A flexible and time-efficient schedule-based communication tool for integrated lighting and thermal simulations of spaces with controlled artificial lighting and complex fenestration systems

Vera, Sergio; Bustamante, Waldo; Molina, Germán; Uribe, Daniel

doi:10.1080/19401493.2015.1062556

Cited by 13 publications

(12 citation statements)

References 30 publications

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“…Moreover, some authors showed a beneficial effect on daylight provision [2] and visual comfort [16]. In some cases, the PCM glazing can be treated as an alternative to dynamic shading systems like exterior perforated louvers [17] or other types of blinds [18]. Internal blinds or curtains containing PCMs were further investigated by Silva et al [19] and Weinlaeder et al [20].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Melting Process in Phase Change Material Windows Determined Based on Direct Light Transmission

et al. 2021

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Detailed analyses of melting processes in phase change material (PCM) glazing units, changes of direct transmittance as well as investigation of refraction index were provided based on laboratory measurements. The main goal of the study was to determine the direct light transmittance versus time under constant solar radiation intensity and stable temperature of the surrounding air. The experiment was conducted on a triple glazed unit with one cavity filled with a paraffin RT21HC as a PCM. The unit was installed in a special holder and exposed to the radiation from an artificial sun. The vertical illuminance was measured by luxmeters and compared with a reference case to determine the direct light transmittance. The transmittance was determined for the whole period of measurements when some specific artefacts were identified and theoretically explained based on values of refractive indexes for paraffins in the solid and liquid state, and for a glass. The melting process of a PCM in a glass unit was identified as a complex one, with interreflections and refraction of light on semi layers characterized by a different physical states (solid, liquid or mushy). These optical phenomena caused nonuniformity in light transmittance, especially when the PCM is in a mushy state. It was revealed that light transmittance versus temperature cannot be treated as a linear function.

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Section: Introductionmentioning

confidence: 99%

Dynamics of Melting Process in Phase Change Material Windows Determined Based on Direct Light Transmission

et al. 2021

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“…There is much work done in the sense of profiting daylighting [13][14][15]. Accordingly, complex fenestration systems (CFS) are mostly elements that redirect daylight [16][17][18]. In the PhD dissertation of Basurto [19], a CFS as a prismatic film (PF) combined with window is proposed and she showed that indoor daylight distribution is better than only with the window.…”

Section: Introductionmentioning

confidence: 99%

Transition Planes for Visual Comfort: Out View with Complex Fenestration System Design at Restaurants in Spain

et al. 2021

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This work deals with daylighting for quality indoor atmospheres, considering building skins. In recent years, almost all retrofit facades of restaurants are highly glazed façades, boosting glare, sun ray absorption and overheating inside. Most of the time, they are not integrated with daylight control; therefore, lighting and out view requirements are not so balanced. Taking into account this daylighting complexity, an alternative façade system is proposed to simulate by Radiance. Previously, perception simulations are compared with measured data, in order to discretize the simulations. In addition, for one point three different view are assessed as: work plane, relation plane and the out plane. Subsequently, two virtual façade models, windows combined by complex fenestration system (CFS) as prismatic film (PF) and highly glazed façade, are tested according to daylighting. For that, three indexes have been used: daylight glare probability (DGP), daylight glare index (DGI) and daylight autonomy (DA). The results show that the proposed complex façade has a good light contribution with less absorption, while maintaining the outside view. In addition, the DGI is needed to test the out plane, because DGP is more suitable for lower luminance; therefore, each visual plane should be assessed regarding different visual comfort conditions, or parameters and methods. Accordingly, the mean DGI result of window combined by CFS is approximately lower in 5% than highly glazed façade. However, the DA of highly glazed is higher in 5%, but the DA of window combined by CFS is enough, above 80%. Definitely, the complex scene at restaurant with the proposed integrated façade system improves light performance and indoor atmosphere.

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“…Stazi et al 2014studied the impact of perforated aluminum panels as solar protection system (SPS), on energy consumption and thermal comfort in a Mediterranean climate in Italy. Vera et al (2016) and Bustamante et al (2017) developed a tool for integrating the energy and light analysis of different solar protection systems with highly complex geometries. In particular, solar protection systems with curved and perforated aluminium horizontal slats are studied to implement the analysis during the early design stages of office buildings.…”

Section: Introductionmentioning

confidence: 99%

Solar and lighting transmission in complex fenestration systems with perforated solar protection systems

Bustamante¹,

Uribe²,

Vera³

2018

Healthy, Intelligent and Resilient Buildings and Urban Environments

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Santiago de Chile is a city with a semi-arid climate, with prolonged periods of high temperature and solar radiation. In recent years, in this city, office buildings have been built with high window to wall ratio (WWR) facades. 65% of the office buildings built in the period 2005-2014 have a WWR higher than 60%. Only 5% of these buildings showed an efficient glazed façade solar protection device. One of these systems corresponds to an exterior textile solar protection. This type of systems, together with the perforated screens, could be effective solutions for the solar protection of glazed facades, reducing the cooling energy consumption of buildings, without risking the visual comfort of the occupants. The objective of this research is to evaluate the solar transmission and lighting of seven perforated solar protection systems. Three of these systems correspond to external textile solar protections, and the remaining four are perforated metallic screens. The evaluation was carried out by applying an experimental protocol in two different calorimeters that simulate an office space. In one of the calorimeters, the solar protection systems are installed while the other is used as a reference without any solar protection system. Measurements were made with illuminance sensors and pyranometers. The horizontal illuminance sensors from Konica Minolta (T10) were installed outdoor and at different points inside the calorimeters. Near the facade, vertical indoor and outdoor pyrometers were installed (Kipp Zonnen, CMP11 and Sp Lite 2). The measurements on the north facade are made in summer on clear days. The measurements showed a reduction in solar transmission of 82.1% (metallic screen, 40% drilling) to 94.7% (cloth, 3% drilling) and from 70.8% to 95.4% in the transmission of lighting respectively.

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A flexible and time-efficient schedule-based communication tool for integrated lighting and thermal simulations of spaces with controlled artificial lighting and complex fenestration systems

Cited by 13 publications

References 30 publications

Dynamics of Melting Process in Phase Change Material Windows Determined Based on Direct Light Transmission

Dynamics of Melting Process in Phase Change Material Windows Determined Based on Direct Light Transmission

Transition Planes for Visual Comfort: Out View with Complex Fenestration System Design at Restaurants in Spain

Solar and lighting transmission in complex fenestration systems with perforated solar protection systems

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