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After-hours Power Status of Office Equipment and Inventory of Miscellaneous Plug-Load Equipment

This report presents evidence of the growing use of laptop computers. Because of their inherent portability, accounting for laptops is difficult, especially during an after-hours survey, but our conservative estimate is that laptops comprise at least 10% of the non-server computers in our sample. We also estimate that laptops outnumbered desktop computers at two sites: one medium and one large office. To the extent that relatively energy-efficient laptops are replacing desktop computers, significant electrical energy is saved. However, more work is. | LBNL-53729 After-hours Power Status of Office Equipment and Inventory of Miscellaneous Plug-Load Equipment Judy A. Roberson Carrie A. Webber Marla C. McWhinney Richard E. Brown Margaret J. Pinckard and John F. Busch Energy Analysis Department Environmental Energy Technologies Division Ernest Orlando Lawrence Berkeley National Laboratory University of California Berkeley CA 94720 USA January 2004 To download this paper and related data go to http enduse.lbl.gov Projects OffEqpt.html The work described in this paper was supported by the Office of Atmospheric Programs Climate Protection Partnerships Division of the U.S. Environmental Protection Agency and prepared for the U.S. Department of Energy under Contract No. DE-AC03-76SF00098. Table of Contents Table of Contents.i List of Tables List of Figures.ii Abbreviations Acronyms and Glossary of Terms.iii Acknowledgements. iv Abstract.1 Introduction.2 Methodology.3 Building Sample.3 Survey Protocol.5 Office Equipment Data Collection.5 Miscellaneous Equipment Data Collection.6 Limitations of This Methodology.7 Results and Discussion.7 Equipment Density.7 Office Equipment.8 Computers.9 Laptop Computers.10 Monitors.11 Printers.14 Multi-Function Devices.15 Copiers.15 Fax Machines.15 Scanners.16 Office Equipment Comparison of 2000 and 2003 Turn-off and PM Rates.16 Miscellaneous Equipment.17 External Power Supplies.18 Conclusions.19 Future Work.21 References.22 Appendix A Building Descriptions.23 Appendix B Flowchart for Auditing Desktop Computer Power State.25 Appendix C Miscellaneous Equipment Taxonomy.26 Appendix D Miscellaneous Equipment Numbers by Category and Site.27 LBNL-53729