Analytical tests for investigating the accuracy of lighting programs

Maamari, Fawaz; Fontoynont, Marc

doi:10.1191/1365782803li069oa

Cited by 24 publications

(19 citation statements)

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“…The discrepancy indicates the possibility of IES-VE not registering the adjacent buildings blocking the daylight which needs to be further investigated. The measured DF is found to be constantly higher than what radiance simulated, this may be due to the unrealistic CIE Overcast Sky which does not represent the actual dynamic sky condition as argued by many reviews [6,16,18,21,23] …”

Section: Radiance and Daylight Factormentioning

confidence: 89%

Practicality and Performance of Daylight Trough in The Tropics: A Case Study

Gene-Harn

Reimann²,

Bhaskaran³

et al. 2016

MATEC Web Conf.

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Abstract. The field of office daylighting is vital for both energy efficiency practice and occupants' visual comfort. With the emergence of green building in Malaysia, building designers are exploring avenues for energy efficiency design; one common strategy is daylighting. The majority literature reviews on daylighting are skewed towards temperate or developed countries, where sky luminous condition is different from that of the Tropics. Conventional daylighting system designs redirect daylight from the envelope or atrium openings, such as light shelves. Presumed to be the pioneer daylight trough in the Tropics, this paper presents the simulated and in-situ lighting level measurements prior to occupancy. This case study presents an as-built daylight trough design which is able to daylight the office space as deep as 6 meters sufficiently. It achieves a lighting power density 1.90W/m 2 and saves 39.2% of lighting energy over conventional office lighting energy. Discussed further is the practicality of working with such a system, including cost implication, return on investment and contractual challenges in reaching a consensus on the design. The results reinforce that the effectiveness of daylighting design is very dependable on the sun path and obstacles surrounding the office tower. The RADIANCE simulation correlates well to field measurement results. Further investigation into the light trough, its lighting energy savings, users' interaction, visual comfort, and glare is still ongoing.

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Section: Radiance and Daylight Factormentioning

confidence: 89%

Practicality and Performance of Daylight Trough in The Tropics: A Case Study

Gene-Harn

Reimann²,

Bhaskaran³

et al. 2016

MATEC Web Conf.

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“…Maamari and Fontoynont (2003) mentioned that replicating built realities or scale models introduce uncertainties. These include measurements, geometry and photometric properties of materials (such as lamp depreciation and surface reflectivity).…”

Section: C) Standardized Comparison Methodsmentioning

confidence: 99%

“…Models at that time were found to be time-static. The work of Task 21 was continued by Maamari and Fontoynont (2003), who developed a set of test scenarios. These would serve as the basis for the CIE test cases (Maamari et al 2006a).…”

Section: B) Validations Under Controlled Laboratory Settingsmentioning

confidence: 99%

State of the art in lighting simulation for building science: a literature review

Ochoa

Aries

Hensen

2012

Journal of Building Performance Simulation

120

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, J. L. M. (2012). State of the art in lighting simulation for building science : a literature review. Journal of Building Performance Simulation, 5(4), 209-233. DOI: 10.1080209-233. DOI: 10. /19401493.2011 General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. This paper examines the current state of the art in lighting simulation related to building science research. Discussion on historical developments and main modelling approaches is followed by describing lighting simulation within the design process, where it is applied beyond presentation renderings. Works are grouped using the main aspects of a program (input, modelling, and output). Lighting simulation currently focuses on representing accurately a large number of common situations encountered by building designers and researchers. Existing models apply roughly the same theoretical algorithms and calculation aids, limiting representation of certain physical phenomena. Although some models can be used for element design, they are not practical enough to develop or prototype new, untested elements. Elaborate building components require separate analysis through complex simulation aids. Few tools support the early architectural design process. Simplification applies when integrating lighting simulation to whole-building simulation. Input quality affects accuracy, while output needs careful expert interpretation.

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“…Daylight simulation programs have been validated, and their use is widespread (Love and Navvab, 1991;Maamari and Fontoynont, 2003). In particular, virtual models have been proved to be a inexpensive and useful method to quantify the energy savings in road tunnels (Peña-García et al, 2012).…”

Section: Computational Simulationmentioning

confidence: 99%