Developement of the experimental stand with centrally located specimen for investigation of heating and drying proces in the porous building materials
Łukasz Cieślikiewicz , Michał Wasik , Michał Kubiś , Marcin Bugaj , Piotr Łapka , Karol Pietrak , Tomasz Wiśniewski , Piotr Furmański , Mirosław Seredyński
Abstractinvestigation of heating and drying processes in porous building materials. Additionally, the paper contains preliminary measurement results which test and verify the assumed operation conditions of the stand. In order to control the parameters of air which was used to heat and dry the specimen, the stand was working in a closed loop and was equipped with several elements, i.e., the cooler (humidity condenser), fan with variable rotation speed, humidifier and heater. Moreover, the stand consisted of two square and parallel measurement ducts allowing to obtain two air streams with identical parameters. This enabled carrying out two measurements at one time and verification of the repeatability of the proposed investigation method. The specimen was located in the middle of the duct, which allowed for multidimensional heat and moisture transfer inside the sample. The moisture content at different positions and the overall moisture amount in the specimen were measured applying a system of resistance meters and a force meter, respectively. The specimen temperature variations were measured with several K-type thermocouples and IR thermography. Experimental measurements were carried out for following ranges of the air velocity, temperature and relative humidity: 0.1-10 m/s, 15℃-60℃ and 10-90%, respectively. During the measurements temporal temperature and moisture content variations in several points of the specimen as well as changes in the total amount of moisture in the sample were registered and analysed.
|Publication size in sheets||0.5|
|Book||Stanek Wojciech, Czarnowska Lucyna, Kostowski, Wojciech, Gładysz Paweł (eds.): Proceedings of the 5th International Conference Contemporary Problems of Thermal Engineering. Energy Systems in the Near Future: Energy, Exergy and Economics, 2018, Institute of Thermal Technology, ISBN 978-83-61506-46-1, 1579 p.|
|Keywords in Polish||drying of materials; drying measurements; building materials; experimental stan|
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