Assessment of window performance in classrooms by long term spatial comfort metrics

Zomorodian, Zahra Sadat; Tahsildoost, Mohammad

doi:10.1016/j.enbuild.2016.10.018

Cited by 62 publications

(24 citation statements)

References 32 publications

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“…These results consolidate the existing knowledge about the use of CBDM simulations for informing the design process of school buildings [33,34], and further the understanding of dynamic daylight metrics by using a wide range of illuminance-and luminance-based metrics in a comprehensive way. The comparison with the results of traditional and commonly adopted static metrics shows that the messages coming from these static metrics can be deceiving.…”

Section: Discussionsupporting

confidence: 75%

Application of Climate Based Daylight Modelling to the Refurbishment of a School Building in Sicily

et al. 2018

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This paper aims at promoting the use of Climate Based Daylight Modelling (CBDM) and related state-of-the-art metrics by discussing a range of design options to improve daylight fruition in rooms with different orientation, shape, function, and furniture of an elementary school that is located in the Mediterranean climate of Agira (Italy). The local climatic conditions, with clear skies for most of the year, require the integration of different shading and re-directing systems with the existing envelope and rooms' layout. Results show that the dynamic modelling is a powerful and 'creative' tool in the designer's hands, which helps to inform about the choice of the most appropriate technological solutions and on their architectural integration. Comparison with mostly used static daylight metrics, such as the average Daylight Factor (aDF) and the Uniformity Ratio (UR), reveals a contrast with what would be suggested if considering these metrics alone, as prescribed by the Italian legislation. These outcomes rebate the need of performing more accurate and dynamic daylight simulations using recorded (i.e., varying) rather than fixed sky conditions to correctly inform the design process.(UDI) metrics [5] for the evaluation of design proposals that were submitted to the Priority Schools Building Programme [6].However, despite the indisputable advances achieved by considering real (i.e., recorded) time series of irradiance/illuminance values from largely available weather datasets, there are some concerns to bear in mind when adopting CBDM.First, the choice of the weather dataset should be based on the purposes of the modelling and the underlying characteristics of the dataset itself (e.g., location, measurement period, statistical techniques being employed for resembling typical or extreme weather conditions). In fact, as demonstrated by Bellia et al. [7], using the IWEC (International Weather for Energy Calculation), Meteonorm, Satel-Light, or TRY weather sources could lead to different results in terms of Annual Light Exposures (i.e., the amount of light falling onto a certain point throughout the year, measured in luxh), and of various dynamic metrics, such as the Daylight Availability (DA, [8]) and the UDI. This happens because usually the TRY datasets show lower values for the global horizontal irradiance than in other sources; however, these outcomes were only proven for a north-oriented room, while different exposures could lead to different results because of sunlight contribution [7].Secondly, there is a lack of consensus around the choice of the metrics and of their thresholds to judge if a space is 'well daylit' or not. The variety of CBDM approaches employed for educational buildings, ranging from traditional illuminance and luminance distribution under fixed sky conditions to novel circadian metrics, has been documented in a recent review paper by Costanzo et al. [9].As an example, in regards to the above-mentioned adoption of the UDI metrics for school buildings design in the UK, Littlefair noted that the...

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Section: Discussionsupporting

confidence: 75%

Application of Climate Based Daylight Modelling to the Refurbishment of a School Building in Sicily

et al. 2018

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“…Zomorodian and Tahsildoost [20] attempted a thermo-visual comfort dynamic analysis of both north-and south-oriented classrooms in Tehran (Iran) by applying some thermal and daylight metrics able to consider both temporal and spatial variations of comfort levels. Different glazing solutions, ranging from single clear to triple low-emissive panes, as well as different external shading devices such as an opaque fixed overhang of 0.6 m depth and a horizontal louver system, are modeled in a way similar to what is described in [51].…”

