Thermal conductivity of disperse insulation materials and their mixtures

3rd International Conference on Innovative Materials, Structures and Technologies

Gea, V.^1 ; Jakovis, A.^1 ; Gendelis, S.^1 ; Usionoks, I.^2 ; Timofejevs, J.^2

Laboratory of Mathematical Modelling of Environmental and Technological Processes, University of Latvia, Zellu str. 25, Riga

LV-1002, Latvia^1

Thermeko LLC, Kandavas str. 14b, Riga

LV-1083, Latvia^2

关键词: Innovative materials;    Insulation materials;    Modeling spatial distribution;    Porous mixture;    Thermal convections;    Thermal insulation materials;    Thermal insulation properties;    Transfer phenomenon;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/251/1/012012/pdf
DOI  :  10.1088/1757-899X/251/1/012012

来源: IOP

【 摘 要 】

Development of new, more efficient thermal insulation materials is a key to reduction of heat losses and contribution to greenhouse gas emissions. Two innovative materials developed at Thermeko LLC are Izoprok and Izopearl. This research is devoted to experimental study of thermal insulation properties of both materials as well as their mixture. Results show that mixture of 40% Izoprok and 60% of Izopearl has lower thermal conductivity than pure materials. In this work, material thermal conductivity dependence temperature is also measured. Novel modelling approach is used to model spatial distribution of disperse insulation material. Computational fluid dynamics approach is also used to estimate role of different heat transfer phenomena in such porous mixture. Modelling results show that thermal convection plays small role in heat transfer despite large fraction of air within material pores.