In the past 20 years, diabetes organisations around the world have recommended that people with diabetes aim to consume 45 — 60 per
cent of their energy intake from carbs.
Many offices may save up to 25 per
cent of the energy used to run the office simply by powering down the equipment during off - hours.
Solar technology meets 80 per cent of the school's electricity needs and geothermal heating covers 30 per
cent of the energy for the school's hot water.
So far, it had been assumed that dark energy comprised a maximum of one per
cent of all energy at the time the microwave background radiation was released.
At least 20
per cent of energy should come from renewable sources by 2020, the commission further states.
China's 12th Five - Year Plan includes ambitious proposals to reduce the carbon intensity of its economy by 17 per cent by 2015 and to have 15 per
cent of its energy come from non-fossil fuels by 2020.
The team, which includes Associate Professor Vincent Tan from the Department of Mechanical Engineering and Adjunct Assistant Professor Anand Sarma from the Department of Civil and Environmental Engineering, found that when a projectile is fired at a sand block at high speed, it absorbs more than 85 per
cent of the energy exerted against it.
LEDs save up to 90 per
cent of the energy consumed by traditional filament lighting technologies and are now considerably more efficient than fluorescent lamps, but the advantages go further.
Cells made from slices of semiconducting crystals such as silicon are the most efficient: some convert more than 20 per
cent of the energy of sunlight into electrical power.
A new Melbourne hotel will set new design standards in energy efficiency to help cut as much as 25 per
cent of its energy consumption, drawing on a $ 39 million investment commitment from the Clean Energy Finance Corporation (CEFC).
As Hannah Arendt points out in The Origins of Totalitarianism, efficiency is so subordinated to control that the totalitarian society can afford to spend 50 to 75 per
cent of its energies enforcing control of one sort or another on its citizens.
«Over 80 per
cent of our energy still comes from oil and gas, so we must think about how to make them more sustainable,» says Ranjith.
Besides exploiting its own reserves, the government also owns 67 per
cent of the energy company Statoil, which is investing in Canadian tar sands, among other projects.
Using waste heat from a coal plant to power the heat pump can mean 80 per
cent of the energy put into the slush can be retrieved.
The Pentagon's plans to meet 25 per
cent of its energy demands from renewables by 2025 could send benefits rippling throughout society
While incandescent light bulbs convert only 5 per
cent of the energy passing through them into light and compact fluorescent bulbs manage 20 per cent efficiency, LEDs routinely achieve 30 per cent or more.
Wastewater treatment is a huge consumer of electricity, accounting for 2 - 3 per cent of all power usage in western countries, and no less than 30 per
cent of its energy bill results from the need to remove nitrogen.
Chris Brockbank of project partner Torotrak, based in Leyland, UK, says over 70 per
cent of the energy recovered by the system can be converted into motive force to drive the car.
The team calculates that for a bioluminescent tree to compete with a street light, only 0.02 per
cent of the energy absorbed for photosynthesis would need to be diverted into light production.
Physical activity represents 25 per
cent of energy usage and the thermic effect of food (see p. 89) takes about 10 per cent.
Lighting accounts for 20 per
cent of the energy cost of running our schools and yet this can be halved by installing energy efficient LED lighting and reduced even further by the use of intelligent controls.
The new school will generate 10 per
cent of its energy requirements using a biomass wood pellet burning boiler to provide heating, and a photovoltaic array to generate additional electricity to the grid.
This optimised charging strategy saves up to ten per
cent of energy so as to extend the amount of travel time during which the vehicle runs on electrical power alone.
«The wind turbines, which can produce 100 per
cent of energy on one day and zero on another, were not blowing when needed most, providing less than 5 per cent of power and Jay Weatherill's big battery less than 1 per cent.»
The white paper put a very modest estimate on the deployment of solar by 2050, suggesting that it might at most account for 3 per cent of the nation's energy, and that solar PV would simply not be deployed when the renewable energy target expired in 2030 — at which stage solar would account for a mere 1 per cent of energy production
A standard tank has an efficiency rating of about 60 to 65 per cent, meaning 35 to 40 per
cent of the energy goes up the flue, or radiates out as the water sits in the tank.
In a recent study, a team of researchers from the National University of Singapore's (NUS) Faculty of Engineering found that sand can absorb more than 85 per
cent of the energy exerted against it, and its ability to resist the impact increases with the speed of the projectile, even at high velocities.
In addition to that, a 2006 study reported by the American Diabetes Association showed that replacing healthy fats with trans fats (so that trans fats accounted for eight per
cent of energy intake) led to a very significant weight gain (around seven per cent)- despite the fact that the amount of energy was the same.
Lee runs Project Laundry List, which estimates that dryers are responsible for 10 to 15 per
cent of the energy consumed by U.S. households.
Half received a diet in which no more than 35 per
cent of the energy came from fat, and in which saturated fat made up only one - third of the total fat.
Together, they calculated that the neutrinos needed to deposit only 1 to 2 per
cent of their energy in the outer core in order to revive the all - important shock wave.
For instance, a star called Beta Pictoris radiates 0.24 per
cent of its energy at far - infrared wavelengths, and is surrounded by a disc of dust which astronomers have actually photographed.
Twenty per
cent of its energy needs, it says, will come from such sources, while allowing some flexibility for countries such as France, which is dependent on nuclear power, to count that as part of their contribution to reducing the Continent's carbon footprint.
Energy use worldwide has grown by more than half since 1990, and 87 per
cent of our energy supply is provided by fossil fuels.
Up to 75 per
cent of the energy used by free versions of Android apps is spent serving up ads or tracking and uploading user data: running just one app could drain your battery in around 90 minutes.
It was Tony Blair who originally committed to the target, which demands the UK generate 20 per
cent of all energy from renewable sources by 2020.