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Understanding ENERGY STAR: A Guide to Energy-Efficient Office Products

This overview of ENERGY STAR, presented by Lisa Hopkinson from the University of Bradford, highlights the voluntary labeling scheme designed for energy-efficient office products. It defines minimum energy criteria, updates every 2-3 years, and provides a database of the most efficient models. The analysis includes energy consumption breakdowns for various computing equipment categories, including desktops and notebooks, and emphasizes the importance of considering whole life costs when purchasing energy-efficient products.

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Understanding ENERGY STAR: A Guide to Energy-Efficient Office Products

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  1. AN OVERVIEW OF ENERGY STAR Lisa Hopkinson University of Bradford

  2. LIFE CYCLE IMPACTS Transport Materials Recycling Disposal Manufacture Use

  3. ENERGY STAR • Voluntary labelling scheme for energy efficient office products • Defines minimum energy criteria • Database of most energy efficient models • Only deals with energy IN USE • Updated every 2-3 years • www.eu-energystar.org

  4. LIFE CYCLE ENERGY OF PCS Source: IVF, 2007. Preparatory studies for Eco-design Requirements of Energy Using Products

  5. ENERGY STAR STATUS

  6. UNIVERSITY OF SHEFFIELD – ICT ENERGY BREAKDOWN Desktops dominate Analysis by Chris Cartledge, 2008

  7. ENERGY STAR V. 5.0 –for Computing Equipment Covers desktop computers, gaming consoles, integrated desktop computers, notebook computers, small-scale servers, thin clients, and workstations. Efficient power supply (internal & external) required. Defines minimum energy performance standards

  8. TYPICAL ENERGY CONSUMPTION (TEC) Minimum annual energy consumption – based on weighted time spent in each mode (idle, sleep, off). For desktops and notebooks: ETEC = (8760/1000) x (Poff x Toff + Psleep x Tsleep + Pidle x Tidle)

  9. ENERGY STAR ENERGY PERFORMANCE Desktops: Notebooks: Category A ≤ 148kWh Category A ≤ 40kWh Category B ≤ 175kWh Category B ≤ 53kWh Category C ≤ 209kWh Category C ≤ 88.5kWh Category D ≤ 234kWh Different formulae and performance standards for workstations and small servers

  10. RAISING THE BAR Apr 2008: 137 models meeting Energy Star 4 June 2009: 875 models meeting Energy Star 4 1 July 2009: 0 models meeting Energy Star 5

  11. ENERGY STAR 4.0 vs 5.0 Energy Star 5, Category B, ETEC= 175 kWh/y Dell Optiplex 760 Desktop ETEC = 200 kWh/y (non networked)

  12. WHOLE LIFE COSTING • Energy Star 5.0, Category B = 175 kWh/y • Typical Energy Star 4 PC ~ 230 kWh/y Over 4 year lifetime (@ 12p/kWh): Energy Star 5 (Cat B) = £84 Energy Star 4 ~ £110 For 5,000 PCs, saving ~ £130,000

  13. IMPLICATIONS • Consider whole life costs of any purchase • Specify Energy Star compliance • OR select high efficiency low power PCs e.g. desktops based on laptop technology

  14. THANK YOU! For more information contact: l.m.hopkinson@bradford.ac.uk Tel: 01246-239289 www.susteit.org.uk www.heepi.org.uk

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