Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Monitored lighting energy savings from dimmable lighting controls in The New York Times Headquarters Building
Graphical abstract
Highlights Field study of dimming lighting controls in high-rise, open-plan office spaces. 28% energy savings relative to installed lighting power density (ASHRAE 90.1-2001). 20% energy savings relative to ASHRAE 90.1-2007. Dimming controls can be cost-effective if installed cost kept low. Calibrating control system data with measurements can improve reliability of results.
Abstract Digital addressable, dimmable lighting controls were introduced to the US market in the early 2000s with the promise of energy savings while allowing greater flexibility than their analog counterpart. The New York Times Company installed this emerging technology, after thorough pre-procurement testing, in their new building in New York, NY. Four years after full occupancy (2007), the owner agreed to participate in post-occupancy monitoring of the lighting system to verify actual performance. Annual lighting energy savings from daylighting, setpoint tuning and occupancy controls were determined for the daylit, open-plan office areas on three typical floors (6th, 11th, and 20th) of the 51-story tower. Energy savings were calculated from data recorded by the lighting control system, after calibration through independent energy consumption measurements. Savings from dimming controls (daylighting and setpoint tuning) were 12.6kWh/m2 yr for the daylit spaces on the three floors overall, or 20%, relative to ASHRAE 90.1-2007. Against the prescriptive code in effect at the time of the building's construction (ASHRAE 90.1-2001), savings were 21.0kWh/m2 yr or 28%. Annual lighting energy use with all lighting control strategies was 33.9kWh/m2 yr in the daylit, open plan zones on average for the three floors. A simple payback analysis was conducted.
Monitored lighting energy savings from dimmable lighting controls in The New York Times Headquarters Building
Graphical abstract
Highlights Field study of dimming lighting controls in high-rise, open-plan office spaces. 28% energy savings relative to installed lighting power density (ASHRAE 90.1-2001). 20% energy savings relative to ASHRAE 90.1-2007. Dimming controls can be cost-effective if installed cost kept low. Calibrating control system data with measurements can improve reliability of results.
Abstract Digital addressable, dimmable lighting controls were introduced to the US market in the early 2000s with the promise of energy savings while allowing greater flexibility than their analog counterpart. The New York Times Company installed this emerging technology, after thorough pre-procurement testing, in their new building in New York, NY. Four years after full occupancy (2007), the owner agreed to participate in post-occupancy monitoring of the lighting system to verify actual performance. Annual lighting energy savings from daylighting, setpoint tuning and occupancy controls were determined for the daylit, open-plan office areas on three typical floors (6th, 11th, and 20th) of the 51-story tower. Energy savings were calculated from data recorded by the lighting control system, after calibration through independent energy consumption measurements. Savings from dimming controls (daylighting and setpoint tuning) were 12.6kWh/m2 yr for the daylit spaces on the three floors overall, or 20%, relative to ASHRAE 90.1-2007. Against the prescriptive code in effect at the time of the building's construction (ASHRAE 90.1-2001), savings were 21.0kWh/m2 yr or 28%. Annual lighting energy use with all lighting control strategies was 33.9kWh/m2 yr in the daylit, open plan zones on average for the three floors. A simple payback analysis was conducted.
Monitored lighting energy savings from dimmable lighting controls in The New York Times Headquarters Building
Fernandes, Luís L. (Autor:in) / Lee, Eleanor S. (Autor:in) / DiBartolomeo, Dennis L. (Autor:in) / McNeil, Andrew (Autor:in)
Energy and Buildings ; 68 ; 498-514
05.10.2013
17 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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