Study of the model of the phase transition envelope taking into account the process of thermal storage under natural draft and by air injection
Zhangabay N. Kudabayev R. Mizamov N. Imanaliyev K. Kolesnikov A. Moldagaliyev A. Umbitaliyev A. Kopzhassarov B. Fediuk R. Merekeyeva A.
July 2023Elsevier Ltd
Case Studies in Construction Materials
2023#18
The study proposed mathematical modeling of the enclosing structure of the building, which includes an energy-active panel accumulating solar radiation due to the phase transition of the heat-accumulating material. The mathematical model is based on a two-dimensional non-stationary nonlinear heat conduction equation describing the process of heat transfer in the bearing layer of the enclosing structure and the energy-active panel, taking into account the process of heat accumulation under natural and forced traction by air injection. In comparison of the calculation results, it was found. that the efficiency of the use of forced convection relative to natural was 33–44% in the question of the selection of useful heat, depending on the time (second or first day), and the value of heat accumulation showed almost the same results. Taking into account the research carried out by the authors, it is shown by calculation that enclosing structures in which a heat-accumulating material with a phase transition is used to accumulate solar energy are more energy efficient than simple heat accumulation in the carrier layer. The introduction of highly conductive inclusions into the energy-active panel and the use of forced convection instead of natural traction during heat extraction also significantly increase the energy efficiency of the structure, which can subsequently be used as an option for external fencing under appropriate climatic conditions.
Air injection , Forced draft , Heat-accumulating material , Heat-reflecting screen , Model , Phase transition
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Department of “Construction and Construction Materials”, M. Auezov South Kazakhstan University, Av. Tauke Khan, 5, Shymkent, 160012, Kazakhstan
Department of “Life Safety and Environmental Protection”, M. Auezov South Kazakhstan University, Av. Tauke Khan, 5, Shymkent, 160012, Kazakhstan
Department of “Mechanics and Mechanical Engineering”, M. Auezov South Kazakhstan University, Av. Tauke Khan, 5, Shymkent, 160012, Kazakhstan
Department of Economics, Shymkent University, Silk Road str., 150, Karatausky District, Shymkent, 160031, Kazakhstan
Polytechnic Institute, Far Eastern Federal University, Vladivostok, 690922, Russian Federation
Peter the Great St. Petersburg Polytechnic University, Saint Petersburg, 195251, Russian Federation
Department of Academic Science, M. Auezov South Kazakhstan University, Av. Tauke Khan, 5, Shymkent, 160012, Kazakhstan
Department of “Construction and Construction Materials”
Department of “Life Safety and Environmental Protection”
Department of “Mechanics and Mechanical Engineering”
Department of Economics
Polytechnic Institute
Peter the Great St. Petersburg Polytechnic University
Department of Academic Science
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