Section: Classroom Layout and Glazing Typesmentioning

confidence: 99%

“…Overhangs [34,47,49,50,57] Well suited for south-oriented rooms, often necessary to avoid overheating in the summer at low latitude climates Louvers [20,31,34,38,39,46,51] Well suited for east and west orientations, fixed devices often require additional internal blinds and work better under clear sky conditions Solar screens [55] Downward tilt angles and 1:1 louvers depth ratio are optimal solutions for achieving good spatial daylight availability without the risk of glare Movable blinds [42] External semi-transparent blinds, together with light shelves, improve illuminance uniformity…”

Section: External Shading Devicesmentioning

confidence: 99%

“…SVD is the percentage of occupied space where DGP keeps above 0.45 for at least 20% of the time of occupancy; the authors proposed to rate a classroom as comfortable when SVD < 10%, computed by excluding all points less than 0.5 m away from the windows [20].…”

Section: Metrics For Assessing Daylight Exploitationmentioning

confidence: 99%

“…Finally, Zomorodian and Tahsildoost studied visual and thermal comfort in a typical classroom in Iran [20], by changing its orientation, the Window to Wall Ratio (WWR) and the optical properties of the windows, condensed in the Light-to-Solar-Gain Ratio (LSG). LSG > 1 indicates glazing with visible transmittance higher than solar transmittance (e.g., static reflective glazing).…”

Section: Examplary Use Of Daylight Metrics For Classroom Designmentioning

confidence: 99%

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A Review of Daylighting Strategies in Schools: State of the Art and Expected Future Trends

2017

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Abstract:The study of daylight conditions within educational buildings has been a topic of interest since the nineteenth century in western countries, and European ones in particular. Although it has been argued that providing a view outside-or even using daylight instead of more stable and manageable artificial light-could reduce students' performance without providing a pleasant and healthy environment, nowadays it seems that a large consensus upon the need to design well daylit spaces is being reached. This paper reviews how the research community has tackled the task of understanding and solving the complex relationships amongst local climate, users' needs and design constraints in school buildings by showing the different approaches used and technological solutions suggested. The reported case studies, based either on experimental measurements or on simulations, highlight the need of a comprehensive approach to the topic to fully understand the non-trivial requirements of a daylit educational environment.

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Exploring the Efficacy of Polysaccharides as Green Corrosion Inhibitors: A Comprehensive Review

AL Salihi,

Mahdi,

Al‐Amiery

et al. 2024

Starch Stärke

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Corrosion threatens materials in diverse industries, necessitating sustainable corrosion inhibitors. Polysaccharides, abundant natural polymers, emerge as eco‐friendly corrosion inhibitors. This review explores polysaccharides' efficacy, mechanisms, and applications. It introduces the significance of corrosion and the vital role of inhibitors, positioning polysaccharides as promising green solutions. The exploration covers polysaccharide diversity, sources, and eco‐friendly attributes. Corrosion mechanisms are detailed, setting the stage for understanding inhibition strategies. Polysaccharides, with unique adsorption and film‐forming properties, are effective inhibitors, elucidated through electrochemical studies. Influential factors like pH, temperature, and concentration effects, along with practical applicability considerations, are examined. Real‐world implementations across industries underscore polysaccharides' versatility, often surpassing traditional inhibitors. Despite challenges, this review outlines their promising role, addressing concerns and proposing future directions. Polysaccharides emerge as eco‐friendly alternatives, illuminating inhibitive properties, mechanisms, and practical applications, guiding continued research for sustainable corrosion prevention.

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Assessment of window performance in classrooms by long term spatial comfort metrics

Cited by 62 publications

References 32 publications

Application of Climate Based Daylight Modelling to the Refurbishment of a School Building in Sicily

Application of Climate Based Daylight Modelling to the Refurbishment of a School Building in Sicily

A Review of Daylighting Strategies in Schools: State of the Art and Expected Future Trends

Exploring the Efficacy of Polysaccharides as Green Corrosion Inhibitors: A Comprehensive Review

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