ICT Sustainability: Assessment and Strategies for a Low Carbon Future

Methods and Tools

Methods and tools can be used in the planning, development, operation, management and maintenance of systems for Energy saving and to plan Materials Use.

Analysis of ICT in energy use

The Climate Group, provide three appendices for their SMART 2020: Enabling the low carbon economy in the information age (2008):

1. Scope, process and methodology,
2. The Direct Impact Assumptions,
3. The Enabling Effect Assumptions.

These technique can be used both for estimating the carbon footprint of ICT and how it may be used to reduce emissions in other sectors by using ICT.

The analysis measures emissions CO₂e, assuming, the ICT sector covered:

• Personal Computers (PCs) and peripherals: workstations; laptops; desktops and; peripherals such as monitors and printers
• IT services: data centres and their component servers; storage and cooling
• Telecoms networks and devices: network infrastructure components; mobile phones; chargers; broadband routers and IPTV boxes.

The study excluded consumer electronics in the home: TVs, video, gaming, audio devices and media players. Specialised electronic devices, such as medical equipment was also excluded. Different assumptions would need to be made for organisations in specific industry sectors. As an example, a games software developer could not exclude computer games and a hospital not exclude medical devices.

Staged study

The Climate Group carried out three phases of their study:

1. Quantify the global impact of ICT: Models were developed for the direct footprint and the indirect (enabling) opportunities.
2. In-depth case studies: Emissions reduction opportunities using ICT were developed.
3. Assessment of imperatives for stakeholders: Workshops were conducted to investigate opportunities and barriers for: technology providers, technology users, investors and regulators.

Direct ICT impact (footprint) methodology

The Climate Group used published estimates of global emissions and penetration rates of ICT devices and infrastructure. Estimates of population growth were then used to calculate future emissions in 2020. Data was from public studies; academic and industry literature; the team experts, consumer surveys and interviews with external experts.

The analysis attempted a "cradle-to-grave" estimate of carbon emissions: manufacture, transport, use and disposal of equipment.

Embodied carbon: CO₂e in manufacturing of ICT components was calculated from public and company data. Embodied energy in end-of-life treatment: disposal, landfill and recycling, was included where data was available.

Energy consumption of the components based on publicly available company data. An emissions factor was used to calculate the carbon emissions from energy consumption. The emissions from electricity generation vary depending on the technology used. The Climate Group divided the world into regions and used a different emissions factor for each region. Transmission losses in the electricity grid were similarly estimated.

Market growth and penetration of devices to 2020 was based on industry reports and internal analysis. Growth in use of ICT and general industrial growth is more significant in developing areas of the world.

Enabling impact methodology

The Climate Group used a cost curve to identify emissions abatement solutions ranked by cost. The study concentrated on areas where emissions are significant: power; manufacturing; industry; transport; residential and commercial buildings; forestry; agriculture; and waste disposal. ICT applications were then assessed for use in reducing in emissions abatement on the cost curve. Four uses for ICT were then selected for detailed analysis.

Direct impact assumptions

The Climate Group were undertaking a high level global analysis and therefore used some very general assumptions in their analysis. As an example: 20% of desktops are workstations, Workstations consume 2.5 times desktop in all modes, Commercial usage of a computer is 14 hours/day versus consumer usage of three hours/day, Three types of servers: 200, 500, 6000W/unit. These assumptions are listed in Appendix 3: "The Enabling Effect Assumptions" of the report (The Climate Group, 2008). An analysis for an organisation may use locally developed estimates or actual measures, but may also use these same assumptions, in order to enable a direct comparison.

Enabling effect assumptions

The Climate Group made assumptions as to the effect ICT could have on other industry areas. As an example, it was assumed that on-line media would replace DVDs and CDs. This assumed seven billion DVDs and 10 billion CDs globally were sold per year, with 1 Kg CO₂e per CD/DVD and all this would be replaced with network delivery of content by 2020. Similarly electronic documents were assumed to reduce paper use by 25%. Organisation based studies should be able to use better estimates or local measures of disk and paper use.

