AbstractAbout AuthorsReferences
To ensure energy savings in buildings, it is advisable to use effective thermal insulation materials, materials with a low radiation coefficient in particular. Such building materials include multilayer materials made of foamed polyethylene with reflective heat insulation made of aluminum foil located between the layers of foam polyethylene. Currently, the assessment of thermal insulation characteristics of such materials – thermal resistance and thermal conductivity is carried out only experimentally. The article presents a developed calculation method for determining the thermal resistance of multilayer polyethylene foam with reflective insulation made of aluminum foil between the layers, which takes into account both the transfer of heat in the material due to the thermal conductivity process and due to radiation. Studies of samples of multilayer material of different thickness by experimental and computational methods are presented. Comparison of the thermal resistance values obtained by various methods showed good convergence, which makes it possible to use the developed calculation method for calculating the thermal resistance of samples made of low-density foam polyethylene with reflective insulation made of aluminum foil. Research conducted has also confirmed that foamed polyethylene with reflective insulation made of aluminum foil between layers of polyethylene foam is an effective thermal insulation material.
N.P. UMNYAKOVA, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)
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6. Vytchikov Yu.E., Saporev M.E. Study of the heat-shielding characteristics of enclosed air spaces in building envelopes using screen thermal insulation. Vestnik STASU. Gradostroitel’stvo i arkhitektura. 2014. No. 1 (14), pp. 98–102. (In Russian).
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9. Manankov V.M. Reflective thermal insulation in energy-efficient construction. Vestnik MGSU. 2011. No. 3, pp. 319–326. (In Russian).
10. Mansurov R.Sh., Fedorova N.N., Efimov D.I., Kosova E.Yu. Mathematical modeling of the thermotechnical characteristics of exterior fencing with air gaps. Inzhenerno-fizicheskii zhurnal. 2018. Vol. 91. No. 5, pp. 1287–1293. (In Russian)
11. Umnyakova N.P. Heat protection of cloused air spaceswith reflective insulation. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2014. No. 1–2, pp. 16–20. (In Russian).
12. Fokin V.M., Lepilov V.I Thermal diffusivity studies when heating systems with multilayer shielding. Internet-vestnik VolgGASU. Politematicheskaya seriya. 2007. Vol. 2 (3). (In Russian).
13. Umnyakova N.P., Tsygankov V.M., Kuzmin V.А. Experimental heat engineering studies for rational design of wall structures with reflecting heat insulation. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2017. No. 1–2, pp. 38–42. (In Russian). DOI: https://doi.org/10.31659/0044-4472-2018-1-2-38-42
2. Ujma F., Umnyakova N. Thermal efficiency of the building envelope with the air layer and reflective coatings. E3S Web of Conferences. 2019. Vol. 100. 00082. DOI: https//doi.org/10.1051/e3sconf/201910000082
3. Umnyakova N. Influence of surface emissivity on the heat loss through the wall behind the heater. Procedia Engineering. 2015. Vol. 111, pp. 797–802. DOI: https://doi.org/10.1016/j.proeng.2015.07.148
4. Fokin K.F. Stroitel’naya teplotekhnika ograzhdayushchikh chastei zdanii. Pod red. Yu.A. Tabunshchikova, V.G. Gagarina [Construction heat engineering of enclosing parts of buildings / Edited by Yu.A. Tabun-shchikova, V.G. Gagarin]. Moscow. AVOK-PRESS. 2006. 256 p.
5. Umnyakova N.P. Heat transfer through enclosing structures with due regard for coefficients of radiation of inner surfaces of premises. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2014. No. 6, pp. 14–17. (In Russian).
6. Vytchikov Yu.E., Saporev M.E. Study of the heat-shielding characteristics of enclosed air spaces in building envelopes using screen thermal insulation. Vestnik STASU. Gradostroitel’stvo i arkhitektura. 2014. No. 1 (14), pp. 98–102. (In Russian).
7. Zhun G.G. Research on screen-vacuum thermal insulation with new materials. Energosberezhenie. Energetika. Energoaudit. 2012. No. 8 (102), pp. 59–63. (In Russian).
8. Kuzmin V.A. Research in possibilities to use reflective heat insulation in multi-layer sandwich-panels with due regard for multiple reflection. Stroitel’nye Materialy [Construction Materials]. 2017. No. 6, pp. 35–40. DOI: https://doi.org/10.31659/0585-430X-2017-749-6-35-40. (In Russian).
9. Manankov V.M. Reflective thermal insulation in energy-efficient construction. Vestnik MGSU. 2011. No. 3, pp. 319–326. (In Russian).
10. Mansurov R.Sh., Fedorova N.N., Efimov D.I., Kosova E.Yu. Mathematical modeling of the thermotechnical characteristics of exterior fencing with air gaps. Inzhenerno-fizicheskii zhurnal. 2018. Vol. 91. No. 5, pp. 1287–1293. (In Russian)
11. Umnyakova N.P. Heat protection of cloused air spaceswith reflective insulation. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2014. No. 1–2, pp. 16–20. (In Russian).
12. Fokin V.M., Lepilov V.I Thermal diffusivity studies when heating systems with multilayer shielding. Internet-vestnik VolgGASU. Politematicheskaya seriya. 2007. Vol. 2 (3). (In Russian).
13. Umnyakova N.P., Tsygankov V.M., Kuzmin V.А. Experimental heat engineering studies for rational design of wall structures with reflecting heat insulation. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2017. No. 1–2, pp. 38–42. (In Russian). DOI: https://doi.org/10.31659/0044-4472-2018-1-2-38-42
For citation: Umnyakova N.P. Method for evaluating the thermal resistance of foamed polyethylene with reflective heat insulation made of aluminum foil. Stroitel’nye Materialy [Construction Materials]. 2020. No. 6, pp. 44–49. (In Russian). DOI: https://doi.org/10.31659/0585-430X-2020-781-6-44-49