PSI - Issue 36

Anatolii Pavlenko et al. / Procedia Structural Integrity 36 (2022) 3–9 Anatolii Pavlenko, Andrii Cheilytko, Serhii Ilin, et al. / Structural Integrity Procedia 00 (2021) 000 – 000

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energy due to the thermal conductivity of the material, the thermal conductivity of air in the pores and convective transfer in the channel pores. All this processes will depend on the size of the pores and their number. Existing case specific theories and semi-empirical dependencies do not cover the whole area and the variety of porous materials and structures. To date, exhaustive studies have been conducted of methods for improving the energy efficiency of structures and structural integrity. The aim of the research was to simulate indoor air temperature depending on heating rate, solar heat gains, infiltration rate and outdoor air temperature. In order to get the desired result dynamic model of the room was created in EnergyPlus program, which is a widely used building energy simulation program. Based on the developed model and modified IWEC weather data the series of simulations were performed for inside air temperature calculation depending on internal and external factors changes. The analysis of individual and aggregate factors influence on inside air temperature change was performed. The present invention relates to a process for manufacturing a construction material by mixing a cementitious material, rubber bits and water was investigated, Lee (2005). Two-dimensional nano-structures were successfully constructed on the pore surfaces of porous membranes by depositing nanoparticles for enhanced surface wettability in this study, in order to obtain improved oil – water separation performance of membranes, Meng et al. (2013). The research deals with the generalized method of calculating the natural component of the air exchange multiplicity and the air exchange of the premises of an eight-storey building. In addition, studies of the basic parameters of porous insulators were conducted. The improvement of the thermal insulating material thermophysical characteristics of the thermal protection elements by studying the porous structure is a promising direction of research, Pavlenko et al. (2019). The research deals with the effects of the porosity and coupling of the porous structure on the thermophysical characteristics of thermal insulating materials. The research uses standard systematized techniques and instruments of scientific research applied in thermophysics. The research methodology of highly-porous material thermophysical properties is based on performance of empirical laboratory investigations of the samples obtained. The porous were construct as compliant yet determining important structural parameters such as stresses and strains that could be sensed by the cells. It was established that among the fundamental consistent patterns that determine the formation aftereffects during formations mining, are the methodological provisions and criteria for failure parameters prediction and grinding effects, namely: the average and local energy density of geoenvironment destruction, efficiency of grinding, the average particle and pore size, the specific surface area, the specific energy consumption per unit of the resulting surface, Biletskyi et al. (2018). Creation of the heat-insulating structure, which has simple manufacturing, optimal physical properties were researched, Sereda et al. (2010). In addition, works on construction and metallurgy were devoted to the processes of creating pores are found in the following literature: Cho et al. (2019), Rogers et al. (2019), Thevathasan et al. (2019), Haque et al. (2019), Bredante et al. (2019), Yang et al. (2019), Scherer (1999). The substantiation of pore formation, kinetics, and mechanism of development of structured porous systems is presented in the paper, Rogers et al. (2019). Classification proposed of the genesis of pores in thermal insulation materials and thermal protection structures power equipment that allows to separate porous constructions by technological features of their creation and heat-mass transfer processes in these structures. The hypothesis of change of complex parameters of porous structure during forming of insulating material from wet raw mix is formulated. Supplementary hypothesis: there are three periods of change in the complex parameters of the porous structure of the insulating material during the formation of it structures due to the supply of thermal energy to the raw material mixture. The formation of pores due to chemical reactions, the degree of gas saturation, and vapor formation are attributed to the diffusion genesis of the pores. The genesis of the pore destruction is attributed to the formation of pores due to thermal destruction, deformation and radiation. 2. Purpose and objectives The purpose of this study is to create a model for the transfer of thermal energy through porous and fibrous porous structures. To achieve the objectives, it is necessary to determine a number of tasks: