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Latest Articles

Solar Energy Gain and Space-Heating Energy Supply Analyses for Solid-Wall Dwelling Retrofitted with the Experimentally Achievable U-value of Novel Triple Vacuum Glazing

Saim Memon, Philip C Eames

Research Article A considerable effort is devoted to devising retrofit solutions for reducing space-heating energy in the domestic sector. Existing UK solid-wall dwellings, which have both heritage values and historic fabric, are being improved but yet they tend to have meagre thermal performance, partly, due to the heat-loss through glazings. This paper takes comparative analyses approach to envisage space-heating supply required in order to maintain thermal comfort temperatures and attainable solar energy gain ...

Published on 07 February 2017
http://dx.doi.org//10.15627/jd.2017.2

Exploring the Impact of Natural Light Exposure on Sleep of Healthy Older Adults: A Field Study

Mariëlle P. J. Aarts, Janny C. Stapel, Toine A. M. C. Schoutens, Joost van Hoof

Research Article Studies among people with dementia demonstrated that the sleep quality and rhythm improves significantly when people are exposed to ambient bright light. Since almost half of the healthy older people also indicate to suffer from chronic sleep disorders, the question arises whether ambient bright light can be beneficial to healthy older people. Particularly the effect on sleep/wake rhythm in relation to the exposure to natural light is the focus. It was hypothesised that the sleep quality would b ...

Published on 04 May 2018
http://dx.doi.org/10.15627/jd.2018.2

Impact of Furniture Layout on Indoor Daylighting Performance in Existing Residential Buildings in Malaysia

Research Article Currently, home-based computing workspaces have developed substantially all over the world, especially in Malaysia. This growing trend attracts computer workers to run a business from their residential units. Hence, visual comfort needs to be considered in addition to thermal comfort for home workers in their residential working rooms. While such rooms are always occupied with furniture, the layout of the furniture may influence the indoor daylighting distribution. Several various furniture layo ...

Published on 08 January 2018
http://dx.doi.org/10.15627/jd.2018.1

Solar shading in low energy office buildings - design strategy and user perception

Steinar Grynning, Nicola Lolli, Solvår Wågø, Birgit Risholt

Research Article Moving towards passive house-level envelopes, zero-energy buildings, or zero-emission buildings, where the carbon footprints of the buildings are minimal, the performance of the transparent parts of the envelope is vital for ensuring a low energy demand and a desirable indoor environment. Previous studies explored and confirmed that the energy performance of buildings is highly dependent on the design, functionality, and area of the transparent façades in office buildings. Several factors mus ...

Published on 02 February 2017
http://dx.doi.org/10.15627/jd.2017.1

Journal of Daylighting

Journal of Daylighting is an international journal devoted to investigations of daylighting in buildings. It is the leading journal that publishes original research on all aspects of daylighting. The aim is to present cutting edge research aimed at reducing the electric lighting energy use in buildings and improving indoor environment.

ISSN: 2383-8701
Frequency: Bi-annual issues (articles published continuously throughout the year)
Year started: 2014

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Research Articles

Daylighting as the Driving Force of the Design Process: from the Results of a Survey to the Implementation into an Advanced Daylighting Project

Valerio R.M. Lo Verso, Elena Fregonara, Federica Caffaro, Caterina Morisanov, Gian Maria Peiretti

Research Article This paper presents a study for the transformation of an industrial area in Turin, Italy. The area hosts two buildings (one of which appointed as listed) to be transformed into dwellings. A synergic approach was adopted which combined expertise from architecture, social-economics, psychology and building physics sciences. Building physics sciences lead the research team. A user-centered design was pursued, using a bottom-up approach. A specifically developed questionnaire was submitted on-line t ...

Published on 22 December 2014
http://dx.doi.org/10.15627/jd.2014.5

Lighting Energy Saving with Light Pipe in Farm Animal Production

Hans von Wachenfelt, Vaia Vakouli, Alejandro Pacheco Diéguez’, Niko Gentile, Marie-Claude Dubois, Knut-Håkan Jeppsson

Research Article The Swedish animal production sector has potential for saving electric lighting of €4-9 million per year using efficient daylight utilisation. To demonstrate this, two light pipe systems, Velux® (house 1) and Solatube® (house 2), are installed in two identical pig houses to determine if the required light intensity, daylight autonomy (DA), and reduced electricity use for illumination can be achieved. In each house, three light sensors continuously measure the indoor daylight relative to an outdo ...

Published on 08 September 2015
http://dx.doi.org/10.15627/jd.2015.5

A Methodology to Link the Internal Heat Gains from Lighting to the Global Consumption for the Energy Certification of Buildings in Italy

Valerio R.M. Lo Verso, Guglielmina Mutani, Laura Blaso

Research Article This paper critically discusses the procedure prescribed by the Italian Technical Standards to account for the internal gains in the calculation of the energy performance indices for a building. This procedure is based on a tabular value set depending on the building usage only (e.g., 6 W/m2 for office buildings), independently of the site and of the controls for blinds and lighting systems. Instead, the paper proposes a new procedure, which relies on the lighting energy numerical indicator (LEN ...

Published on 22 December 2014
http://dx.doi.org/10.15627/jd.2014.6