Journal of Daylighting最新文献_第4页

Journal of Daylighting Pub Date : 2022-06-01 DOI: 10.15627/jd.2022.8

引用次数: 0

Design and Simulation of a Circadian Lighting Control System Using Fuzzy Logic Controller for LED Lighting Technology 基于模糊逻辑控制器的LED照明控制系统的设计与仿真

Journal of Daylighting Pub Date : 2022-05-26 DOI: 10.15627/jd.2022.5

Sivachandran R. Perumal, F. Baharum

{"title":"Design and Simulation of a Circadian Lighting Control System Using Fuzzy Logic Controller for LED Lighting Technology","authors":"Sivachandran R. Perumal, F. Baharum","doi":"10.15627/jd.2022.5","DOIUrl":"https://doi.org/10.15627/jd.2022.5","url":null,"abstract":"This paper introduces a fuzzy logic-based circadian lighting control system using flexibility of Light-Emitting Diode (LED) lighting technology to synchronise artificial lighting with circadian (natural) lighting Correlated Colour Temperature (CCT) characteristics. Besides for vision acuity, the Non-Imaging Forming effects of lighting affect human circadian rhythms. Past works in spectrally tuning CCT or Spectral Power Distribution of lighting have used conventional Proportional-Integral-Derivative (PID) control system architecture, where the modelling process of system transfer functions was mathematically complex, especially for nonlinear systems. A methodology of regulating lighting CCT is employed in a 7×5 fuzzy logic rules matrix in a Fuzzy Logic Controller (FLC) system, to closely replicate natural lighting CCT characteristics for indoor lighting. A reference lookup table was devised to store desired CCT values arbitrarily with respect to time mark in a day, which acts as an outdoor circadian stimulus and guides the FLC. The FLC compensates for the lack of CCT in lighting space. Simulation results show acceptable CCT output values conforming to circadian lighting parameters at a time in a day compared to the lookup table targets. Deviation from blackbody curve was within ±0.003 using CCT Duv checking. The system did not produce an overshoot (0.0%) with a steady state (zero error) reached after the fourth iteration. Also, rise time was calculated to be 1 iteration. This approach could be further enhanced to cater for additional custom needs in many built environments. Future works may consider connecting more sensors to capture real-time outdoor CCT values for practical regulation.","PeriodicalId":37388,"journal":{"name":"Journal of Daylighting","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44045967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

An Investigation-Based Optimization Framework of Thermal Comfort Analysis in Underground Enclosed Spaces Affected by Multiple Parameters for Energy Performance in Tropics 基于调查的热带地区多参数影响地下封闭空间热舒适性分析优化框架

Journal of Daylighting Pub Date : 2022-05-13 DOI: 10.15627/jd.2022.4

A. A. S. Bahdad, S. Fadzil

{"title":"An Investigation-Based Optimization Framework of Thermal Comfort Analysis in Underground Enclosed Spaces Affected by Multiple Parameters for Energy Performance in Tropics","authors":"A. A. S. Bahdad, S. Fadzil","doi":"10.15627/jd.2022.4","DOIUrl":"https://doi.org/10.15627/jd.2022.4","url":null,"abstract":"Optimization becomes more valuable when the optimal variables decision can consider sensitivity analysis. To get optimum results quickly, this study established a synthetic sensitivity analysis and multi-objective optimization approach, which is combined with an energy simulation framework characterized by parallel processing. To discover the final optimal solutions, the optimization procedures were carried out under two scenarios. To investigate the impact of each design variable on the optimization goals in order to select the variables with the greatest impact for inclusion in the final optimization, a sensitivity analysis was carried out. In the first scenario, the link between design variables and objective functions is thoroughly examined, and the ultimate impacts of optimum design variables are examined. The purpose of this study is to look at the effect of thermal envelopes on energy performance for subterranean enclosed spaces in Malaysia's tropics, to determine the best design parameter values for enclosed underground spaces and to introduce suitable variables for thermal comfort and energy performance. The optimization results confirm that while considering two objective functions of thermal and energy performance by using different optimization parameters design that as one of the objectives decreases, the other objective increases. The final optimal solutions showed that, it is possible to decrease the cooling energy for underground spaces, by up to 58.33% of total hours of the year, respectively, while maintaining occupants’ thermal comfort in the acceptable range, by up to 26.84%.","PeriodicalId":37388,"journal":{"name":"Journal of Daylighting","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43869706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A Daylight Assessment on Visual and Nonvisual Effects of Light Shelves: A Human-centered Simulation-based Approach 光架视觉和非视觉效果的日光评估：一种以人为中心的模拟方法

