Towards an Analysis of Daylighting Simulation Software

Acosta, Ignacio; Casas, Jaime Navarro; Sendra, Juan J.

doi:10.3390/en4071010

Cited by 39 publications

(19 citation statements)

References 8 publications

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“…We recognize however, that as this study only used one site for each urban form, further evaluation is needed to understand possible variations as influenced by specific geometries of the sites. In addition, while Ecotect has been used in numerous studies for a range of environmental simulations, recent studies also suggest that simulation results differ between Ecotect and other software (Acosta et al 2011) and that Ecotect, like other software, may not accurately predict building energy consumption (Reeves et al 2012). We have however, not come across studies that report on the accuracy of using Ecotect for PAR simulation, which is a more direct process compared to simulation of interior daylight and energy consumption of buildings, and as such could be less prone to differences in simulation results due to different simulation engines used.…”

Section: Discussionmentioning

confidence: 96%

The effects of urban forms on photosynthetically active radiation and urban greenery in a compact city

Tan

Ismail

2015

Urban Ecosyst

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Urban greenery is increasingly recognized as an important component of urban ecosystems as it provides a range of ecosystem services for environmental and human wellbeing. However, the extent to which the performance of urban greenery is affected by availability of light in high-density urban environment is poorly understood. We examined the effect of shade on the levels of photosynthetically active radiation (PAR) in different urban forms, focusing on urban street canyon, vehicular flyovers, sky terraces, at-grade community gardens and rooftop community gardens surrounded by high-rise residential buildings. Within these urban forms, we examined the effects of PAR levels on the growth of shrubs, trees and palms. PAR was assessed though simulation using the building information modeling tool Ecotect, and direct measurements with quantum sensors. PAR was most reduced in sky terraces, with daily PAR restricted to about 15 % of unshaded conditions in Singapore. Daily PAR in rooftop community garden was about 60 % of unshaded conditions, whereas urban street canyon, planting area around and under vehicular flyovers and at-grade community garden had daily PAR of 41 to 52 % of unshaded conditions. Within these shaded environments, almost half of all shrubs and almost all flowering shrubs showed differences in vegetative and reproductive growth at lower PAR levels, respectively. Slenderness of trees was also significantly higher compared to trees grown in more unshaded conditions. The spatial distribution of PAR levels was highly non-uniform, with PAR differing between two and nine-fold within a site, and differed significantly to that of direct sunshine hours. These findings provide insights on how a better understanding of effects of shade on PAR helps to improve urban green space design and plant selection for better plant performance.

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Section: Discussionmentioning

confidence: 96%

The effects of urban forms on photosynthetically active radiation and urban greenery in a compact city

Tan

Ismail

2015

Urban Ecosyst

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“…When using simulation for generating new evidence or to test the validity of evidence, it is also important to consider the validity of the simulation results (i.e., simulation engine, the input to the model, and the output results). Several studies (e.g., [55][56][57][58][59][60][61]) already considered the evaluation of simulation tools.…”

Section: Integration Of Simulation and Ebd Frameworkmentioning

confidence: 99%

A Conceptual Framework for Integration of Evidence-Based Design with Lighting Simulation Tools

et al. 2017

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Abstract:The use of lighting simulation tools has been growing over the past years which has improved lighting analysis. While computer simulations have proven to be a viable tool for analyzing lighting in physical environments, they have difficulty in assessing the effects of light on occupant's perception. Evidence-based design (EBD) is a design method that is gaining traction in building design due to its strength in providing means to assess the effects of built environments on humans. The aim of this study was to develop a conceptual framework for integrating EBD with lighting simulation tools. Based on a literature review, it was investigated how EBD and lighting simulation can be combined to provide a holistic lighting performance evaluation method. The results show that they can mutually benefit from each other. EBD makes it possible to evaluate and/or improve performance metrics by utilizing user feedback. On the other hand, performance metrics can be used for a better description of evidence, and to analyze the effects of lighting with more details. The results also show that EBD can be used to evaluate light simulations to better understand when and how they should be performed. A framework is presented for integration of lighting simulation and EBD.

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“…This significant difference occurs in the area away from the openings. A Research by Acosta (2011) show that the DF value of the artificial sky calculation is relatively higher than obtained by other methods (he compared with various computer simulation programs). As is observed, this condition may be caused by imprecise model making from the difference between color selected for a room SHS Web of Conferences 41, 06001 (2018) https://doi.org/10.1051/shsconf/20184106001 eduARCHsia 2017 model in artificial sky and others method.…”

Section: Fig 7 Df Calculation Pattern (ᵨ = 4%)mentioning

confidence: 99%

“…Daylighting calculation is becoming the valuable need for the designer to optimize its potential in architectural design. Hopkinson (1966) cited by Acosta (2011) in his book Daylighting reveals the complexity of the calculation procedure in daylighting. Currently, a designer has many options in using the daylighting calculation methods.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Daylighting Calculation Methods

Mandala

Santoso

2018

SHS Web Conf.

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Abstract. The aim of this study is to assess five daylighting calculation method commonly used in architectural study. The methods used include hand calculation methods ( SNI/DPMB method and BRE Daylighting Protractors), scale models studied in an artificial sky simulator and computer programs using Dialux and Velux lighting software. The test room is conditioned by the uniform sky conditions, simple room geometry with variations of the room reflectance (black, grey, and white color). The analyses compared the result (including daylight factor, illumination, and coefficient of uniformity value) and examines the similarity and contrast the result different. The color variations trial is used to analyses the internally reflection factor contribution to the result.

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Towards an Analysis of Daylighting Simulation Software

Cited by 39 publications

References 8 publications

The effects of urban forms on photosynthetically active radiation and urban greenery in a compact city

The effects of urban forms on photosynthetically active radiation and urban greenery in a compact city

A Conceptual Framework for Integration of Evidence-Based Design with Lighting Simulation Tools

Comparative Study of Daylighting Calculation Methods

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