Environmental Engineering Reference
In-Depth Information
High-rise office blocks with different site densities were also analysed for south-
ern German climatic conditions. The 10-storey reference building has 24.4 m depth,
24.4 m length and 30 m height. The energy consumption of the office room's
daylight-controlled artificial lighting was evaluated for different site coverage (see
Figure 18.16.3). The required illumination level of the office room is 500 lux and
the artificial lighting system was designed to supply this level.
When the shading effect due to the surrounding buildings is taken into account, the
electric lighting demand increases. The shading effect results in less cooling requirement
due to a decrease in solar gains. The simulated annual heating demand increases from
36 kWh m 2 a 1 to 40 kWhm 2 a 1 . At 60% site coverage, the annual cooling loads
decrease to 17 kWh m 2 a 1 , which is about 36% less than at 30% site coverage.
For non-residential buildings with a higher demand in lighting electricity, the sim-
ulation results showed that between 4.5% and 35% of lighting electricity demand can
be saved by the site design. For high-rise office buildings the daylight responsive electric
lighting demand rises from 5 kWh/m 2 for 30% site coverage to 8 kWh/m 2 for 60% site
coverage. If no daylight responsive strategy is used, the electric lighting demand would
be 36 kWh/m 2 , which is 5 times as much in the worst case. For cooling-dominated
climate conditions, the site design should focus on reducing the cooling load, but the
daylighting illuminance level and the electric lighting loads should also be considered.
ACKNOWLEDGEMENTS
The graphical design, text editing and corrections were done by Silvio Barta who is
thanked for his valuable contributions. The urban analysis simulations were done by
PhD student Aysegül Tereci, supported by daylighting simulations done by PhD student
Dilay Kesten, both participating in the European PhD network CITYNET.
REFERENCES
EN 12464-1:2002, Light and lighting—lighting of work places—Part 1: indoor work places .
Brussels, Belgium: Comite' Europe'en de Normalisation.
Buschendorf, Hans-Georg (Hrsg.): Lexikon Licht- und Beleuchtungstechnik . Verlag Technik,
Berlin 1989, ISBN 3-341-00724-5, S. 64.
Hentschel, H.-J. (2002) Licht und Beleuchtung: Theorie und Praxis der Lichttechnik , Hüthik
Verlag.
Martin, L. and March, L. (Eds) (1972) Urban Space and Structures , Cambridge University
Press, UK.
Steemers, K. (2003) Energy and the city: density, buildings and transport. Energy and Buildings ,
35 3-14.
Steadman, J.P (1979) Energy and patterns of land use. In: Watson, D. (Ed.) Energy.
Search WWH ::




Custom Search