Annual Daylight Condition in Bratislava

Abstract:

To compute energy demand based on the reference years hourly averages of external variables are often generated in the smooth form. On the other hand, daylight should be evaluated in a shorter interval because human eyes perceive light in the moment of its occurrence. This study shows alternative to the description of annual daylight conditions based on statistic characteristics mean and median to create Daylight Standard Reference Year for Bratislava. Both methods are presented as contribution to the development of daylighting engineering. Authors are interested in lighting engineering to ensure satisfactory luminous environment at workplaces and in buildings for housing and recreation. Good daylighting in interiors is also related to the reduction of electricity consumption for lighting. This paper presents method for generation of daylight standard reference year DSRY based on one minute data measured at CIE IDMP stations. This reference year can be applied for evaluation of daylighting in the specific locality.

• Periodical: Applied Mechanics and Materials (Volume 824)
• Pages: 669-675
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.824.669
• Online since: January 2016
• Authors: Miroslav Fabian*, Dušan Janal, Stanislav Darula
• Keywords: Daylight Test Reference Year, Daylighting, Daylighting Calculation, Illuminance, Irradiance

References

[1] ANDERSEN, B., EIDORFF, S., LUND, H., PEDERSEN, E., ROSENORN, S., VALBOJORN, O. 1977. Meteorological Data for Design of Building and Installation: A Reference Year (extract). Thermal Insulation Laboratory, Denmark: Report No 66, 2nd edition.

[2] CIE: 2004. CIE 108-1994: 2004: Guide to recommended practice of daylight measurement. Vienna: CIE.

DOI: 10.25039/tr.108.1994

[3] ISO 2003. ISO 15469: 2004/CIE SO11/E: 2003: Spatial distribution of daylighting - CIE Standard General Sky. Geneva: ISO.

DOI: 10.25039/ds011.2003

[4] KITTLER, R., DARULA, S., KAMBEZIDIS, H., BARTZOKAS, A. 2001. Daylight climate specification based on Athens and Bratislava data. Proc. The 9th European Lighting Conf. Lux Europa 2001, Reykjavik. Reykjavik: Illuminating Engineering Society of Iceland, 442 – 449.

DOI: 10.1016/j.atmosres.2007.07.001

[5] LIEM, S.H. van PAASSEN, A.H.C. 1984. Establishment of short reference years for calculation of annual solar heat gain or energy consumption in residential and commercial buildings. Final report. Delft: Delft University of Technology.

DOI: 10.1007/978-94-009-7112-7_3

[6] LUND, H. 1995. The Design Reference Year User's Manual. Thermal Insulation Laboratory, Technical University of Denmark, Report 274.

[7] MARKOU, M.T., KAMBEZIDIS, H.D., BARTZOKAS, A., DARULA, S., KITTLER, R. 2007. Generation of daylight reference years for two European cities with different climate: Athens, Greece and Bratislava, Slovakia. Atmospheric Research. 86, 3-4, 315-329.

DOI: 10.1016/j.atmosres.2007.07.001

[8] NG, E., CHENG, V., GADI, A., MU, J., LEE, M., , 2007, Defining standard skies for Hong Kong. Building and Environment. 42, 2, 866 – 876.

DOI: 10.1016/j.buildenv.2005.10.005

[9] PETRAKIS, M., LYKOUDIS, S., KASSOMENOS, P., ASSIMAKOPOULOS, D.N. 1996. Creation of a typical meteorological year for Athens based on daylight measurements. Proceedings of the 7th Conference of Union Hellenic of Physicists and Union Cyprus of Physicists. Heraclion, Crete, Greece (in Greek).

[10] prEN xxxx: 2013. 7. 2013. Daylight of Buildings. CEN/TC 169/WG 11 N 50. Draft.