Vertical illuminance measurement for clear skies in Tehran

Mohammad Javad Mahdavinejad; Soha Matour; Rima Fayaz

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Vertical illuminance measurement for clear skies in Tehran

Journal article

Open access

Peer reviewed

Vertical illuminance measurement for clear skies in Tehran

Mohammad Javad Mahdavinejad, Soha Matour and Rima Fayaz

Journal of Architecture, Urban Design & Urban Planning, Vol.5(8), pp.11-19

2012

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Abstract

daylight availablity

vertical illuminance

Tehran

To effectively design daylight in buildings, daylight availability data are necessary. Although there is a great potential for daylight energy in Iran, its use has been hampered by the absence of measured data. In this paper the illuminance data on the vertical south facing surfaces of Tehran were estimated using the IESNA model. For this propose an illuminance measuring set was used in order to measure the vertical illuminance for standard times over 17 days at one minute intervals from 9 a.m. to 4 p.m. Then, the measured data were compared with the IESNA model calculated data. A regression model between measured and calculated data was developed, which showed an acceptable linear correlation (r2=0.9535). Also mean hourly and monthly vertical illuminance was obtained from the new equation between measured and calculated data for a whole working year. To estimate daylight availability, IsoKlx lines for working hours and frequency curves for vertical illuminance on south facing surfaces were produced.

Details

Title: Vertical illuminance measurement for clear skies in Tehran
Authors: Mohammad Javad Mahdavinejad (Corresponding Author) - Tarbiat Modares University
Soha Matour (Author) - Tarbiat Modares University
Rima Fayaz (Author) - Tehran University of Art
Publication details: Journal of Architecture, Urban Design & Urban Planning, Vol.5(8), pp.11-19
Publisher: Armanshahr Architecture & Urban Development
Date published: 2012
ISSN: 2008-5079
Copyright note: Copyright (c) 2012. This work is licensed under a Creative Commons Attribution 4.0 International License.
Organisation Unit: University of the Sunshine Coast, Queensland; School of Law and Society
Language: English
Record Identifier: 99679180302621
Output Type: Journal article

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