Experimental Determination of the Duration of Insolation Using a Wide-Angle Lens and Solar Maps with Equidistant Projection

It is shown that using the proposed method for measuring the duration of insolation, which is feasible at any time of the year, it is possible to determine the duration of insolation. The method uses a photograph of the light opening and the surrounding building, taken from the room under study using a wide-angle fisheye lens and a solar map with an equidistant projection for the geographical latitude of the construction site. The method is applicable to existing buildings in the absence of a situational or master plan, heights of opposing buildings, differences in ground level. The difference in experimental and traditional calculation methods for determining the duration of insolation may be no more than ±10 minutes. The calculation error by this method depends on the complex configurations of the superstructures on the roof and the architectural elements of the facades, the correct photograph of the window opening and the existing building, the quality of the picture taken.

I.A. SHMAROV, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
V.V. ZEMTSOV, Engineer (zemсThis 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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4. Shmarov I.A., Zemtsov V.A., Guskov A.S., Brazhnikova L.V. Indoor insolation as a means of limiting the spread of COVID-19, influenza and SARS in the urban environment. Academia. Architectura I Stroitelstvo. 2020. No. 4, pp. 83–92. (In Russian).
5. Korkina E.V., Shmarov I.A., Tyulenev M.D. Calculation of the coefficient taking into account the losses of solar radiation in the frames of window blocks. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2021. No. 6, pp. 11–17. (In Russian). DOI: https://doi.org/10.31659/0044-4472-2021-6-11-175