Energy Star is a voluntary appliance specific labelling scheme that was devised in 1991 following a US gvt decree that required an energy labelling scheme for US public procurement. It was set up as an initiative by US Environmental Protection Agency and the US Department of Energy. Initially the scheme only covered office equipment but has since expanded in the US to include white goods, air conditioning, lighting and many others. The scheme rapidly spread to other regions of the globe. In 2003 there was an agreement between the EU and the US government to co ordinate energy labelling of office equipment within the US and the EU. Energy Star is now the officially ratified energy labelling standard for office equipment in the EU region. If you refer to the UK government buying standards for IT equipment the standard refers to the energy star standard as a minimum requirement. Importantly the standard currently only covers energy use during the use phase of the product lifecycle and does not take into account the energy use during production or the energy required to produce associated supplies. The standards are regularly updated , the current standard for Computers is V5.0.
There are 2 excellent facilities on the EU energy star website. Firstly you can compare the relative energy efficiency and performance of equipment with similar specification. For example for desktop computers you could enter brands and operating systems as a first pass filter. The site will display energy star rated products that fulfil the criteria input to allow you to compare relative energy efficiency. Categories in this case A – D are product specific and indicate the general category of the product. You are also provided with some power consumption information. The energy star standard specifies how and when this is measured to insure uniformity of measurement methods. ETEC in this case is typical annual electricity consumption for the product based on the protocol of 55% of the time in standby, 5% in sleep and 40% in idle mode.
With the calculator on the site there is the facility to change all the values to create an estimate of energy usage based on your own real world situation instead of using the standard protocols. The site will estimate usage and costs.
See the 28 page document.
This chart shows that category products that are accredited can still vary greatly in power usage.The energy values quoted on the energy star site make the assumption that energy saving features are not disabled during configuration or by users at a later date. As an example the best and worst performers on the chart shown here vary in cost estimate by £12.54 pa. If the power management facilities are disabled on the worst performer it instantly becomes the worst performer and the etec changes from 131.6 to 309.2 kWh.
Would anybody like to take a guess at what these products are?Investigators from the US Government Accountability Office (GAO) submitted 20 fake products for accreditation to energy star. Of the 20, 15 were granted energy star rating ! Here you can see a gas (petrol) powered alarm clock and a room air cleaner a convector heater with a feather duster attached) which were both successfully rated.Up until this point the accreditation process could be completed by a manufacturer simply submitting performance values for approval without any 3rd party accreditation or validation. The point to take away here is that not only are products with historic energy star rating not necessarily equally energy efficient due to the constantly updated standard but also that products accredited to energy star prior to 2010 did not require 3rd party validation.
EMS requires us to address direct and indirect impacts by significance. It is common that we focus on the energy use of IT products during the in use phase.The first pie chart shown here is to indicate that yes 79% of energy use occurs in the use phase but we also need to consider the manufacturing stage as this could be up to 20% of the total energy consumption during the lifecycle. Your business may be purchasing green electricity or CHP energy to mitigate the 79% but you will probably have no control over the 20% unless you pressure manufacturers to manage their supply chain emissions.The second pie chart attempts to show the energy impact relating to print output devices such as MFD or printer / copier equipment.The energy required to operate the device during the in use phase may account for only 2 % of the total energy required for the in use phase. The indirect energy requirements to produce the paper and toner required by the device may account for 98% of the energy impact of the device. So whilst the energy use is important for our EMS the use of supplies may be an even more significant impact.
Its not just what you’ve got it’s how you use it.CSC have deployed a power management software product across our global desktop and laptop fleet. For our own in house devices the power management and reporting capability has allowed CSC to achieve a 40% reduction in desktop device energy consumption.We have then gone on to run a trial of the server edition of this product on a selected sample of our data centre servers.You can see from the first pie chart that although 68% of our trial sample were productive over 99% of the time we discovered that 11% were productive under 25% of the time.The second pie chart shows us that the software identified 22% of our servers were wasting energy over 85% of the time. It has to be stated that not all the servers identified as inefficient have the power management capabilities that could improve the situation however it helps us to identify areas whwer we can make improvements.You can see the quote from John Glawoki our Corportae VP and Chief Technology Officer.