Journal of Daylighting Pub Date : 2022-03-14 DOI: 10.15627/jd.2022.3

Seyedeh Nazli Hosseini, Iman Sheikhansari

{"title":"A Daylight Assessment on Visual and Nonvisual Effects of Light Shelves: A Human-centered Simulation-based Approach","authors":"Seyedeh Nazli Hosseini, Iman Sheikhansari","doi":"10.15627/jd.2022.3","DOIUrl":"https://doi.org/10.15627/jd.2022.3","url":null,"abstract":"The contribution of daylight to a comfortable environment for occupants has been the subject of studies for years. Light shelves are known as daylight redirecting systems to enhance indoor daylight conditions. Although several research papers have focused on their daylight performance, there is a lack of studies on the performance of light shelves on circadian rhythm. In this context, daylight's biological effects on human beings have been under investigation. Therefore, this paper aims to evaluate the performance of light shelves in terms of visual and nonvisual effects of daylight, including circadian stimulus, visual comfort, and task performance through a multi-criteria human-centric evaluation. To this end, the authors set three following conditions if a model could provide simultaneously, the occupants would be in a comfortable space both visually and non-visually: 75% workstations with Equivalent Melanopic Lux> 250 EML concurrently with Vertical Photopic illuminance < 1500 lux, and Photopic illuminance on working plane > 300 lux. Accordingly, the light shelves with various depths, states, and orientations were simulated by ALFA to evaluate the comfort of occupants in office space over working hours. The results indicated that although applying light shelves impacted the metrics, the enhancements were minor compared to a conventional window, specifically on EML. In detail, inadequate EML levels were observed in all orientations on the simulation days. Besides, changes in the photopic illuminance at the eye and workstations levels were not substantial. Finally, the paper presents a case study that showcases simulation techniques that focus on daylighting and circadian rhythm.","PeriodicalId":37388,"journal":{"name":"Journal of Daylighting","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47190422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Development of Two-Step Biomimetic Design and Evaluation Framework for Performance-Oriented Design of Multi-Functional Adaptable Building Envelopes 面向多功能适应性建筑围护结构性能设计的两步仿生设计与评估框架的开发

Journal of Daylighting Pub Date : 2022-02-26 DOI: 10.15627/jd.2022.2

Salman Oukati Sadegh, Shawul Gulilat Haile, Ziyaolrahman Jamshidzehi

{"title":"Development of Two-Step Biomimetic Design and Evaluation Framework for Performance-Oriented Design of Multi-Functional Adaptable Building Envelopes","authors":"Salman Oukati Sadegh, Shawul Gulilat Haile, Ziyaolrahman Jamshidzehi","doi":"10.15627/jd.2022.2","DOIUrl":"https://doi.org/10.15627/jd.2022.2","url":null,"abstract":"Climate change, increase in CO2 production and energy consumption are major global issues and the building, environmental and construction sector is contributing to the increasing concern day by day. Due to increasing demands to satisfy environmental, social, and economic requirements, designing efficient and sustainable buildings has become increasingly complex. Today, the tendency towards sustainability has created new design approaches regarding adaptable kinetic building envelopes, amongst all, biomimetic design principles have gained interest. As opposed to traditional methods, the implemented biomimetic design approach in this research can assist in finding solutions for complex real-life problems regarding the adaptability of kinetic facades to achieve robustness, tractability, low solution cost and better rapport with reality. Design frameworks introduced to this day either do not incorporate bio-inspired concepts or are not able to map potential trade-offs in the performance of multi-functional biomimetic adaptable skins, effectively. Therefore, a flexible and expandable framework is necessary to go beyond project-based frameworks applied to case specific conditions. To design for performance, this research proposes a framework and aims to integrate different biomimetic approaches to assist designers and researchers in two steps to design and evaluate kinetic facades in different phases of development.","PeriodicalId":37388,"journal":{"name":"Journal of Daylighting","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44049696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Effect of Roller Shades on Chromaticity and Colour Rendering Performance of Transmitted Daylight 卷帘对透射日光色度和显色性能的影响

Journal of Daylighting Pub Date : 2022-01-29 DOI: 10.15627/jd.2022.1

A. Villalba, É. Correa, Julieta Yamín, A. Pattini

{"title":"Effect of Roller Shades on Chromaticity and Colour Rendering Performance of Transmitted Daylight","authors":"A. Villalba, É. Correa, Julieta Yamín, A. Pattini","doi":"10.15627/jd.2022.1","DOIUrl":"https://doi.org/10.15627/jd.2022.1","url":null,"abstract":"Several studies have focused on the performance of roller shades in terms of glare, outdoor vision, daylight availability and energy performance. Currently, other parameters linked to visual amenity, such as chromaticity and colour rendition, are becoming relevant. When solar radiation passes through a window, it changes its spectral composition due to the presence of the solar shading system and the glazing. Against this background, the present study focuses on the spectral transmittance of eleven woven screen fabrics and its influence on the chromaticity and colour rendition. Results show that dark-coloured woven screen shades provide higher correlated colour temperature (CCT) values (range 6470 K - 6479 K) and therefore would produce “cooler” visual environments, while light-coloured woven screen shades provide lower CCT values (range 5210 K - 5644 K) creating “warmer” visual environments. Regarding colour rendering metrics, the light transmitted through all the studied woven shades shows excellent colour rendition. Finally, it is concluded that the combined analysis of optical properties, spectral data and its impact on parameters that determine the quality of lighting in an interior space enables an understanding of woven screens performance, which results in the possibility of taking appropriate decisions when selecting woven shades.","PeriodicalId":37388,"journal":{"name":"Journal of Daylighting","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48794427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The Effects of Orientation and Width of Space Between Buildings on Ventilation of High-Rise Areas 高层建筑空间朝向和间距对通风的影响

