Calculation of the Coefficient Taking Into Account the Losses of Solar Radiation in the Frames of Window Blocks

When designing modern buildings, great attention is paid to ensuring environmental friendliness and comfort while meeting the requirements for energy conservation. To achieve these effects in the Russian regulatory documents, when calculating natural light and heat gain from solar radiation in the premises of the building, various parameters of filling light gaps are taken into account. One of these parameters is the transmission coefficient of solar radiation, which is equal to the product of the transmission coefficient of the glazing by the coefficient that takes into account the loss of solar radiation in the frames of the window block. The last coefficient is determined by calculation. Obtaining the formula for its calculation was based on lighting modeling. However, at present, calculations on it are difficult due to its bulkiness. In this paper, we adapt this formula for engineering calculations by gradually simplifying it, comparing the calculation results with the original version, and forming the boundaries of its application. The formula includes correction factors presented in tabular form for various sizes of translucent cells of a translucent structure with a fixed thickness of the frame and its reflective properties.

E.V. KORKINA^1,2, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
I.A. SHMAROV¹, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
M.D. TYULENEV², Postgraduate

¹ Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (21, Lokomotivniy Driveway, Moscow,127238, Russian Federation)
² National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)

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