Primerjava programov za izračun dnevne osvetljenosti prostorov : diplomska naloga

Kragelj, Blaž (author), Kristl, Živa (mentor), Košir, Mitja (comentor)

V nalogi sem primerjal dva programa za računanje dnevne osvetljenosti v prostorih. Ta dva programa sta Velux Daylight Visualizer 2 in DIALux 4.10 in sta prosto dostopna na spletu. Ugotovili smo, da med njima prihaja do razlik pri računanju notranje osvetljenosti na horizontalni ravnini in s tem povezanega količnika dnevne svetlobe. Tema te diplomske naloge zajema ugotavljanje, do kako velikih odstopanj prihaja med njima in zakaj. S primerjalno analizo sem preveril izračune obeh programov na referenčnih primerih in jih predstavil. Na predpostavljenem prostoru s tipičnimi realnimi parametri in enako postavitvijo oken sem preverjal horizontalno osvetljenost in količnik dnevne svetlobe na delovni ravnini v prostoru. Izračuni so narejeni za različne vrste projektnega neba. Te rezultate sem zbral za referenčne dni in ure v letu, kjer sem upošteval izračun 15-e percentile. Ugotovil sem, da oba programa osvetljenost v prostoru računata pravilno, če primerjamo rezultate znotraj programov se raven osvetljenosti močno razlikuje. S pomočjo analize zunanje horizontalne osvetljenosti se ugotovil, da se ta med programoma razlikuje za 54%. To je glavni vzrok za razlike v absolutnih vrednostih osvetljenosti, ki jih podata programa.

• Language: Slovenian
• Keywords: gradbeništvo, VSŠ, osvetljenost, količnik dnevne svetlobe, zunanja horizontalna osvetljenost, sončna svetloba, nebesna svetloba, CIE 110-1994
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Place of publishing: Ljubljana
• Publisher: [B. Kragelj]
• Year: 2012
• Number of pages: XI, 23 str., 3 pril.
• PID: 20.500.12556/RUL-32702
• UDC: 535.1/.3:699.8(043.2)
• COBISS.SI-ID: 6127457
• Publication date in RUL: 10.07.2015

Secondary language

• Language: English
• Title: Comparison of computer tools for calculation of illuminance in buildings

Abstract

In my thesis I compared two computer tools for calculation of illuminance in rooms. These two programs are Velux Daylight Visualizer 2 and DIALux 4.10 and are free to download. We found out that there are some differences between the results that they give at calculating the interior illuminance on horizontal plane and with it related daylight factor. The theme of this thesis includes determining how the large deviations occur between them, and why.With comparative analysis I verified calculations of both programs and I presented them. On an assumed room with typical realistic parameters and same distribution of windows I verified horizontal work plane illuminance and day light factor in the room. Calculations were made for different types of reference skies. I presented these results for referential days and hours in a year to get the data about 15th percentile. I found that both programs calculate illuminance in the room correctly, when comparing results within the programs, the level of illuminance varies. It showed that the outer horizontal illuminance taken into account by the programs differ by almost 54%. This is the main reason for different absolute values of illuminance, which may be given by the program.

• Keywords: graduation thesis, illuminance, dayligt factor, exterior horizontal illuminance, sunlight, skylight, CIE 110-1994