Estimating Power Management Savings for Computers

The Foundation for IT Sustainability (FFITS) provide instructions to Activate power management on Windows 7 (FFITS, 2011a) and two versions of an Energy Savings Calculator (FFITS, 2011b) to estimate the resulting savings. The Consortium for School Networking provide an Energy Usage Calculator (CoSN, 2010) specifically tailored for schools.

FFITS provide instructions to configure power management for operating systems including Apple Mac, Microsoft Windows XP and Vista. They recommend setting computers to enter system standby or hibernate after 15 to 30 minutes of inactivity and set monitors to enter sleep mode after 5 to 20 minutes of inactivity. On laptops, these need to be activated in the AC power profile, as well as battery power) profile.

FFITS provide a Power Management Calculator. The web based form prompts for the number of Monitors and Computer boxes to be power managed and the price of electricity (with a default in Australian average), Hours in Workday and Days in Work week. Defaults are provided for the Active Power and Sleep Power (in watts) used by monitors and PCs. Estimates of the proportion of units power managed, Units Turned Off After Work are used and Tons CO2 are calculated.

It should be noted that these calculators use a fixed conversion factor for estimating carbon dioxide emissions from electricity used. The conversion factor varies from state to state in Australia and country to country around the world, depending on how electricity is generated. As Australia uses predominately coal fired power, an Australian calculator will give a higher estimate than a US calculator, where less coal is used.

Now Read

1. Scope, process and methodology (Appendix 1), The Direct Impact Assumptions (Appendix 2), and The Enabling Effect Assumptions (Appendix 3) of SMART 2020: Enabling the low carbon economy in the information age, by The Climate Group (2008)
2. Activate power management on Windows 7 (FFITS, 2011a)
3. Energy Savings Calculator (FFITS, 2011b)
4. Energy Usage Calculator (CoSN, 2010)

Questions

1. Use an energy usage calculator: Use an energy usage calculator to estimate the power use and greenhouse gas emissions of your organisation's computers. List the assumptions you made.
2. Assumptions about energy use: The Climate Group made many assumptions about energy use by computers in their SMART 2020 report. Identify one of the "The Direct Impact Assumptions" (Appendix 2) which does not apply in your organisation, region or industry sector. What figures would you use and why?

Next: Sustainability Strategy.

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About the book: ICT Sustainability: Assessment and Strategies for a Low Carbon Future

ICT Sustainability is about how to assess, and reduce, the carbon footprint and materials used with computers and telecommunications. These are the notes for an award winning course on strategies for reducing the environmental impact of computers and how to use the Internet to make business more energy efficient.

Title: ICT Sustainability: Assessment and Strategies for a Low Carbon Future

Copyright © Tom Worthington, 2011

ISBN: 978-1-4478-1454-2. (Paperback and PDF published by Lulu)
ISBN: 978-1-4478-6164-5. (ePub eBook published by LuLu and available via Apple iTunes)
ISBN: 978-0-9806201-9-1. (Kindle eBook published by Tomw Communications Pty, Limited)

These notes are used for the courses:

1. Green Technology Strategies: offered in the Computer Professional Education Program, Australian Computer Society (first run as "Green ICT Strategies" in February 2009),

2. Green Information Technology Strategies (COMP7310), in the Graduate Studies Select program, Australian National University (first run July 2009), and

3. Green ICT Strategies (ACS25): offered in the Postgraduate Program of Open Universities Australia from 2010,

A North American version of the course by Brian Stewart, Athabasca University (Canada) is also available: Green ICT Strategies (COMP 635).

The notes were first published in 2009 ("Green ICT") and updated 2010 ("Green Technology Strategies"). Students can download or print their own copy of the e-book from the course learning management system, which is likely to be more up to date.

The web version of ICT Sustainability: Assessment and Strategies for a Low Carbon Future by Tom Worthington is licensed under a Creative Commons Attribution-ShareAlike 3.0 Australia License.

See: http://www.tomw.net.au/ict_sustainability