The proposed method for calculating natural lighting in school classrooms makes it possible to more accurate calculate the illumination, taking into account the complex geometry of the premises and the characteristics of the cloudy sky. It is known that the presence of natural light strengthens the immune system and the psychological state of pupils. Taking into account the distribution of brightness across the sky makes it possible to more accurately calculate the luminous flux entering the room. The results of calculations are presented in the form of graphs, diagrams and visualizations that make the information clear and understandable. It is shown that taking into account the uneven distribution of the brightness of the firmament in cloudy skies makes it possible to more accurately calculate the luminous flux entering the school classroom through window openings and gives higher results (at least 10% than the calculation using the traditional method of SP 367.1325800.2017 “Residential and public buildings. Rules for the design of natural and combined lighting”).

In order to reduce energy consumption for heating, ventilation and air conditioning, multi-functional and sun-protective glazing is installed in translucent faсades. In this case, the coefficient of transmittance of visible light and solar radiation is used in calculations of the coefficient of natural illumination of building premises and incoming solar radiation. These coefficients are determined at normal incidence of solar radiation on the glazing, according to normative documents. However, in real conditions, the angle of incidence is different from the normal angle of incidence. National and foreign research works on this issue have been carried out in laboratory conditions, while in fieldwork the effects related to the physical processes of interaction of radiation with sun-protective coatings may appear. At present, research is being carried out in NIISF RAASN to determine the empirical dependence of transmittance coefficients of glazing with special coatings on the angle of incidence of sunlight. This paper is part of this research and deals with the determination under in-situ conditions of the transmittance of solar radiation in the visible range by glazing with multifunctional and sun-protective coatings as a function of its orientation on the sides of light.

AbstractDay lighting of premises under conditions of compacted urban development is depended of brightness of the finishing material of the facades of buildings of the surrounding buildings. Measure of influence of opposing buildings on the light regime of the premises is determined by relative brightness coefficient of facade, which is the ratio of the brightness of the facade to the average brightness of the sky. Derivation of the formula for coefficient of relative brightness of the facade in L-shaped urban buildings is presented. The derivation of the formula is based on the some components. The first component is the light transmission rate component on the facade of the designed building, which takes into account the reflection of daylight from an area of the earth’s surface. The second component is a coefficient, which takes into account the increase in the light transmission rate component on the facade of the projected building. This is due to the exchange of reflected light fluxes between the facades of the buildings and the land surface, which is adjoined to the buildings. Relative brightness coefficient values are calculated depending on the building geometry and the reflective properties of the facade finishing material.

ВЛИЯНИЕ ЦИФРОВЫХ РЕКЛАМНЫХ КОНСТРУКЦИЙ НА ПРИЛЕГАЮЩУЮ ЖИЛУЮ ЗАСТРОЙКУШМАРОВ И