Possible Differences in the Standard and Actual Values of Natural Illumination Caused by Not Taking Into Account the Actual Cloud Conditions

The meteorological parameters characterizing the presence of a cloudy sky have been determined and analyzed. It is shown that the state of cloudy sky is not typical for any territories of Russia. In the intra-annual distribution of cloudiness, it is possible to distinguish periods with a predominance of clear or cloudy skies, which vary depending on the circulation processes. For Moscow, one can take a cloudy sky for the prevailing cloudiness only in the autumn-winter period. Based on the data of long-term observations of the Meteorological Observatory of Moscow State University, an assessment of the illumination of horizontal and vertical surfaces was carried out for a clear, cloudy sky and under average cloudy conditions. The illumination of the earth’s surface under cloudy skies and under average cloudy conditions can differ by up to 50%, and the illumination of walls of various orientations can differ several times. During the period of snow cover, with continuous cloudiness of the lower tier, due to multiple re-reflection from snow and clouds, the reflected component of illumination increases to 30% or more. These estimates, taking into account the repeatability of the cloudy sky, give an idea of the discrepancy between the real data and the values presented in the regulatory documents. For the rational use of natural light resources in different geographic regions, it is necessary to take into account the real cloud conditions.

E.V. GORBARENKO^1,2, Candidate of Sciences (Geography)

¹ Lomonosov Moscow State University. Faculty of Geography (Leninskie Gory, Moscow, 119991, Russian Federation)
² Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences(21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)

1. KorkinaYe.V. Criterion of efficiency of replacement of double-glazed windows in the building for the purpose of energy saving. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2018. No. 6, pp. 6–9. (In Russian).
2. Fyong N.T.KH., Solov’yev A.K. Assessment of natural lighting of buildings taking into account sun protection structures under real cloud conditions. Vestnik MGSU. 2020. Vol. 15 (2), pp. 180–200. (In Russian). doi: 10.22227/1997-0935.2020.2.180-200
3. KupriyanovV.N., SedovaF.R. Justification and development of the energy method for calculating the insolation of residential premises. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2015. No. 5, pp. 83–87. (In Russian).
4. CEN European Standard – Daylight in Buildings, EN-17037, 2018.
5. Obolenskiy N.V. Arkhitektura I solntse [Architecture and the Sun]. Moscow: Stroyizdat. 1988. 2015 p.
6. Phuong N.T., Solovyov A.K. Potential daylight resources between tropical and temperate cities–a case study of Ho Chi Minh city and Moscow. Scientific journal Matec Web of Conferences. 2018. Vol. 193. p. 04013. doi.org/10.1051/matecconf/201819304013
7. Darula S. Review of the current state and future development in standardizing natural lighting in interiors. Light Eng. 2018. Vol. 26. No. 4, 25 p.
8. Korkina E.V., Gorbarenko E.V., Pastushkov P.P., Tyulenev M.D. Investigation of the heating temperature of the facade surface from solar radiation under various irradiation conditions. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2020. No. 7, pp. 19–25. (In Russian). DOI:  https://doi.org/10.31659/0044-4472-2020-7-19-25
9. Abakumova G.M., Gorbarenko Ye.V., Nezval’ Ye.I., Shilovtseva O.A. Klimaticheskiye resursy solnechnoy radiatsii Moskovskogo regiona [Climatic resources of solar radiation of the Moscow region]. Moscow: LIBROKOM, 2012. 312 p.
10. Klimat Moskvy v usloviyakh global’nogo potepleniya [The climate of Moscow in the conditions of global warming]. Pod red. Kislova A.V. Moscow: MGU, 2017. 288 p.
11. Nauchno-prikladnoy spravochnik po klimatu SSSR [Scientific and applied reference book on the climate of the USSR], Ser. 3. Part 1–6. Leningrad: Gidrometeoizdat. 1989–1993.
12. Barteneva O.D., PolyakovaYe. A., Rusin N.P. Rezhimy estestvennoy osveshchennosti na territorii SSSR [The mode of natural illumination on the territory of the USSR]. Leningrad: Gidrometeoizdat. 1971. 238 p.
13. Elena Korkina, Igor Shmarov and Matvey Tyulenev. Effectiveness of energy-saving glazing in various climatic zones of Russia. IOP Conf. Series: Materials Science and Engineering. 2020. Vol. 869. 072010. doi:10.1088/1757-899X/869/7/072010
14. Stadnik V.V., Shanina I.N. Evaluation of the natural illumination of the Earth’s surface according to actinometric data. Trudy GGO. 2016. Vol. 580, pp. 110–124. (In Russian).
15. Shilovtseva O.A. The light regime of Moscow in the conditions of smoky haze. Meteorologiya I gidrologiya. 2014. No. 4, pp. 5–17. (In Russian).
16. Gorbarenko Ye.V., Shilovtseva O.A. Natural illumination of horizontal and vertical surfaces according to observations of the Moscow State University MO. Stroitel’stvo I rekonstruktsiya. 2018. No. 4 (78), pp. 53–63. (In Russian).
17. Korkina Ye.V., Gorbarenko Ye.V., Gagarin V.G., Shmarov I.A. Basic relationships for calculation of solar radiation expousure of walls of separate buildings. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2017. No. 6, pp. 27–33. (In Russian).