Architecture / Mimarlık

Permanent URI for this collectionhttps://hdl.handle.net/11147/24

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Start date: 2020Subject: search.filters.subject.Daylight

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  • Conference Object
    The Architectural Application of Altmann Linkage as a Light Shelf
    (Yaşar Üniversitesi, 2020) Atarer, Fulya; Kazanasmaz, Zehra Tuğçe; Korkmaz, Koray; Kiper, Gökhan
    Daylight and its penetration in a room are significant concerns in architectural design. Light shelves are necessary to control daylight on fenestration. In the literature, there are many daylight controller systems such as light shelves. This paper presents the possibility of using Altmann linkage as the basis of constructing such a light shelf in rectangular form. It is basically a horizontal or inclined device, having high reflectance on the upper surface to control and redistribute daylight, placed above the eye-level in the fenestration system. The performance of a light shelf varies according to its dimensions, distance to window sill, distance to window head, its rotation angle and orientation in terms of daylight efficiency and visual comfort. It is also used to provide shading. This system can be internal or external and being static or movable. A light shelf presents its maximum efficiency in south facing façades receiving higher direct sun incident angles in medium latitudes of northern hemisphere. The aim of this study is to explain the design process of an adaptable Altmann light shelf including dimensioning the links in a rectangular form, calculating rotation angles, modelling this device in Relux to test its daylight performance. Regarding the Altmann geometries, three variations are set while changing its distance to window sill. The aim is to test illuminance and uniformity. Relux calculates illuminance and uniformity at four significant dates and three chosen hours for each one, to obtain the best design.
  • Article
    Citation - WoS: 7
    Citation - Scopus: 7
    Applicability of a Prismatic Panel To Optimize Window Size and Depth of a South-Facing Room for a Better Daylight Performance
    (Znack Publishing House, 2020) Köse, Büşra; Kazanasmaz, Zehra Tuğçe
    This study examines the performance of attached prismatic panels, which have shading capability, in a side-lit deep plan room to find out the least possible WWR value in relation to room depth satisfying the required daylight availability. The methodology is based on simulating a base model in Relux and testing it with alternative models composed of incrementally defined WWR and room depth values. In accordance with minimum IES requirements, the most satisfying sDA value was found to be 48.54 % in a room of 12 m depth with 67 % WWR. An sDA of 51.59 % and 59.26 % was achieved in a room of 9m depth with 43 % WWR and 6m depth with 30 % WWR, respectively. The least ASE values were obtained with the least WWR alternative of 30 % in all room depths. This study presents a new approach with the consideration of innovative daylight redirecting systems to propose revisions for the requirements mentioned in standards about daylight in buildings but based on conventional fenestration systems. © 2020, LLC Editorial of Journal ""Light Technik"". All rights reserved.
  • Conference Object
    Citation - WoS: 1
    Citation - Scopus: 1
    Changes in Attention and Mental Rotation Performance in Relation To Luminance Variations in Educational Spaces
    (Institute of Electrical and Electronics Engineers, 2020) Öner, Merve; Kazanasmaz, Zehra Tuğçe
    This paper attempts to investigate attention and mental rotation performance of students under two groups of luminance ratios in the visual field during VDT work. Each experiment was conducted under daylit conditions and consisted of two trials (with and without shading device) which were carried out in one experimental session. Twenty university students were recruited as participants to perform cognitive test as well as to administer subjective evaluations in a mock-up VDT station. Luminance ratios were grouped based on the ratios between bright light and direct surroundings. Results showed that the students gave faster responses for finding the correct target when the luminance distribution was not uniform whereas the number of correct answers given was higher when the luminance distribution was uniform. Subjective sensation of visual discomfort and lighting appraisal were in the same trend, indicating uniform luminance distribution was more appreciated by the participants. Based on these findings, the study provides additional insights in the effect of luminance patterns on individuals' performance, health and wellbeing in educational buildings. © 2020 IEEE.