Abstract
This paper presents an assessment and comparison of the effects of static and kinetic external shading elements on the dynamic measurement of daylighting. For this purpose, we used a method and parametric tool developed previously for the design and analysis of external shading elements in buildings. The proposed approach was used to compare static and dynamic movement scenarios for achieving optimal internal adjusted useful daylight illuminances (AUDI). The current paper presents the results of a methodical analysis, which compared various types of louvers in static and dynamic operation scenarios for a typical office in a Mediterranean climate. The results show that dynamically adjusted louvers perform notably better than fixed or seasonally adjusted modes of operation. The results show that dynamic operation scenarios can increase the AUDI by up to 51%. The results also show that in some conditions the existing rules of thumb fail to predict the correct design approach to louver geometry and that the use of rules of thumb in architectural daylight design needs to be revaluated.
Highlights
Climate adaptive building envelopes have been receiving increasing interest in recent years [1].The growing interest can be explained, among other reasons, by the technological advances in control and motion mechanisms and by the growing awareness of building performance and its influence on energy consumption and climate change [2]
The division to the above parts respects two potential starting points of a design processes of a louver system: one that focuses on the geometry of the louvers and the other that concentrates on performance and operation scenarios
The level of the improvement is, slightly lower in the fixed and seasonally adjusted scenarios and higher in the dynamically adjusted louvers scenario: Fixed louvers: The results show an a small decrease in the adjusted useful daylight illuminances (AUDI) levels compared to no louvers scenario in the south, southeast, east and northeast orientations and an increase of about
Summary
Climate adaptive building envelopes have been receiving increasing interest in recent years [1].The growing interest can be explained, among other reasons, by the technological advances in control and motion mechanisms and by the growing awareness of building performance and its influence on energy consumption and climate change [2]. The use of dynamic external shades is one of the earliest examples of climate adaptive building envelopes. Dynamic external shades have the potential to optimize the internal illuminance and solar radiation over the building’s façade in relation to the sun’s position. They can react to various disturbances in the sun’s radiation, such as clouds, trees, adjacent buildings and other urban elements, allowing dynamic adaptation of internal environmental conditions. People do not operate shades as much as is required to achieve optimal results. Their operation is done weekly or even monthly at most, with the main aim of improving the visual environment rather than thermal [4,5]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
