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SUMMARY:Impact of lighting control systems based on “Non-Image-Forming
 ” effects of light on electric lighting energy demand
and user’s com
 fort and performance
DTSTART:20160502T121500
DTEND:20160502T131500
DTSTAMP:20261001T181326Z
UID:b18a688aa7a0e7a273f1690c7967c0fc7210f28df21fe4f01d82c80d
CATEGORIES:Conferences - Seminars
DESCRIPTION:Ms. Marta Benedetti\, Graduate energy engineer\, University of
  Bolzano\nLighting has an impact not only on our visual comfort and perfor
 mance\, but also on our behaviour and physiology. It is shown that exposur
 e to light can directly boost alertness\, cognitive performance\, and impr
 ove our mood. These non-visual effects of light are called ”Non-Image Fo
 rming” (NIF) effects. Considering NIF effects in lighting of working env
 ironments such as offices can be very important to improve well-being\, pe
 rformance and productivity of the users. So far\, these effects have not b
 een considered in building automation mainly due to their unknown and comp
 licated nature.\nThe objective of this Master thesis is to introduce and e
 valuate NIF effect of light in control algorithms used for automatic regul
 ation of the shading and electric lighting in an office environment. A use
 r-centric approach can be adopted thanks to one of the main innovations of
  this work: a novel HDR vision sensor used for ”on-the-fly” assessment
  of lighting conditions and glare indices. The sensor is integrated in the
  controller of an office room in the LESO-PB experimental building (Labora
 tory of Solar Energy and Building Physics) in the Swiss Federal Institute 
 of Technology in Lausanne. A dynamic lighting protocol was chosen based on
  literature review in order to improve NIF effects of light on office work
 ers (alertness and performance) and with an eye towards energy savings. An
  advanced control system for shading and lighting was designed to follow t
 he lighting protocol and ensure the visual comfort of the user at the same
  time. A 12-days field study with 6 young human subjects in the LESO-PB bu
 ilding was carried out in order to test the performance of the controller 
 from an energy saving and occupant’s visual/cognitive perspective. With 
 respect to a reference controller inspired by industry\, the advanced cont
 rol strategy led to considerable energy savings\, whereas no remarkable di
 fferences were shown for users’ comfort and performance\, even though sl
 ight improvements were appreciated in some aspects.
LOCATION:CE 1 104 http://plan.epfl.ch/?lang=fr&room=CE+1+104
STATUS:CONFIRMED
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