Natural light design in premises with roof natural lighting system with consideration of lighting effects of the surrounding housing
The article considers the problems connected with new offers on a daylight factor design in premises with roof natural lighting system with account of lighting effect of surrounding buildings. The offers for daylight design are based on a hypothesis of possible use of some design points for side natural lighting of interiors in the design of roof natural lighting. This is connected with a need to account for a lighting effect of neighborhood buildings. This effect must be considered in the case of lighting design for underground or sub-around buildings. These theoretical offers were confirmed with practical experiment results. The problem, discussed in the article has been stated and analyzed before by a number of domestic and foreign authors. These questions arose mainly because of the broad developing activity in the construction of underground and below-ground buildings and structures, mainly bound with public premises. The need of such development can be explained by the lack of vacant city areas, especially in the central parts. Moreover, the construction methods of such a development are much simpler, as compared with traditional construction technologies of above-ground objects. As for indoor lighting conditions in the underground and below-ground buildings, the only possible way to provide sufficient lighting of interiors is an implementation of roof lighting system in the form of skylights or monitors with one-side or two-side glazing. It is obvious, however, that these roof lighting units are influenced by shadowing effect of the surrounding buildings, which can decrease the incoming light flow to the interiors. This point is the main one, which forced the authors to investigate this scientific problem.