Open AccessHEAT EXCHANGE IN FOAM CONCRETE REINFORCED BY POLYETHYLENE TEREPHTHALATE FIBER (PET FIBER)
Author(s) -
Kseniya Domnina,
Kseniya Domnina,
Elena Pivarčiová,
Валентин Репко,
Валентин Репко,
Mariia Sotnikova,
Mariia Sotnikova
Publication year - 2019
Publication title -
vestnik bgtu im. v.g. šuhova
Language(s) - English
Resource type - Journals
ISSN - 2071-7318
DOI - 10.34031/article_5d35d0b6c4cf71.39272431
Subject(s) - materials science , polyethylene terephthalate , composite material , heat transfer , heat transfer coefficient , holographic interferometry , fiber , interferometry , optics , thermodynamics , physics
The article analyzes temperature fields over foam concrete samples reinforced by PET fibers. The samples are developed at the Votkinsk branch of Kalashnikov Izhevsk State Technical University. The effectiveness of reinforced PET fibers has already been proven, but so far, the effect of PET reinforcement on the thermophysical properties of foam concrete has not been well studied. In the laboratories of the Technical University in Zvolen, Slovakia (TUZVO), the heat transfer is analyzed using natural convection by heating reinforced foam concrete samples. The method of holographic interferometry is used, which allows to visualize temperature fields in real time. Temperature fields arising above the samples are displayed and recorded by a Mach-Zehnder interferometer using the «living boundary» method throughout the entire length of the interference fringes. A method for calculating the parameters of heat transfer by analogy with the heating of a flat plate has been proposed. Qualitative and quantitative analyzes of holographic interferograms of the temperature fields are carried out. The local heat transfer parameters are calculated: the heat transfer coefficient α and the heat conductivity coefficient λ. It has been established that the samples of foam concrete reinforced by PET fibers made in Russia have a higher heat resistance and better insulation than foreign analogues.