090926 Sunlight Study 01

I have done the first sunlight study on the proposed site. From my preliminary sketches in previous post, I proposed two towers on the east and west of the site to create a grand central axis connecting the Perth Concert Hall to the river.

The sunlight study is essential to see how high the towers can be and how the towers will impact on the site and the surrounding. Major issues would possibly be Views and Shadows.

In the first run, I have set the west tower at 300m high and the east tower at 220m high to see how much shadow they will cast around the site.









The date for lowest sun angle (winter) and highest sun angle (summer) is from the Sun Angle Calculator in Vray Rhino. It is more accurate than the 3ds max one.



In Perth, the lowest winter sun angle is on 2009-06-22 with Azimuth of 5.22113' and Altitude of 34.3702'. The highest sun angle is on 2009-12-17 with Azimuth of 18.9663' and 80.8911'. Here are the first set of results:

In Winter:




In Summer:




In winter, two towers will not cast shadow over surrounding buildings but not for the summer sun. The results show that there will be sometime that the Tower 1 (300m) will cast shadow on 1) east building of Swan Bell Tower 2) Tower 2 (220m) and 3) east building of Perth Concert Hall.

I guess it is possible to have perfect shadow if I flip the height of the two towers the other way round, i.e. Tower 2 is 300m and tower 1 is 220m.

From the sunlight study, the height of the towers can be determined. So hopefully, the result from second sunlight is positive which will be tested tomorrow.