08 May '11, 12am

Critical comments on "The Energy Report" by WWF and Ecofys

It can cost resources and energy to achieve a technically possible gain or saving. Following is an indication of the difference a thorough accounting might make in the case of car. The Report makes the common claim that electric cars are 4 times as efficient as petrol driven cars. This seems to be misleading because it doesn’t take into account several relevant factors. It seems to be a valid statement re the amount of energy in a petrol tank or battery needed to put a unit of energy through wheels, but a full accounting would include: The weight and size differences. The average petrol driven car might get 9 km per litre, but it will be 3-4 times the weight and internal space of a typical electric car. Size and weight cab be important for security in crashes. The loss of energy getting energy to the vehicle. The energy-return for petrol is quite high; only a small amount ...

Full article: http://www.energybulletin.net/stories/2011-05-08/critical...

Tweets

Unprecedented UN Report: Renewable Energy Costs to Drop, Use to Grow Substantially by 2030, but…

Unprecedented UN Report: Renewable Energy Costs...

cleantechnica.com 07 May '11, 9pm

While the report found that “the technical potential of renewable energies — especially solar — was substantially higher e...

IPCC: Almost 80 per cent of global energy to co...

businessgreen.com 09 May '11, 12pm

The full scale of the growth potential enjoyed by the global renewable energy industry has been underlined today with the ...

Climate Change Committee publishes renewable en...

foe.co.uk 09 May '11, 9am

Climate Change Committee publishes renewable energy report 9 May 2011 The Committee on Climate Change published its review...

The New Energy Economy: Can We Afford It?

The New Energy Economy: Can We Afford It?

triplepundit.com 09 May '11, 9am

The last piece of the puzzle, the piece that will make the RE market as hot as housing once was, is a global market in RE ...

Fracking the Future: How Unconventional Gas Thr...

desmogblog.com 06 May '11, 12pm

The United States is at the center of a high profile controversy over the threats posed by unconventional gas drilling, pa...

Small Efficiency Changes Save Big Bucks, Report...

environmentalleader.com 09 May '11, 4pm

Submeters, consumption analysis and maintenance of existing systems are three low-capital ways that companies can signific...

Exercise with an Energy Purpose

Exercise with an Energy Purpose

cleantechnica.com 09 May '11, 4pm

The average rider can produce between 125 and 300 watts using the Pedal-A-Watt. While this amount of power isn’t huge, man...