Technological Solutions for Increasing the Energy Efficiency of Windows in new Construction and Housing Stock Reconstruction
DOI:
https://doi.org/10.32515/2664-262X.2026.14(45).234-244Keywords:
energy efficiency, window junction, temperature fields, cold bridge, isotherm, THERM, reconstruction, dew pointAbstract
The article considers the problem of increasing the energy efficiency of translucent enclosing structures of residential buildings. Based on computer modeling of temperature fields in the THERM software package, the influence of the geometric parameters of the windows (exterior window trim, the window's position in a wall cross-section) on the thermal performance of the junction is analysed. The effectiveness of using traditional brick exterior casing in new construction is studied and technological solutions are proposed for the reconstruction of existing housing using polystyrene foam exterior casing. The optimal position of a window in a cavity wall is determined to avoid moisture condensation and minimize the possibility of the cold bridges formation.
References
References
1. Pashynskyi, V. A., et al. (2017). Influence of the position of window blocks within the wall thickness on the thermal performance of their junctions. Sciences of Europe, 3(21), 8-13.
2. State Building Codes of Ukraine. (2022). DBN V.2.6-31:2021. Thermal insulation and energy efficiency of buildings. Kyiv, Ukraine [in Ukrainian].
3. State Enterprise “Ukrainian Research and Training Center for Standardization, Certification and Quality”. (2022). DSTU 9191:2022. Thermal insulation of buildings. Method for selecting thermal insulation material for building insulation. Kyiv, Ukraine [in Ukrainian].
4. State Enterprise “Ukrainian Research and Training Center for Standardization, Certification and Quality”. (2014). DSTU-N B V.3.2-3:2014. Guidelines for the implementation of thermal modernization of residential buildings. Kyiv, Ukraine [in Ukrainian].
5. State Enterprise “Ukrainian Research and Training Center for Standardization, Certification and Quality”. (2022). DSTU 9190:2022. Energy efficiency of buildings. Method for calculating energy consumption for heating, cooling, ventilation, lighting, and domestic hot water. Kyiv, Ukraine [in Ukrainian].
6. Farenyuk, Ye. H. (2015). Thermal regime of translucent building envelope structures of modern multi-storey buildings (Doctoral dissertation, National University of Water and Environmental Engineering). Rivne, Ukraine [in Ukrainian].
7. Maref, W., Van Den Bossche, N., Armstrong, M., Lacasse, M., Elmahdy, H., & Glazer, R. (2012). Condensation risk assessment on box windows: The effect of the window–wall interface. Journal of Building Physics, 36(1), 35–55. https://doi.org/10.1177/1744259111411653 DOI: https://doi.org/10.1177/1744259111411653
8. Stolarska, A., Strzałkowski, J., & Garbalińska, H. (2018). Using CFD software for the evaluation of hygrothermal conditions at wall–window perimeters. IOP Conference Series: Materials Science and Engineering, 415, 012046. https://doi.org/10.1088/1757-899X/415/1/012046 DOI: https://doi.org/10.1088/1757-899X/415/1/012046
9. Misiopecki, C., Bouquin, M., Gustavsen, A., & Jelle, B. P. (2018). Thermal modeling and investigation of the most energy-efficient window position. Energy and Buildings, 158, 1079–1086. https://doi.org/10.1016/j.enbuild.2017.10.021 DOI: https://doi.org/10.1016/j.enbuild.2017.10.021
10. Kariuk, A., Rubel, V., Pashynskyi, V., & Dzhyrma, S. (2020). Improvement of residential buildings walls operation thermal mode. In V. Onyshchenko, G. Mammadova, S. Sivitska, & A. Gasimov (Eds.), Proceedings of the 2nd International Conference on Building Innovations (ICBI 2019). Lecture Notes in Civil Engineering, Vol. 73, pp. 75–81. Springer. https://doi.org/10.1007/978-3-030-42939-3_9 DOI: https://doi.org/10.1007/978-3-030-42939-3_9
11. Pashynskyi, M., Dzhyrma, S., Pashynskyi, V., & Nastoyashchyi, V. (2020). Providing the thermal reliability of window junctions during the thermal modernization of civil buildings. Electronic Journal of the Faculty of Civil Engineering Osijek (e-GFOS), (21), 45–54. https://doi.org/10.13167/2020.21.4 DOI: https://doi.org/10.13167/2020.21.4
12. Pashynskyi, V. A., Pashynskyi, M. V., & Dzhyrma, S. O. (2022). Probabilistic analysis of thermal reliability of brick wall joints in residential buildings. Central Ukrainian Scientific Bulletin. Technical Sciences, 5(36), 137–145 [in Ukrainian]. DOI: https://doi.org/10.32515/2664-262X.2022.5(36).2.137-145
13. Windows and Daylighting Group, Lawrence Berkeley National Laboratory. (2025). THERM (Version 7.8.80). Retrieved December 17, 2025, from https://windows.lbl.gov/therm-software-downloads
14. Tukalo, O. S., & Dzhyrma, S. O. (2016). Study of the influence of PVC window position within wall thickness on heat losses of existing residential buildings in the secondary real estate market of Kirovohrad. In Proceedings of the IV All-Ukrainian Student Scientific and Practical Seminar “Experience of Implementing Modern Computer Technologies in the Educational Process” (pp. 59–66). KNTU. [in Ukrainian].
15. State Enterprise “Ukrainian Research and Training Center for Standardization, Certification and Quality”. (2011). DSTU-N B V.1.1-27:2010. Protection against hazardous geological processes, harmful operational impacts, and fire. Building climatology. Kyiv, Ukraine [in Ukrainian].
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Copyright (c) 2026 Stanislav Dzhyrma, Mykola Pashynskyi, Serhii Perun
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