Thermal testing of the light pipe prototype

Omishore, Ayodeji; Kalousek, Miloš; Mohelnik, Petr

doi:10.30765/er.39.3.09

Cited by 5 publications

(3 citation statements)

References 21 publications

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“…In 2019, Omishore [13] experimented with a light pipe prototype associated with an active collection device (parabolic collector with concentrating mirror). The device is subjected to an artificial IR light source (controlled environment).…”

Section: A Short Review On Thermal and Spectral Light Pipe Investigat...mentioning

confidence: 99%

“…The angle of incidence affects the spectral transmittance: (i) less than 50°: wavelengths between 400 and 800 nm (visible); more significant than 50°: from 400 to 1000 nm (visible + near IR) Shao and Riffat [11] Under cloudy skies, the number of IR rays is about three times lower and more uniform than under clear skies Callow [12] Nilson et al [10] PMMA (collector material) favors the transmission of visible and near IR wavelengths while effectively limiting the medium and far IR Omishore [13] Significant increase in the surface temperature of the light pipe in response to IR radiation…”

Section: Reference Findingsmentioning

confidence: 99%

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Thermal and spectral impact of building integrated Mirrored Light Pipe to human circadian rhythms and thermal environment

Malet-Damour¹,

Fakra²

2021

International Journal of Sustainable Energy

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Light holds an important place in the way of life of humans. The first type of lighting which could be exploited was daylight. Tubular Daylight Guidance Systems (TDGS) transport and distribute this daylight inside a building. This article focuses on one of the best known: the Mirrored Light Pipe. MLPs are multiple specular reflectance transporters. This paper presents (i) state of the art on thermal and spectral studies on light pipes from 1998 to 2021 and (ii) proposes an experimental analysis on MLP in the climatic environment with a high solar resource for different spectral bands of the daylight spectrum. The results show that the thermal impact of the light pipe is limited. Moreover, it is demonstrated that this device promotes natural circadian rhythms. A comparison with artificial lighting highlights this device as an ideal solution for bioclimatic building design.

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Section: A Short Review On Thermal and Spectral Light Pipe Investigat...mentioning

confidence: 99%

Section: Reference Findingsmentioning

confidence: 99%

Thermal and spectral impact of building integrated Mirrored Light Pipe to human circadian rhythms and thermal environment

Malet-Damour¹,

Fakra²

2021

International Journal of Sustainable Energy

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“…The introduction of skylights reduces dependence on artificial lighting and significantly reduces energy consumption and operating costs, as well as positively affects the overall carbon footprint of buildings [24][25][26]. In the case of large buildings, it is possible to use light pipes instead of artificial lighting [27,28].…”

Section: Introductionmentioning

confidence: 99%

Influence of Light Reflection from the Wall and Ceiling Due to Color Changes in the Indoor Environment of the Selected Hall

et al. 2022

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The main goal of this paper is to evaluate the effect of color changes on the interior surfaces of a selected hall on the level of daylight, represented by the DF factor. A single-story hall was chosen as the reference building, in which daylight falls through the side windows and a skylight at roof level. Measurement of the level of daylight in the real state of the building (in situ) was carried out. The measurement took place when the external boundary conditions of the measurement were met (external state of the sky). A survey was conducted among users, in which they considered the visual perception of the environment and what colors would be suitable for the walls, ceiling, and floor in the working environment of the hall. The evaluation of the respondents who considered the color of the floor was interesting, and several agreed that the floor should be brown. After debugging the model for the simulation based on the actual state of the measurement, simulation calculations were performed with selected surface colors in the interior of the hall. Computational simulations were performed for changing calculation boundary conditions. Daylight Factors (DF) (%) were evaluated, namely minimum, maximum, and average DF values for 15 selected simulations. The calculations were performed in the RADIANCE simulation program. Simulations included the change in the surface color of the simulated wall and the current ceiling surface color, the color of the simulated ceiling surface and the current wall surface color, and the color of the simulated wall and ceiling at the same time. The floor color did not change during the evaluation; it was considered brown. Based on the evaluation of AHP, evaluations of the significance and comparability of colored areas were performed. The value of the average DF was chosen as the most important, the less significant minimum DF value was chosen, and the maximum DF value was considered in the last place. The results show that white, gray, green, or yellow walls, white ceiling, and brown floor were rated as the most suitable for the interior surfaces in the considered hall.

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Preserving the historical value and thermal properties of renovated buildings: The case of reconstructed town houses in Kosice, Slovakia

Katunský,

Katunská,

Dolníková

et al. 2024

Frontiers of Architectural Research

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Thermal testing of the light pipe prototype

Cited by 5 publications

References 21 publications

Thermal and spectral impact of building integrated Mirrored Light Pipe to human circadian rhythms and thermal environment

Thermal and spectral impact of building integrated Mirrored Light Pipe to human circadian rhythms and thermal environment

Influence of Light Reflection from the Wall and Ceiling Due to Color Changes in the Indoor Environment of the Selected Hall

Preserving the historical value and thermal properties of renovated buildings: The case of reconstructed town houses in Kosice, Slovakia

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