Model of heat-wind regime of building walls with lout sun protection device

The article discusses the energy efficiency of walls with louvered sun shading devices. It has been noted that louvered façade systems with a ventilated layer are an effective means of protection from solar radiation in summer. As a result of the experimental studies carried out on building models, a number of significant thermophysical regularities were noted that determine heat and wind processes in the near-wall layer of facade systems, which can rightfully be applied in the actual design, construction and operation of objects. Prerequisites and conditions have been created for the development of a universal methodology for assessing heat and wind processes, determined by geometric and physical similarity when modeling processes in the near-wall air environment in solving architectural and structural problems of various compositions. It has been established that the effectiveness of ventilation of the wall layer of air and the first unbuilt column floor is achieved by using façade louvered sun-protection devices with an angle of inclination of their lamellas of 45° - 60° to the plane of the facade during their insolation. The energy efficiency of building walls was revealed through the use of sun-protection louver devices. Prerequisites for the architectural and construction design of external walls with louvered sun-protection devices have been determined that contribute to the formation of convective flows in the wall layer of air, which can subsequently be used for heating premises, as well as for extracting exhaust air from premises by determining the location of natural supply and exhaust openings and the operating mode of windows sashes, transoms, vents.

1. Spiridonov A.V., Shubin I.L., Rimshin V. I. Semin S.A. Sun protection devices: European and Russian rationing practice. AVOC. 2014. No. 5. Pp. 44-52.

2. Obolensky N.V. Architecture and the sun. M.: Stroyizdat, 1988. 207 p.

3. Kupriyanov V.N. On the calculation of the magnitude of the solar factor of sun protection devices. Housing construction. 2021. No. 11. Pp. 40-45.

4. Dvoretsky A.T., Spiridonov A.V., Shubin I.L., Klevets K.N. Consideration of climatic features in the design of sun protection devices. Lighting equipment. 2018. No. 2. Pp. 52-55.

5. Stetsky, S.V., Dorozhkina E.A. Improving the quality of the light, acoustic and insolation environment in the premises of civil buildings with the use of stationary sun protection devices. Innovation and investment. 2021. No. 4. Pp. 193-196.

6. Makhmudov R.M., Kholmurodova Z.I., Almamedova A.T., Babanazarov S.S. Sun protection devices used in Central Asia. Bulletin of the Volgograd State University of Architecture and Civil Engineering. Series: Construction and Architecture. 2022. No. 3 (88). Pp. 148-155.

7. Klevets K.N., Gnevko Yu.D. Effectiveness of sun protection devices. Economics of construction and environmental management. 2020. No. 2 (75). Pp. 108-115.

8. Didenko S.I., Usikov S.M. Energy saving when using kinetic sun protection devices. Bulletin of the Moscow Automobile and Road State Technical University (MADI). 2020. No. 3 (62). Pp. 92-97.

9. Karaseva L.V. Sun protection of buildings: stages and perspectives of development. Materials Science Forum. 2018. Т. 931. Pp. 759-764.

10. Kuhn T.E., Buhler C., Platzer W.J. Еvaluation of overheating protection with sun-shading systems. Solar Energy. 2001. Т. 69. No. 56. Pp. 59-74.

11. Apeh S.O. Modern architecture of african countries. Era of Science. 2018. No. 16. Pp. 238-240.

12. Ahmed M.G., Gawad M.A. Аrchitecture sustainability and energy efficiency. International Journal of Energy Production and Management. 2022. Т. 7. No. 3. Pp. 257-264.

13. Blázquez T., Suárez R., Sendra Ju.J. Protocol for assessing energy performance to improve comfort conditions in social housing in a spanish southern city. International Journal of Energy Production and Management. 2017. Vol. 2. Issue 2. Pp. 140–152.

14. Cheng Y., Nin J., Gao N. Thermal comfort models: A review and numerical investigation. Building and Environment. 2012. Vol. 47. Issue 1. Pp. 13–22. doi: 10.1016/j.buildenv.2011.05.01

15. Masyonene A.R., Masyonis A.I. Use of solar-protective structures in transparent facades of the big area for passive compensation heat loss to maintain a comfortable microclimate of premises. International Research Journal. 2019. No. 8-2 (86). С. 83-85.

16. Beregovoy A.M., Beregovoy V.A., Grechishkin A.V., Voskresensky A.V. Enclosing structures with adjustable parameters of heat and mass transfer. Regional architecture and construction. 2018. No. 1 (36). Pp. 97-101.

17. Bosenko T.M. Modeling of nonequilibrium processes of thermal conductivity under thermal effects on the surface of multilayer materials. Space, time and fundamental interactions. 2018. No. 4. Pp. 104-109.

18. The use of solar radiation data in the national economy. Proceedings of the International Symposium on the practical use of actinometric information // edited by T.G. Berlyand. L., Hydrometeoizdat 1979. 145 p.

19. Mansurov R.Sh., Fedorova N.N., Efimov D.I., Kosova E.Yu. Mathematical modeling of thermal characteristics of external fences with air layers. Engineering and Physics journal. 2018. Vol. 91. No. 5. Pp. 1287-1293.

20. Mikheev M.A., Mikheeva I.M. Fundamentals of heat transfer. M.: Energy 1977. 344 p.

21. Bogoslovsky V.N. Construction thermophysics. M.: Stroyizdat, 1982. 115 p.

22. Elterman V.M. Ventilation of chemical industries / V.M. Elterman – M.: Book on demand, 2021. 284 p.

23. Giyasov A.I. Mirzoev S.M., Karum Abdulrahman Modeling of heat-wind processes of the wall layer of enclosing structures of buildings during insolation. Bulletin of MGSU. 2022. Vol.17. Issue 3 Pp. 285-297. doi: 10.22227/1997-0935.2022.3.285-297.

24. Giyasov A. Investigation of thermal wind processes on the model of residential development of cities with a hot-calm climate. Proceedings of Higher educational institutions. 1989. No. 6. Pp. 43-46.