Energy saving potential of office equipment power management

• Published in: Energy and buildings 2004-09, Vol.36 (9), p.915-923
• Main Authors: Kawamoto, Kaoru, Shimoda, Yoshiyuki, Mizuno, Minoru
• Format: Article
• Language: English
• Subjects: Applied sciences; Building technical equipments; Buildings; Buildings. Public works; Commercial building; Electricity consumption; Energy management and energy conservation in building; Energy saving potential; Environmental engineering; Exact sciences and technology; Office equipment power management; Types of buildings
• ISSN: 0378-7788
• DOI: 10.1016/j.enbuild.2004.02.004

While many studies have estimated the energy saving potential of office equipment power management, there is no recent study about the energy saving potential of shortening the power management delay time. In this paper, we estimated the energy saving potential of the complete saturation of power management, and also the additional energy saving potential of shortening the power management delay time for PCs, displays, copiers, and laser printers in Japanese offices. To obtain key data, we conducted the surveys and field measurements of usage in business hours and the turn-off rate at night. We found that office equipment power management can save as much as 3.5 TWh per year, which is nearly equal to 2% of commercial electricity consumption in Japan. We also found that the energy use of office equipment in Japanese offices with no use of power management is even lower than that in US offices with maximum use of power management. This is primarily because the portable computer is much more popular in Japan, and also because the manual-off rate at night is more than twice that in the US.