INFLUENCE OF THE DATE OF CALCULATION OF THE INSOLATION DURATION ON THE PARAMETERS OF A COMPACTED BUILDING

Abstract

The influence of the date of computation of insolation duration on the acceptable mutual position
of buildings and their height has been studied. The relevance of the research is explained by
changing of the date of normative insolation computation from March 22 to April 22, which had
been adopted in Russia. The study has been performed using 3D computer modeling of buildings
and building of the fields displaying the duration of insolation on the building walls and surrounding
territories. An algorithm of computing the insolation duration and of building the fields is given.
It is demonstrated that when calculating the insolation with the new date of April 22, it is acceptable
to increase the height of buildings and reduce the distance between buildings by 30 %,
as well as to reduce the angle between a northern building wall and the parallel from 48° to 24°.
The specifics of insolation for L-shape buildings has been revealed. It is shown that with shifting
the calculation date from March to April, the insolation on inner walls decreases. The study of
this special case has been performed. Dependencies have been built for duration of insolation on the
inner walls of L-shape buildings depending on the computation date throughout the year, and on the
increasing of the distance between the calculation point and the angle edge. The geometrical model
explaining the revealed effect is provided.

The examples are given, which show negative manifestations of the revealed effect. Here, new
buildings, calculated for the insolation as of March 22, have been brought to unacceptable insulation
as per April 22 norms.
The studies have been performed in AutoCAD package using the system of automatic computing
and building of insolation fields.