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Sergio Ferreira's Library tagged efficiency →  View Popular

28 Apr 09

Energy efficiency: Beat the bust by going green | poweredByProfit | Canadian Business Online

  • spending US$100,000 on a system that will automatically turn its computers off after the updates. It will save at least US$1 million per year in power costs. That’s an IRR of 1,000%, for a payback period of just over five weeks.
  • almost 40% of the strategies for meeting targets of the Kyoto treaty on climate change can be achieved at a profit.
  • 1 more annotations...
12 Mar 09

Commission pushes ICT use for Energy Efficiency

  • These technologies are expected to reduce total carbon
    emissions in Europe by up to 15% by 2020. ICT can not only improve monitoring
    and management of energy use in factories, offices and in public spaces but
    above all help make people more aware of how they use energy.
  • The ICT sector itself is responsible for 2% of carbon emissions in Europe:
    1.75% resulting from the use of ICT products and services, and 0.25% from their
    production
  • 4 more annotations...
17 Feb 09

The energy efficiency of cars

  • That future is electric vehicles powered by high ERoEI renewable electricity.
  • ERoEI for wind ~ 20, efficiency factor = 0.95

    Grid transmission losses = 0.9

    Battery efficiency = 0.97

    Motor efficiency = 0.92
12 Nov 08

EU to ban the patio heaters that ate the planet. Not. • The Register

  • calling on the European Commission to set a timetable for the withdrawal from the market of these and other "very energy-inefficient items of equipment
  • Overall, however, the Commission action plan focuses on specific categories of device and appliance with a view to setting minimum performance standards for them in terms of energy efficiency. It doesn't call for the outlawing of specific categories of activity or appliance on the grounds that they're stupid, unethical or evil, it merely attempts to ensure that the energy used by these activities and appliances is used efficiently.
  • 2 more annotations...
13 May 08

Commission casts ICT in green role

  • improve energy efficiency
    throughout the economy, starting with buildings, lighting and the power grid
  • ICT could make not only the management of
    power grids more efficient but also facilitate the integration of renewable
    energy sources.
17 Apr 08

eceee: Danish Electricity Saving Trust updates purchasing guidelines

  • The Danish Electricity Saving Trust’s 2008 Purchasing Guidelines are now available in English.
  • The method is to specify user requirements before electrically powered products appear in the shopping baskets of the municipalities.
  • 2 more annotations...
27 Mar 08

A Ship That Floats On Bubbles | Got2BeGreen

  • The bubbles travel along the hull, reducing friction and thus, increase gas mileage. Since ships are one of the largest consumers of diesel fuel in the world, so this idea is meant to get some attention along with some other ideas like boats attaching a giant wind turbine or adding parachute-like sails on the ship to increase efficiency.

Technology Review: More-Powerful Solar Cells

  • 1366 Technologies claims that it improves the efficiency--a measure of the electricity generated from a given amount of light--of multicrystalline silicon solar cells by 27 percent compared with conventional ones
  • today, solar cells cost about $2.10 per watt generated. When manufactured at a commercial scale, the first cells incorporating his new technology will cost $1.65 per watt. Planned improvements will bring down this cost to about $1.30 a watt, he says. To compete with coal, the cost will need to come down to about $1 a watt, something that Sachs predicts can be achieved by 2012 with further improvements in antireflection coatings and other anticipated advances.
  • 1 more annotations...
28 Feb 08

Energy performance in Buildings Directive - infringement procedures

  • launched court
    proceedings against Belgium and the United Kingdom for failure to notify
    adequate national implementing measures as required by the 2002 Energy
    Performance of Buildings Directive    [1].
    The goal of the Directive is to reduce energy consumption in buildings and it
    thus forms an important part of EU legislation aimed at improving overall energy
    efficiency.
  • completely specified energy performance
    requirements for buildings and for inspection requirements for boilers and air
    conditioning systems
  • 4 more annotations...
22 Feb 08

EU plans mandatory energy-efficiency standards for ICT | EU - European Information on InfoSociety

  • ommission already proposed in its energy efficiency action planPdf
    external
     of 2006, the use of smart technologies in buildings can play a crucial role in decreasing consumption.
  • mandatory public-procurement standards" in order to achieve more energy-efficient utilisation of information and communication technologies.
  • 2 more annotations...
15 Feb 08

Miles per dollar

  • I agree with that logic, though from my perspective "mp$" could be even more useful as we enter a world in which the gallons we're using aren't directly comparable, and as electricity enters the transportation mainstream, resisting easy conversion to gallons without heroic assumptions and creating potentially over-optimistic assessments of the overall efficiency of plug-in hybrid cars.
  • Miles per dollar has much to recommend it, particularly for its simplicity and alignment with the priority consumers put on value. However, it also has two key disadvantages. Unlike mpg, it changes every time fuel prices do, so any comparisons based on mp$ are only snapshots at a point in time. Nor does it address the emissions associated with that dollar's worth of energy, though mpg doesn't do that, either.
13 Feb 08

EERE News: Europe Falling Short of Renewable Energy Goals for 2010

  • the European
    Union (EU) falling far short of its goal to use renewable energy for
    12% of its energy needs by the end of 2010. As of the end of 2006, the
    EU is at 6.92% renewable energy, having posted an impressive 0.46%
    gain relative to 2005
  • reason for the shortfall is that the growth in renewable energy is
    struggling to compete with a growth in energy demand
  • 1 more annotations...
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