Daylight simulations and tubular light guides

Mohelníková, Jitka; Vajkay, František

doi:10.1080/14786450802318426

Cited by 8 publications

(6 citation statements)

References 10 publications

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“…For instance, modeling complicated curved and specular surfaces using the Radiance model's original formulation is difficult or impossible due to backward raytracing and geometrical issues [28]. Although large-diameter light pipes are still handled successfully [98], thin light pipes and optic fiber are best described using the photon map approach [99]. It makes sense to assume that, as of this writing, additional initiatives are being taken to enhance the Radiance model and offer a trustworthy approach to emulating these components.…”

Section: Standard Comparison Techniquesmentioning

confidence: 99%

Systematic Review of Extended Reality for Smart Built Environments Lighting Design Simulations

Mohammadrezaei,

Ghasemi,

Dongre

et al. 2024

IEEE Access

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This systematic literature review paper explores the use of extended reality (XR) technology for smart built environments (SBE) and particularly for smart lighting systems design. Smart lighting is a novel concept that has emerged over a decade now and is being used and tested in commercial and industrial built environments. We used PRISMA methodology to review 270 research papers published from 1968 to 2023. Following a discussion of historical advances and key modeling techniques, a description of lighting simulation in the context of extended reality and smart built environment is given, followed by a discussion of the current trends and challenges.

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Section: Standard Comparison Techniquesmentioning

confidence: 99%

Systematic Review of Extended Reality for Smart Built Environments Lighting Design Simulations

Mohammadrezaei,

Ghasemi,

Dongre

et al. 2024

IEEE Access

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“…Bended light pipes have been studied for both direct and diffuse light concluding that for the angled entrance part, accumulated yearly light output was higher than for the straight pipes due to the larger sun-facing area [100], but bends in pipes body inside the building should be avoided due to the increasing number of interreflections and decreasing efficiency [83,101,102]. Many theoretical and experimental studies addressed different pipe configurations aiming to find calculation models [103,95,[104][105][106][107][108][109][110][111], resulting in more information on weather and design parameter dependence. Vertical light pipes give high and excessive luminous output when Sun's altitude and azimuth are nearly axillary and beam light propagates with minimal interreflections, while diffuse skylight gives uniform luminance with homogenous output during the daylight hours.…”

Section: Vertical Sun Pipesmentioning

confidence: 99%

Daylight Transport Systems for Buildings at High Latitudes

Obradović

Matusiak

2019

Journal of Daylighting

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This paper is a literature study of daylight transport systems aiming at selecting the most appropriate ones for application at high latitudes. It is limited to the systems that transport light at a long distance from the façade and distribute it either in the building core or at a rear place in a room adjacent to the façade. The literature is spanning from the 80s' to the present. It covers the theoretical background and development of the systems from their infancy, through technical development of the design elements and to the adaptation of the systems to different climatic conditions. Since the most literature comes from equatorial and tropical climate, a short contextualization with high latitudes climate is included. Findings are systematized and presented in tables for easier comparison of efficiency, visual comfort, design efficacy, maintenance need, cost and/or availability on the market, and energy-saving potential in different climates. Conclusions confirm that the daylight condition at the location is the main prerequisite when deciding on the type of collector while the building structure and room functionality are the basis for choosing the type of the transport element. Finally, the distribution element showed to be the key factor when discussing applicability in a functional space where the final success depends on human acceptance. This paper can be useful to get an overview of performance characteristics and application preferences of different daylight transport systems or just their components in daylight conditions at high latitudes.

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“…Light pipes however, are expensive, requires maintenance [61] and the performance can be constrained by overcast sky conditions and changeable solar altitudes. Despite light pipes cannot be properly used to substitute windows due to changeable weather conditions, the light pipes can present electricity energy saving alternatives for permanent artificial lighted rooms in buildings, such as, in windowless zones [142].…”

Section: Innovative Daylighting Systemmentioning

confidence: 99%

A review of daylighting design and implementation in buildings

Wong

2017

Renewable and Sustainable Energy Reviews

163

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Daylighting design has become prevalent in modern buildings in the effort to create a more sustainable living environment. Past and recent bodies of research emerged are mainly focused on the different methods of predicting and measuring daylight level and various range of daylighting technologies available. Despite a wide range of developed and commercially available daylighting systems have been reported, their applications have been limited by a lack of studies on their utilisations and high initial costs. Computer simulations have been frequently used in the past to investigate daylighting performance due to reliable and accurate predictions. However, additional simulation time and variable level of skills and knowledge required are major drawback of computer simulations. This paper includes and pools information on all major daylighting design topic in the built environment. The study critically reviews and compares daylighting design principles, strengths and weaknesses of different range of daylighting systems and calculation methods, such as, scale model with artificial sky, full scale model for field measurement, numerical modelling and manual calculation procedures with the aid of diagrams or tables. Such information could be of useful for engineers, researchers and designers to assess the suitability of applying these systems and technologies in different building types and examine the potential of energy and cost savings.

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Daylight simulations and tubular light guides

Cited by 8 publications

References 10 publications

Systematic Review of Extended Reality for Smart Built Environments Lighting Design Simulations

Systematic Review of Extended Reality for Smart Built Environments Lighting Design Simulations

Daylight Transport Systems for Buildings at High Latitudes

A review of daylighting design and implementation in buildings

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