Journal of Daylighting Pub Date : 2022-01-25 DOI: 10.20944/preprints202201.0377.v1

Seyedeh Azadeh Aghajanzadeh, S. M. Hosseini, Mojtaba Lorzangeneh, M. Taban

{"title":"The Effects of Orientation and Width of Space Between Buildings on Ventilation of High-Rise Areas","authors":"Seyedeh Azadeh Aghajanzadeh, S. M. Hosseini, Mojtaba Lorzangeneh, M. Taban","doi":"10.20944/preprints202201.0377.v1","DOIUrl":"https://doi.org/10.20944/preprints202201.0377.v1","url":null,"abstract":"In recent years, excessive heat in the urban texture has become the main problem in the humid and calm wind city of Babolsar with high density, especially in high-rise areas. Therefore, in order to create comfort in this region, it is necessary to establish and continue the wind circulation in space with an environmentally compatible and optimal configuration. The study applies combination of literature, field measurement, experimental validation of CFD simulation output, and comparative analysis. After field measurement and validation of FLOW-3D simulation software (V11.2.2), the relationship between these parameters (height, the width of passages, enclosure between buildings, and buildings' orientation) will be studied which affects the wind’s velocity and direction. The factors of the buildings' orientation and enclosure based on the passages' width have opposite reactions in the direction of the prevailing wind especially from perpendicular side. In this study, two effective factors are on wind velocity: 1- The orientation of the buildings towards the wind flow by creating permeability 2- Reducing the enclosure by increasing the width of the passage's perpendicular to the wind flow (w '= 3w, E' = 0.33E). According to the theoretical and practical study, first, the creation of permeability in the body of the block and the separation of buildings instead of aggregation has been studied, and then reducing the confinement of streets perpendicular to the wind flow has been discussed as effective solutions to improve the wind velocity and circulation between the urban environment.","PeriodicalId":37388,"journal":{"name":"Journal of Daylighting","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45007740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cover to volume 8, issue 2 第8卷第2期封面

Journal of Daylighting Pub Date : 2021-12-27 DOI: 10.15627/jd.2021.24

引用次数: 0

Table of contents to volume 8, issue 2 第8卷第2期目录

Journal of Daylighting Pub Date : 2021-12-27 DOI: 10.15627/jd.2021.26

引用次数: 0

Assessment of the Thermal Performance of Vertical Green Walls Using Overall Thermal Transfer Value Based BIM Simulation Method: Case Study of Residential Buildings in Sub-Tropics 基于整体热传递值的BIM模拟方法评估垂直绿墙的热性能——以亚热带住宅为例

Journal of Daylighting Pub Date : 2021-12-24 DOI: 10.15627/jd.2021.23

A. A. S. Bahdad, S. Fadzil, H. O. Onubi

{"title":"Assessment of the Thermal Performance of Vertical Green Walls Using Overall Thermal Transfer Value Based BIM Simulation Method: Case Study of Residential Buildings in Sub-Tropics","authors":"A. A. S. Bahdad, S. Fadzil, H. O. Onubi","doi":"10.15627/jd.2021.23","DOIUrl":"https://doi.org/10.15627/jd.2021.23","url":null,"abstract":"Construction of multifunctional building envelopes using vertical greenery walls (VGW) has emerged as a sustainable green technology to improving cooling efficiency. To attaining the desired level of building cooling performance, VGW and overall thermal transfer value (OTTV) of the walls are useful design factors. The study aims to revise the current VGW evaluation, considering the decreased heat flux due to thermal efficiency of wall construction based on OTTV values. To achieve this, OTTV based Building Information Modelling (BIM) simulation method was proposed using Autodesk-Revit and DesignBuilder simulation based on EnergyPlus. Six wall compositions with various OTTV values of south facade for residential buildings located in sub-tropical in cooling season, were evaluated. The findings demonstrate that in the presence of a green system, a good OTTV value of the exterior walls is required for optimal performance, to keep the space within set point of cooling for long time during the cooling season. The comparisons between the bare walls and the VGW have demonstrated a great variation due to the different OTTV reached up to 6.57% and 18.44% reduction in indoor air temperature. The best combination of VGW resulted a maximum of 1.2°C reduction in indoor air temperature, with number of hours (within 28°C or less) were higher by 2506h, representing 85.59% of the overall number of hours (2928h). Overall cooling energy saving is found as 103.3kwh, representing 13.63% of the total of energy saving, and decreased the heat gained by 38.82%, representing 61.51kwh reduction during cooling season compared to base wall.","PeriodicalId":37388,"journal":{"name":"Journal of Daylighting","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44381566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2