The article considers the buildings of medical and preventive, children's educational and educative institutions. The resistance to heat transfer of the windows is not increased for such buildings at the last change in the norms of thermal protection in the Russian Federation in 2018. In this regard, it is important to check compliance with the requirements of regulatory documents for radiation temperature and asymmetry of the radiation temperature at the boundary of the serviced area of the premises of such buildings. A literary review has shown that much attention is paid to these parameters in the world. Since the heat transfer resistance of the windows is much less than that of the outer walls, the influence of the outside air temperature on the temperature of the inner surface of the window is much greater than that of the walls. The proposed article considers a corner room of an intermediate floor with windows in the outer walls, occupying 35% of the area of the external enclosing structures in Belgorod. The building is serviced by air heating. A comparison of the radiation temperature and the asymmetry of the radiation temperature with the same indicators in the ordinary room considered earlier showed that with windows of the specified size, the influence of the second window significantly reduces the radiation temperature and increases the values of the local asymmetry of the radiation temperature. At the same time, during the estimated winter period optimal and permissible requirements of the regulatory document are not met at the border of the serviced area of the premises
In the cold season, maintaining the desired room temperature is often provided by instrument heating, designed to compensate for heat losses. In this case, the temperature stratification along the height of the room, created by the convective heat flow from the heater, is usually not taken into account. According to the established design practice, the choice of the heating surface is carried out according to the temperature averaged over the volume of the room. At the same time, there is a high risk of underheating of the working area, especially in the cold part of winter in areas with a low temperature of the coldest five-day period. To study this issue, calculations were performed using the Ansys Fluent software package. The simulation of the process of heat and mass transfer in the volume of the room under known boundary conditions was carried out for the formation of a "thermal cushion" and the determination of the air temperature in the working and upper zones of the room.
Radiation cold flows from the windows in the winter period play an important role in the formation of the room overall thermal microclimate. The compliance with the requirements of GOST 30494–2011 for the resulting temperature and the local asymmetry of the resulting temperature in the centre of the room, as well as the boundaries of its serviced area, is not subject to any verification during the expert examination of the building projects. The designers do not perform such a check due to the absence of a method for calculating the influence of the temperature of all surrounding surfaces on these indicators. The standards for reduced heat transfer resistances of windows in residential and commercial public buildings have recently been increased. However, for the buildings of medical and preventive, preschool educational, general education institutions, and boarding schools these standards have remained the same. In the proposed work, the problem of the indoor microclimate parameter assessment is solved by calculations using the example of a library reading room with higher thermal protection of the windows and a classroom of the art school, where the window thermal protection has remained the same, in the city of Irkutsk. The percentage of the facade glazing in both cases was 34.5 %. The calculations, which have been made for the coldest calculation period, showed that for windows with an increased heat transfer resistance, the heating devices of the water heating system neutralize the cooling effect of the window radiation fluxes. In the rooms with an air heating system, the optimal norms of the resulting temperature are not met. For various regions of Russia, provision should be made of larger studies as to the combinations of the window heat transfer resistance and the window size to follow the daylighting standards, when the norms of the resulting temperature and the asymmetry of the resulting temperature are not possible to be met.
The article considers the buildings of the transport infrastructure that provides services to transport workers, e.g. medical and preventive, children's educational and educative institutions. The resistance to heat transfer of the windows was not increased for such buildings at the last change in the norms of thermal protection in the Russian Federation in 2018. In this regard, it is important to check compliance with the requirements of regulatory documents for radiation temperature and asymmetry of the radiation temperature at the boundary of the serviced area of the premises of such buildings. A literary review has shown that much attention is paid to these parameters in the world. Since the heat transfer resistance of the windows is much less than that of the outer walls, the influence of the outside air temperature on the temperature of the inner surface of the window is much greater than that of the walls. The proposed article considers a corner room of an intermediate floor with windows in the outer walls, occupying 35% of the area of the external enclosing structures, in Belgorod. The building is serviced by air heating. A comparison of the radiation temperature and the asymmetry of the radiation temperature with the same indicators in the ordinary room considered earlier showed that with windows of the specified size, the influence of the second window significantly reduces the radiation temperature and increases the values of the local asymmetry of the radiation temperature. At the same time, during the estimated winter period, not only optimal, but also permissible requirements of the regulatory document are not met at the border of the serviced area of the premises.
According to the regulatory documents in force in the Russian Federation, the measurement of the normalized indoor environment indicators should be carried out with a ball thermometer. These norms also apply to the premises of the transport infrastructure buildings. In this paper, the values of the radiation temperature tr and the local asymmetry of the radiation temperature dtr as to the ball thermometer have been estimated by calculation. An ordinary room of an intermediate floor with a window in the outer wall with a width of 3.8 m and a height of 1.8 m, the bottom of which is located at a height of 1 m from the floor, in Belgorod, has been subject to consideration. The room is provided by an air heating. The values of the asymmetry of the radiation temperature at the boundary of the serviced area of the room, that is, at a distance of 0.5 m from the outer wall, at a height of 1.7 m and 1.1 m from the floor in the calculated winter conditions exceed the optimal ranges limited by norms. It is shown that with an increase in the resulting room temperature, the values of the radiation temperature asymmetry also increase. The presented distributions of the radiation temperature over the volume of the room indicate that in the calculated winter conditions, the optimal requirements for tr values are not met at the same heights of 1.7 m and 1.1 m from the floor. Acceptable conditions meet the requirements of the norms.
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