Electric lighting energy savings for a photocell controlled dimmer - a comparative simulation study using DOE.2 and Lightswitch Wizard

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ConferenceProceedings of the ESIM 2004 Conference: 10 June 2004, Vancouver
Pages183189; # of pages: 7
Subjectbuilding energy simulation, manual blind control, daylighting; Energy efficiency; Open-plan offices [cubicles]
AbstractThis paper suggests a method how to predict electric lighting energy savings for photocell controls in daylit spaces taking manual blind control into account. The method predicts lower but supposedly more ?realistic? lighting energy savings than conventional simulation approaches. On the other hand, predicted savings are larger than those predicted by ASHRAE 90.1 power adjustment factors. The method is demonstrated in a hypothetical open plan office in Calgary, Canada. A comparative simulation study is presented using DOE.2 and the RADIANCE-based daylighting analysis tool DAYSIM. Simulation results were found to differ substantially between DOE2 and DAYSIM even in the absence of venetian blinds. These discrepancies were attributed to the underlying simulation algorithms and sky models. Despite these differences, both simulation programs yielded energy savings more than twice the static 10% allowed for by ASHRAE 90.1 power adjustment factors for on/off control.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number46761
NPARC number20378720
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Record identifier7d48f951-0942-4ce3-9a65-077a9adca431
Record created2012-07-24
Record modified2016-05-09
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