Dependences of relative and absolute glazed area from configuration and common areas of window embrasure

Abstract

The article deals with the economy of electric energy, which is spent on room lighting, because of increasing interests of natural light. As a result of the research, there has been obtained an analytical expression for determination of the absolute and relative glazed area of window embrasure of any configuration. This gives an opportunity (taking into account the costs of manufacturing) to choose a rectangular as the main configuration. It has been proved that only on the dependences of glazed area from window embrasure it is possible to come arrive to a decision with an acceptable range of metal-plastic window sizes in terms of providing high natural illumination of the premises.

Definition of a composite index of glazing rooms

“…According to [14], the area of the glazing, profile and foaming of the WO of a rectangular shape of different areas, with a width/height ratio of 2.73/2.2 was calculated. The calculations were made for rooms the parameters of which comply with the requirements of the current normative documents of Ukraine: DBN V. (Table 1).…”

“…According to the above data, Relux program calculated the value of the DF in the RP for rooms of selected sizes with the parameters given in Table 1. WOs with an area of 0.12-6 m 2 were considered, and the thickness of the non-transparent part was calculated in accordance with [14]. The DF was calculated according to the algorithm for determining global illumination (Radiosity).…”

“…However, this coefficient takes into account the area of the room, so it was taken for further analysis. Since the light-transmitting element of the WO is glazing, instead of the area of the WO it is more correct to take into account the area of the WO glazing (S GL ) [14]. The standardized value of the DF must be provided for the RP, but not on the entire area of the rooms (Fig.…”

“…In order to determine the area of the WO from the obtained value of the CRGI, in accordance with [14], it is necessary to use the WO Coordination Index (i C.WO ) (6) C.WO WO WO , i l h = rel. units.…”

Effective Use of Daylight in Office Rooms

“…where SGL is the TSBE glazing area, m 2 [46], SWS is the working surface area (SWS = 2 ‧ lRP ‧ dRP‧), m 2 , and dRP and lRP are the coordinates of the RP location in the room (Fig. 1), m.…”