To the Calculation of the Magnitude of the Solar Factor of Sun-Protective Devices

To protect the premises of buildings from excessive heat of solar radiation sun- protective devices of various types are used. The regulatory documents classify sun-protective devices according to the level of sun protection: from a very high level to a low one, which corresponds to the values of the solar factor from 0–0.2 to 0.76–1. However, a method for determining the magnitude of the solar factor for sun-protective devices of various types has not yet been developed. This article presents a method for determining the magnitude of the solar factor for louver-type sun-protective devices. The method is based on taking into account the ratios of irradiation and shading areas of building facades with sun-protective devices at different times of the day. The method takes into account the orientation of the facade, the hours of the day during which irradiation occurs, and, consequently, the amount of solar energy, the design solution and geometric parameters of sun- protective devices. It is shown that for a specific design solution of a sun-protective device, the magnitude of the solar factor changes when the sun moves across the sky.

V.N. KUPRIYANOV, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)Kazan State University of Architecture and Engineering (1, Zelenaya Street, Kazan, 420043, Russian Federation)

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