This incessant march of energy density (more energy per unit of raw material) has undeniable logic, deniable only by the illogical or irrational.
This incessant march of energy density (more energy per unit of raw material) has undeniable logic extending along the entire length of the arrow of progress.
We're resigned to the fact that the constantly increasing power demands of modern gadgets will always outstrip slow increases in the energy density of batteries: however, high energy density is not the only factor that goes into making a good battery.
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Proponents point to the enormous energy density of the fuel (the amount of energy contained per unit).
Energy density refers to the quantity of energy that can be contained in a given unit of volume, area, or mass.
United Technologies is a fuel cell leader, and David Parekh, director of the United Technologies Research Center, says that expertise has allowed the company to improve the energy density of a standard flow battery by 10 times, albeit on a small scale.
The batteries themselves make use of the same zinc air technology used in hearing aid batteries, and apparently have the highest energy density of any portable consumer power solution, which translates to about three times the runtime of a similarly sized alkaline or lithium ion battery.
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The result is a material that has an energy density of about 0.005 watt-hours per kilogram.
But for anything much bigger, the energy density of aviation fuel still looks to be unbeatable.
Increasing the operating voltage will boost the energy density of the composite significantly.
In liquid form, butane has an energy density of 7.4 kilowatt-hours per liter.
The multi-layered sheets can achieve twice the energy density of commercial supercapacitors.
Many companies are working on coming up with better materials for the cathode or the anode in order to increase the energy density of the battery cell.
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And the low energy density of biomass--corn, switchgrass, wood, etc.
Chu conceded that oil is a unique fuel, pairing high energy density with ease of transport.
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This type of battery has an unusually high energy density, which means the units can be smaller and thus lighter for a given amount of power than traditional batteries.
Bosch reckons that for electric cars to become universally popular, a threefold increase in energy density and a fall of two-thirds in the price of batteries will be needed.
Without any intervention from politicians or environmentalists societies that progress have been using m ore fuels that have less carbon with higher energy density (1 kg of wood fuels a light bulb for 1 day, 1 kg of coal fuels a light bulb for 4 days, 1 kg of crude oil for 5 days, 1kg of methane for 6 days and 1 kg of uranium for over 140 years).
Oil is found in relatively few places, and its energy density, pumpability and ease of use in internal-combustion engines makes it particularly well suited as a transportation fuel.
While the residents of Samso can take advantage of their island's blustery weather, open spaces and low-population density to be carbon neutral, the success of wind energy on a global scale may come down to simple economics.
The figure is a measure of circuit track density and broadly relates to processing power and energy consumption.
Plus, according to Andy Chu, vice president of marketing and communications at battery-maker A123, because hybrids do not rely solely on electric, they can afford to sacrifice some energy density and stick with the NiMH without fear of running out of juice.
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But in front of the focus, and behind it, the energy density is lower, and little or no damage is done.
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This extreme density reduces, per a given unit of work, the datacenter size, energy consumption, complexity and cost.
Instead of being stored in batteries, the electricity made by solar panels can be used to split water into oxygen and hydrogen molecules, the latter of which can be used as a fuel with high energy density.
Power density refers to the energy flow that can be harnessed from a given unit of volume, area or mass.
The energy demands of these manufacturing sites are significant, given their sheer numbers and density.
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The automakers need to come out with battery packs that can retain a greater percentage of their storage capacity for longer, cost half as much, and have improved energy density, so that they can serve many driving cycles.
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