Persistence of energy savings of lighting retrofit technologies at the Forrestal Building

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In 1989, the Forrestal Building, headquarters for the U.S. Department of Energy, was chosen for a major lighting retrofit project. The project replaced the aging fighting system newer, energy-efficient fixtures. Pacific Northwest Laboratory conducted a three-part monitoring study at the Forrestal Building to (1) characterize building energy use, (2) empirically measure savings realized by the lighting retrofit, and (3) determine the persistence of energy savings. This report summarizes the findings from the third and final monitoring phase. Two data loggers were left installed at the Forrestal Building and data were collected for a 12-month period after the lighting retrofit was ... continued below

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29 p.

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Chvala, W.D. Jr.; Wahlstrom, R.R. & Halverson, M.A. June 1, 1995.

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  • Pacific Northwest Laboratory
    Publisher Info: Pacific Northwest Lab., Richland, WA (United States)
    Place of Publication: Richland, Washington

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Description

In 1989, the Forrestal Building, headquarters for the U.S. Department of Energy, was chosen for a major lighting retrofit project. The project replaced the aging fighting system newer, energy-efficient fixtures. Pacific Northwest Laboratory conducted a three-part monitoring study at the Forrestal Building to (1) characterize building energy use, (2) empirically measure savings realized by the lighting retrofit, and (3) determine the persistence of energy savings. This report summarizes the findings from the third and final monitoring phase. Two data loggers were left installed at the Forrestal Building and data were collected for a 12-month period after the lighting retrofit was completed. An analysis-of-variance test indicated that the mean monthly lighting demand is increasing. A regression analysis performed on the data indicated that the mean monthly lighting demand for workdays is increasing at a rate of 0.3652{+-}0.1101 kW/mo. The nonworkday demand is increasing at a rate of 0.3408{+-}0.1027 kW/mo. During the same period, workday mean monthly plug load demand increased 0.0912{+-}0.0275 kW/mo., while nonworkday plug loads decreased slightly. The gradual increase, though significant, is reduced when compared to the 56% savings recorded after the lighting retrofit. The increase is attributed to a combination of occupants returning to original (pre-retrofit poor) behavior and a small set of occupancy sensors being defeated by building occupants. Degradation of lighting fixtures from {open_quotes}burn-in time{close_quotes} was ruled out because all burn-in time is expected in the first few months and the increasing trend persists over the 11 months of this study. Because the lighting demand was still increasing at the end of the study, without further data collection, it was not possible to determine when the increase would level out. Therefore, the true energy savings from the lighting retrofit remain unknown.

Physical Description

29 p.

Notes

OSTI as DE95016116

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  • Other Information: PBD: Jun 1995

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  • Other: DE95016116
  • Report No.: PNL--10543
  • Grant Number: AC06-76RL01830
  • DOI: 10.2172/95188 | External Link
  • Office of Scientific & Technical Information Report Number: 95188
  • Archival Resource Key: ark:/67531/metadc791526

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • June 1, 1995

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

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  • April 7, 2016, 4:45 p.m.

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Chvala, W.D. Jr.; Wahlstrom, R.R. & Halverson, M.A. Persistence of energy savings of lighting retrofit technologies at the Forrestal Building, report, June 1, 1995; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc791526/: accessed December 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.