Lighting Energy Saving with Light Pipe in Farm Animal Production

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Lighting Energy Saving with Light Pipe in Farm Animal Production

von Wachenfelt, Hans (author): Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Biosystem och teknologi,Department of Biosystems and Technology

Vakouli, Vaia (author)

Pacheco Diéguez, Alejandro (author)

Gentile, Niko (author): Lund University,Lunds universitet,Institutionen för arkitektur och byggd miljö,Institutioner vid LTH,Lunds Tekniska Högskola,Avdelningen för Energi och byggnadsdesign,Institutionen för bygg- och miljöteknologi,Department of Architecture and Built Environment,Departments at LTH,Faculty of Engineering, LTH,Division of Energy and Building Design,Department of Building and Environmental Technology,Faculty of Engineering, LTH

Dubois, Marie-Claude (author): Lund University,Lunds universitet,Institutionen för arkitektur och byggd miljö,Institutioner vid LTH,Lunds Tekniska Högskola,Avdelningen för Energi och byggnadsdesign,Institutionen för bygg- och miljöteknologi,Department of Architecture and Built Environment,Departments at LTH,Faculty of Engineering, LTH,Division of Energy and Building Design,Department of Building and Environmental Technology,Faculty of Engineering, LTH

Jeppsson, Knut-Håkan (author): Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Biosystem och teknologi,Department of Biosystems and Technology

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2015-12
2015
English.
In: Journal of Daylighting. - : SolarLits. - 2383-8701. ; 2:2, s. 21-31

Related links:: http://dx.doi.org/10... (free); show more...; http://www.solarlits...; https://lup.lub.lu.s...; https://doi.org/10.1...; https://res.slu.se/i...; show less...

Journal article (peer-reviewed)

Abstract Subject headings

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 outdoor sensor. If the horizontal illuminance at pig height decreases below 40 lux between 08.00 and 16.00 hours, an automatic control system activates the lights, and electricity use is measured.. The daylight factor (DF) and DA are determined for each house, based on annual climate data. The mean annual DA of 48% and 55% is achieved for house 1 and house 2, respectively. Light pipes in house 2 have delivered significantly more DA than those in house 1. The most common illuminance range between 0 and 160 lux is recorded in both houses, corresponding to approximately 82% and 83% of daylight time for house 1 and house 2, respectively. Further, the daylighting system for house 2 has produced a uniform DF distribution between 0.05 and 0.59. The results demonstrate that considerable electric energy savings can be achieved in the animal production sector using light pipes. Saving 50% of electric lighting would correspond to 36 GWh or 2520 t CO2 per year for Sweden, but currently the energy savings are not making the investment profitable.

Subject headings

LANTBRUKSVETENSKAPER -- Husdjursvetenskap -- Husdjursvetenskap (hsv//swe)
AGRICULTURAL SCIENCES -- Animal and Dairy Sience -- Animal and Dairy Science. (hsv//eng)
TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Arkitekturteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Architectural Engineering (hsv//eng)
TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Husbyggnad (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Building Technologies (hsv//eng)

Keyword

Electric lighting
Energy saving
Daylighting
Light pipe

Publication and Content Type

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AGRICULTURAL SCIENCES: AGRICULTURAL SCI ...; and Animal and Dairy ...; and Animal and Dairy ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Civil Engineerin ...; and Architectural En ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Civil Engineerin ...; and Building Technol ...

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By the university: Lund University; Swedish University of Agricultural Sciences

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