A comparison of two light-redirecting fenestration systems using a modified modeling technique for Radiance 3-phase method simulations

Santos, Luís; Leitão, António; Caldas, Luisa

doi:10.1016/j.solener.2017.12.020

Cited by 29 publications

(12 citation statements)

References 25 publications

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“…With the scanned detail structure and dimension information, the detailed PDRF geometry model can be built up with the Rhino program, and then the Bidirectional Scattering Distribution Function of the CFS daylight characteristics can be generated using the Radiance genBSDF module, which has been validated by several studies. 14,17,29 With genBSDF , one can output .xml files, which can be read and presented with BSDFViewer . 30 Figure 8 illustrates the incident light and outgoing flux scattering distribution for prism film and prism film plus diffusing layer from BSDFViewer .…”

Section: Methodsmentioning

confidence: 99%

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A study of luminous environment with prism daylight redirecting fenestrations in classrooms

Tian

Lin

et al. 2020

Indoor and Built Environment

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This study explored the classroom luminous environment with prism daylight redirecting fenestrations. The differences between the International Commission on Illumination standard sky and the Perez all-weather sky models were analysed. The study described the method of generating a valid bi-directional scattering distribution functions .xml data for the prism daylight redirecting fenestrations. A new evaluation metric, daylight evenness, was proposed to describe indoor illuminance dispersion. Radiance simulation results indicate that at various solar altitude angles, compared with conventional glazing, the micro-prism film and micro-prism with an added diffuse layer on clerestories can improve the space average illuminance levels 23.2% and 18.7% under the International Commission on Illumination sky, as well as 15.4% and 10.6% under the Perez sky, respectively. The analysis results indicate that prism daylight redirecting fenestrations clerestories can improve indoor illuminance uniformity and daylight evenness when the solar altitudes range from 23.8° to 75°. A method combined field questionnaire and high dynamic range image analysis were conducted for discomfort glare study. Adding a diffused layer to the prism film clerestory is expected to alleviate discomfort glare for east- and west-facing prism daylight redirecting fenestrations clerestory with the daylight glare probability reduction of 3.8% to 21.7% at various solar altitudes. The research results present promising advantages of applying prism daylight redirecting fenestrations at classroom clerestories to improve the daylight luminous environment.

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Section: Methodsmentioning

confidence: 99%

“…Under certain solar altitude angles, PDRF may redirect the sunlight downward and cause glare. 17 Figure 1 illustrates the configuration of a PDRF system on a clerestory daylight window combined with conventional glazing on vision windows, and Figure 2 presents the application of a PDRF in a west-facing classroom.…”

Section: Introductionmentioning

confidence: 99%

A study of luminous environment with prism daylight redirecting fenestrations in classrooms

Tian

Lin

et al. 2020

Indoor and Built Environment

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“…In Architecture, Art History, and Chemistry, for example, 3D visualizations of building designs, physiological functions, and molecular structure bring immediate benefits to both instruction and research in the field. At UC Berkeley, architects use virtual reality simulations as a way of enhancing their understanding of how a proposed building design can optimally accommodate natural light [6]. For Art Historians, one major limiting constraint of their discipline is being able to experience paintings, sculptures, cathedrals, etc.…”

Section: Applications In Academic Settingsmentioning

confidence: 99%

AR/VR Strategy Considerations for Academic Computing Services

McGrath

2019

Proceedings of the 2019 ACM SIGUCCS Annual Conference

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As higher education institutions take up augmented and virtual reality (AR/VR) tools and applications, important choices and challenges arise in deciding how to approach the planning and design of infrastructure, spaces, and the services to be offered. The observations in this paper are based upon early experiences of growing AR/VR spaces and support in one university setting. The emerging services, space designs, and choice of technology and training offered are informed both by consideration of the varied AR/VR environments being explored in the curriculum as well as a general interest in supporting AR/VR use by individuals and groups in non-curricular settings. The goals of this paper include: 1) briefly surveying commonalities and differences of AR and VR as they're being applied to teaching and learning; 2) considering service design approaches and decision points around AR/VR technologies; 3) and noting challenges for developing sustainable approaches to AR/VR support.

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“…The authors highlight the improvement of rule-based and sensor-based methodologies to include more complex criteria. Mentions of multi-objective optimization refer not for control of dynamic shades but to design of fixed external shading systems [12][13][14][15][16], positioning of interior movable shading [17,18] and to the overall design of the façade [19].…”

Section: Introductionmentioning

confidence: 99%

Occupant-centered optimization framework to evaluate and design new dynamic shading typologies

et al. 2020

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Dynamic solar shading has the potential to dramatically reduce the energy consumption in buildings while at the same time improving the thermal and visual comfort of its occupants. Many new typologies of shading systems that have appeared recently, but it is difficult to compare those new systems to existing typologies due to control algorithm being rule-based as opposed to performance driven. Since solar shading is a design problem, there is no single right answer. What is the metric to determine if a system has reached its optimal kinematic design? Shading solutions should come from a thorough iterative and comparative process. This paper provides an original and flexible framework for the design and performance optimization of dynamic shading systems based on interpolation of simulations and global minimization. The methodology departs from existing rule-based strategies and applies to existing and to complex shading systems with multiple degree-of-freedom mobility. The strategy for control is centered on meeting comfort targets for work plane illuminance while minimizing the energy needed to operate space. The energy demand for thermal comfort and work plane daylight quantity (illuminance) are evaluated with Radiance and EnergyPlus based on local weather data. Applied to a case study of three typologies of dynamic shading, the results of the methodology inform the usefulness and quality of each degree-of-freedom of the kinematic systems. The case study exemplifies the iterative benefits of the methodology by providing detailed analytics on the behavior of the shades. Designers of shading systems can use this framework to evaluate their design and compare them to existing shading systems. This allows creativity to be guided so that eventually building occupants benefit from the innovation in the field.

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A comparison of two light-redirecting fenestration systems using a modified modeling technique for Radiance 3-phase method simulations

Cited by 29 publications

References 25 publications

A study of luminous environment with prism daylight redirecting fenestrations in classrooms

A study of luminous environment with prism daylight redirecting fenestrations in classrooms

AR/VR Strategy Considerations for Academic Computing Services

Occupant-centered optimization framework to evaluate and design new dynamic shading typologies

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