For the power usage in use element of output devices, even though we have previously identified this may be a smaller element than the indirect energy of supplies we can still make substantial savings by moving away from the traditional situation of desk top printers and towards centralised print facilities.CSC have introduced a policy of removing individual devices and installing shared MFD devices.The figures here show a worked example of transferring the outputs from 15 individual devices onto 3 shared MFDs. The total energy usage per month has dropped to approximately a fifth of the original usage for the same volume of output led mainly by the low sleep consumption of the more up to date devices and the fact that there are now less of them.The message here is that when considering changing to new energy star accredited devices think further than just swapping 1 for 1 and consider alternative implementations that may bring far greater savings in terms of energy. Shared print facilities also offer greater opportunity to control printing with systems such as follow me or proximity card systems and controls to default to 2 sided etc.
Robert Jones - CSC Ltd Energy Star North Hants 05/05/2011
Energy Star labels and Information Technology<br />Rob JonesEnvironmental Manager CSC UK<br />May 2011<br />
Energy Star<br />Voluntary – appliance specific – energy labelling scheme.<br />Sets minimum energy efficiency standards by item type.<br />Created in 1991 partnership with US EPA and Dept of energy.<br />1992 first accredited products including PCs and monitors.<br />Only covers energy in the in use phase of the lifecycle.<br />2003 EU agreement for office equipment only.<br />Quoted in UK Govt buying standards.<br />Standards updated regularly .<br />www.eu-energystar.org<br />
What does V5.0 Energy Star really mean?<br />Labelled electronically or physically.<br />User information requirements.<br />Power management.<br />Item must fit Energy Star definition (ie Desk top computer, thin client, workstation etc)<br />Internal PSU 85% efficiency at 50% of rated output 82% at 20 and 100%<br />External PSU Must meet Energy star spec for external PSU (separate)<br />TEC <br />Category A ≤ 148 kWh<br />Category B ≤ 175 kWh<br />Category C≤ 209 kWh<br />Category D≤ 234 kWh<br />+ allowances for additional memory and HDD’s<br />
Examples of variance in accredited products<br />ETEC = Min kWh pa ((1.4 x 0.55) + (3 x 0.05) + (35.3 x 0.4)) x (8760/1000)<br />Best to worst difference £12.54 pa<br />With power management disabled (by employee?) best ETEC changes from 131.6 to 309.2<br />Running cost and carbon impact increase by an additional 134%<br />
Energy Star – A cautionary tale<br />“US agencies toughen up Energy Star standards after embarrassing lapses<br />Undercover investigators gain Energy Star accreditation for phony gas-powered alarm clock “<br />Business Green. 16 Apr 2010 <br />
Limitations of Energy Star Labelling.<br />Manufacturers able to submit own data for accreditation.<br />May be substantial variation in compliant product performance.<br />Values are comparative and do not take applications into account.<br />No account of production and supply impact<br />How you manage usage is as important<br />Configuration may disable power management features.<br />
EPEAT – A more comprehensive standard.<br />www.epeat.net<br /><ul><li>Graded performance bronze / silver / gold.
Packaging.</li></li></ul><li>Use phase energy consumption is important but How important?<br />European Commission – Energy Star – Eco Profiles<br />
Managing usage – Example 1 CSC deployment of NightWatchman ®<br />The most energy efficient and energy star rated PC’s and servers can waste power if not managed correctly.<br />CSC have employed NightWatchman ® across 50,000 PC’s with 40% reduction in desktop energy consumption.<br />CSC have trialled NightWatchman ® Server edition on 68 Servers.<br />In summary, the pilot has been a positive experience for CSC, with results that provide insight into all areas of data center management. “If asked what the pilot has taught us,” says John Glowacki Jr., Corporate Vice President and Chief Technology Officer, CSC , it would be that we run a tight ship and manage our server fleet well; but also that even a well managed fleet can find efficiency improvements with Server Edition.” <br />
Managing usage – Example 2 Print Rationalisation<br />At quoted monthly volumes existing devices used a combined<br />total of 296.20 kWh of electricity per month.<br />59.22 kWh printing.<br />163.95 kWh in stand by.<br />73.02 kWh out of hours.<br />At quoted monthly volumes the rationalised solution uses a combined<br />total of 52.06 kWh of electricity per month.<br />33.01 kWh printing.<br />17.51 kWh in stand by.<br />1.46 kWh Out of hours.<br />