• Mar 26, 2024 News!Vol.16, No. 1 has been published with online version.   [Click]
  • Jan 02, 2024 News!All papers in IJET will be publihsed article by article staring from 2024.
  • Nov 03, 2023 News!News | Vol.15, No. 4 has been published with online version.   [Click]
General Information
    • ISSN: 1793-8236 (Online)
    • Abbreviated Title Int. J. Eng. Technol.
    • Frequency:  Quarterly 
    • DOI: 10.7763/IJET
    • APC: 500 USD
    • Managing Editor: Ms. Jennifer Zeng
    • Abstracting/ Indexing: Inspec (IET), CNKI Google Scholar, EBSCO, ProQuest, Crossref, Ulrich Periodicals Directory, Chemical Abstracts Services (CAS), etc.
    • E-mail: ijet_Editor@126.com
Editor-in-chief
IJET 2017 Vol.9(3): 198-204 ISSN: 1793-8236
DOI: 10.7763/IJET.2017.V9.970

Analysis of Circadian Stimulus and Visual Comfort Provided by Window Design in Architecture

I. Acosta, J. F. Molina, and M. A. Campano

Abstract—Light is the major synchronizer of circadian rhythms to the 24-hour solar day. Compared to the visual system, the circadian system requires more light to be activated and is more sensitive to short-wavelength light. Daylighting is an ideal light source for circadian entrainment. Architectural and design features, such as window size and room reflectances impact the amount of circadian stimulus that the patient will receive. DaySim 3.2 simulations were used to determine the percentage of days that occupants would receive a minimum circadian stimulation of 0.50 for at least an hour during the morning. According to a phototransduction model of the human circadian system, a circadian stimulation of 0.50 is equivalent to suppressing the hormone melatonin by about 50%. This circadian stimulus criterion is examined for different window to wall ratios, for two average room reflectances, and for four latitudes. The present paper provides an example of a tool that could be used to assist designers in fenestration and interior design.

Index Terms—Circadian stimulus, daylight autonomy, visual comfort, window.

The authors are with Instituto Universitario de Arquitectura y Ciencias de la Construcción, Universidad de Sevilla, Spain (e-mail: iacosta@us.es).

[PDF]

Cite: I. Acosta, J. F. Molina, and M. A. Campano, "Analysis of Circadian Stimulus and Visual Comfort Provided by Window Design in Architecture," International Journal of Engineering and Technology vol. 9, no. 3, pp. 198-204, 2017.

Copyright © 2008-2024. International Journal of Engineering and Technology. All rights reserved. 
E-mail: ijet_Editor@126.com