Operation guidelines for daylight dimming control systems in an office with lightshelf configurations

Moon, Jin Woo; Baik, Yong-Kyu; Kim, Soo‐Young

doi:10.1016/j.buildenv.2020.106968

Cited by 9 publications

(5 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the total sky cover during this day is 9 h, from 8:00 to 17:00 (Table 3). As shown by [21], in this case, the effect of the LS on the variation of the thermal environmental condition is insignificant, owing to insufficient daylight. In order to understand how this translates into comfort sensation, Table 6 reports the median value calculated over each reference day of the hourly PMV.…”

mentioning

confidence: 85%

“…The latter authors, in other experimental studies, proposed the use of different surfaces (prism sheets [18] or crystal face [19]) in order to study the refraction and reflection of LSs or also the perforated surface [20] for improving the LSs' wind resistance. Finally, Moon et al [21] provide operation guidelines for a daylight dimming control system in an office with LSs:…”

Section: Introductionmentioning

confidence: 99%

“…From the overview in Table 1 it is evident that the studies in the literature regard above all the analysis of the application of LS in building for increasing the illuminance levels [7][8][9][12][13][14][15]22] and in some cases the connected reduction of the electricity for the artificial lighting [11,13,16,18,19,21,23] by using daylight control devices. However, this technology can also affect aspects related to the heating and cooling need and the indoor thermo-hygrometric comfort, since it modifies not only how the solar gains through the windows are distributed in the room, but also their penetration depth, light intensity, which disrupts the indoor thermal conditions, and the comfort sensation of the people, as stated by [10,17].…”

mentioning

confidence: 99%

“…Moreover, it can be seen that the studies often refer to fixed sky type for the simulations [9,13,14,21,23]. For the deep investigation that the authors intend to do, as discussed above, taking into account sky conditions dynamically changing over the whole year could be better [16].…”

mentioning

confidence: 99%

See 3 more Smart Citations

Multi-Disciplinary Analysis of Light Shelves Application within a Student Dormitory Refurbishment

et al. 2021

View full text Add to dashboard Cite

The achievement of sustainable cities and communities is closely linked to an accurate design of the buildings. In this context, the transparent elements of the building envelope have a crucial role since, on one hand, they are a bottleneck in regards to heat and mass transfers and sound propagation, while, on the other hand, they must allow daylight penetration. Thus, they are responsible for occupants’ thermal and visual comfort and their health. Considering passive solutions for windows, the light shelves can improve natural light penetration, reducing the lights’ electricity demand and controlling windows’ related thermal aspects. The scientific literature is characterized by several studies that analyze this topic, which, however, focus only on the daylight field and sometimes the energy saving for lights. Moreover, they often refer to fixed sky type for the simulations. The aim of the present study is to analyze the application of the light shelves with a multi-disciplinary approach, by means of dynamic simulations, in the EnergyPlus engine, for a whole year. A new methodological approach is presented in order to investigate the technology under different fields of interest: daylight, lighting energy, cooling and heating needs, and thermo-hygrometric comfort. The case study chosen is an existing building, a student dormitory belonging to the University of Athens. It is subject to a deep energy renovation to conform to the “nearly Zero Energy Building” target, in the frame of a European research project called Pro-GET-onE (G.A No. 723747). By means of the calibrated numerical model of this HVAC–building system, ten different configurations of light shelves have been investigated. The best solution is given by the application of an internal horizontal light shelf placed at 50 cm from the top of the window with a depth of 90 or 60 cm. It has been found that despite the reduction in electricity demand for lighting, the variation in heating and cooling needs does not always lead to a benefit.

show abstract

mentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Multi-Disciplinary Analysis of Light Shelves Application within a Student Dormitory Refurbishment

et al. 2021

View full text Add to dashboard Cite

show abstract

“…These rooms are generally not suitable for exploiting daylight properly. Moon et al [32] performed an analysis on the control of the lighting system using photosensors in the room. They performed simulations using Lightscape software.…”

Section: Literature Reviewmentioning

confidence: 99%

Evaluation of the electricity savings resulting from a control system for artificial lights based on the available daylight

Nicoletti

Ferraro²,

Kaliakatsos³

et al. 2022

Acta IMEKO

View full text Add to dashboard Cite

Natural lighting in building environments is an important aspect for the occupants' mental and physical health. Furthermore, the proper exploitation of this resource can bring energy benefits related to the reduced use of artificial lighting. This work provides some estimates of the energy that can be saved by using a lighting system that recognises indoor illuminance. In particular, it is able to manage the switching on of lights according to the daylight detected in the room. The savings from this solution depend on the size and orientation of the window. The analysis is conducted on an office by means of simulations using the INLUX-DBR code. The locations have an influence on the luminance characteristics of the sky. The analysis is conducted with reference to one city in the south and one in the north of Italy (Cosenza and Milan). The energy saving is almost independent of latitude and therefore representative of the Italian territory. it is highly variable according to exposure, being the highest for southern exposure (97% with the window size equal to 36% of the floor area) and between 26% and 48% (as a function of window size) for northern exposure.

show abstract

Selection of spatial sensitivity curve and installation location of photosensors for daylight-linked control systems in space with dynamic shading devices

Thanh

Chan

Phuong

2023

Building and Environment

View full text Add to dashboard Cite

Operation guidelines for daylight dimming control systems in an office with lightshelf configurations

Cited by 9 publications

References 40 publications

Multi-Disciplinary Analysis of Light Shelves Application within a Student Dormitory Refurbishment

Multi-Disciplinary Analysis of Light Shelves Application within a Student Dormitory Refurbishment

Evaluation of the electricity savings resulting from a control system for artificial lights based on the available daylight

Selection of spatial sensitivity curve and installation location of photosensors for daylight-linked control systems in space with dynamic shading devices

Contact Info

Product

Resources

About