<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Light shelf was developed to create uniform indoor illuminance. However, in hot climates the unshaded clerestory above the shelf transmits high solar heat gain. In dense urban context, these advantages and disadvantages might vary regarding the context and position of the fenestration. This study employed an integrated energy simulation software to investigate the effectiveness of light shelf application in a tropical urban context in terms of building energy consumption. <italic>Radiance</italic> and <italic>EnergyPlus</italic> based simulations performed the effects of urban canyon aspect ratio and external surface albedo on the daylighting performances, space cooling load, as well as the lighting energy consumption of the building equipped with lightshelves in 2 humid tropical cities. Comparison of the energy performances of 3 fenestration systems, i.e. fenestration without any shading device, with overhangs, and with light shelves, yielded some recommendations concerning the best application of light shelf on the certain floor levels and aspect ratio of the urban context.</p></abstract>

Light shelf was developed to create uniform indoor illuminance. However, in hot climates the unshaded clerestory above the shelf transmits high solar heat gain. In dense urban context, these advantages and disadvantages might vary regarding the context and position of the fenestration. This study employed an integrated energy simulation software to investigate the effectiveness of light shelf application in a tropical urban context in terms of building energy consumption. Radiance and EnergyPlus based simulations performed the effects of urban canyon aspect ratio and external surface albedo on the daylighting performances, space cooling load, as well as the lighting energy consumption of the building equipped with lightshelves in 2 humid tropical cities. Comparison of the energy performances of 3 fenestration systems, i.e. fenestration without any shading device, with overhangs, and with light shelves, yielded some recommendations concerning the best application of light shelf on the certain floor levels and aspect ratio of the urban context.

The Effectiveness of Light Shelf in Tropical Urban Context

Architecture Department, Universitas Atma Jaya Yogyakarta, Jl. Babarsari No. 44, Kecamatan Depok, Daerah Istimewa Yogyakarta 55281,

Environmental and Climate Technologies

This work is licensed under the Creative Commons Attribution 4.0 Public License.

{"article-title":"The Effectiveness of Light Shelf in Tropical Urban Context"}

Light shelf was developed to create uniform indoor illuminance. However, in hot climates the unshaded clerestory above the shelf transmits high solar heat...

The Effectiveness of Light Shelf in Tropical Urban Context

Published Online: Jan 27, 2017

Page range: 42 - 53

DOI: https://doi.org/10.1515/rtuect-2016-0012

Keywords
Cooling load, daylighting performance, electrical lighting load, light shelf, urban geometry, urban surface albedo

© 2016 Riga Technical University

This work is licensed under the Creative Commons Attribution 4.0 Public License.

The Effectiveness of Light Shelf in Tropical Urban Context

Published Online: Jan 27, 2017

Page range: 42 - 53

DOI: https://doi.org/10.1515/rtuect-2016-0012

KeywordsCooling load, daylighting performance, electrical lighting load, light shelf, urban geometry, urban surface albedo

© 2016 Riga Technical University

This work is licensed under the Creative Commons Attribution 4.0 Public License.

Keywords
Cooling load, daylighting performance, electrical lighting load, light shelf, urban geometry, urban surface albedo