor Airflow over the Heating Surface

Qing Wu 1,2, Jing Liu 1,2, Chang-an Zhu 3
1 School of Architecture, Harbin Institute of Technology, Harbin 150000, China, People's Republic of
2 Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology, Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin, China
3 China Southwest Architecture Design and Research Institute Co., Ltd, Chengdu 610000, China, People's Republic of

DOI: https://doi.org/10.26868/25222708.2019.210238
Abstract: The near-surface velocity can be measured by a method referred as “thermal image velocimetry”, which acquires flow field according to the displacements of thermal spots in fixed intervals. Depending on the capability of twodimensional velocity visualization and the low system cost, this method is more advantageous over the other kinds of current velocity measurement methods. However, this method is still in the initial stage of development in indoor velocity measurement and feasibility of this method has not been fully verified. We aim to verify the feasibility of this method in the velocity measurement over the heating surface. Differ from the former studies, we conducted the experiments and explored the feasibility of this method in the condition of natural and mixed convection. The flow fields near the heat source were acquired by thermal image velocimetry. Particle image velocimetry was also used to compare the results evaluated by Thermal Image Velocimetry. The results show that the thermal image velocimetry can qualitatively and quantitatively reflect the near-surface velocity in all experimental conditions.
Keywords: Indoor physics, Airflow, Thermal Image, Convection, Mix Convection
Pages: 257 - 262
Paper:

BS2019_210238