Solar Electric Materials an Energy Frontier Research center funded by the U s. Department of energy Office of Science Office of Basic Energy Sciences under Award Number DE-SC0001084 (Y. Z
the use of alternative fuels like biofuels electricity and hydrogen; and strong government policies to overcome high costs and influence consumer choices.
This approach includes reducing work the engine must perform--reducing vehicle weight aerodynamic resistance rolling resistance
hybrid electric vehicles such as the Toyota Prius; plug-in hybrid electric vehicles such as the Chevrolet Volt;
battery electric vehicles such as the Nissan Leaf; hydrogen fuel cell electric vehicles such as the Mercedes F-Cell scheduled to be introduced about 2014;
or electricity the high initial purchase cost is likely to be a significant barrier to widespread consumer acceptance the report says.
Each combines highly efficient vehicles with at least one of three alternative power sources--biofuel electricity or hydrogen.
Vehicles powered by electricity will not emit any greenhouse gases but the production of electricity and the additional load on the electric power grid are factors that must be considered.
To the extent that fossil resources are used to generate electricity the report says that the successful implementation of carbon capture
and storage will be essential. These vehicles also rely on batteries which are projected to drop steeply in price.
and long recharge times are likely to limit the use of all-electric vehicles mainly to local driving.
The most common choices would be to either burn it for electricity or dispose of the ash.
The key to Narayan's approach is the application of an electric field at approximately 100 volts per centimeter to the material.
and draw current from the electric field to the area --which raises the temperature along the grain boundary.
Preheating the grain boundary with an electric field is allowed what Narayan to lower the sintering temperature from 1450 C to 800 C
A typical BECCS system converts woody biomass grass and other vegetation into electricity chemical products or fuels such as ethanol.
The technology can be used in power plants paper mills ethanol processors and other manufacturing facilities. As a carbon-negative technology BECCS takes advantage of the innate ability of trees grasses
Approximately 60 percent of global CO2 emissions come from power plants and other industries fueled by coal natural gas and oil.
To make the process carbon negative researchers have proposed a BECCS co-fired power plant that runs on a mixture of fossil fuel (such as coal) and vegetation (wood grass or straw for example.
Unlike BECCS and biochar systems which produce electricity or fuels mechanical trees do not generate power
and Technology are the latest in a long effort to understand the environmental aspects of antibiotic resistance which threatens decades of progress in fighting disease.
The propagation of antibiotic resistance has been perceived as a medical or microbiology-related problem Alvarez said.
and/or oxygen through successive generations they found that in the absence of tetracycline both microbes dumped the resistance plasmid though not entirely in the case of E coli.
But P. aeruginosa completely shed the genetic element responsible for resistance which made it susceptible once again to antibiotics.
When a high level of tetracycline was present both microbes retained a level of resistance One long-recognized problem with antibiotics is that they tend to snatch defeat from the jaws of victory.
So there is incentive to eliminate the resistance plasmid from bacteria in the environment as close to the source as possible.
His study of the Haihe River in China funded by the Chinese government and published last year found tetracycline resistance genes are common in the environment there as well.
To support the goal of making the system available worldwide it had to be simple enough for field researchers to use consistently able to be transported in backpacks to locations without electricity
In the same forests the team also placed traps configured with decoys bearing a 4000-volt charge to electrocute
if the voltage was applied to the decoys. According to Domingue the light-scattering properties of the beetle's shell--which the team experimentally demonstrated using a white laser--made the nano-bioreplicated decoys more lifelike and therefore more attractive to males than the non-textured 3d printed decoy.
Laser pulses generated coherent bursts of terahertz radiation through a built-in surface electric field of the indium phosphide substrate that changed due to charge transfer between the graphene and the contaminating molecules.
Use of porous silicon oxide reduces forming voltage, improves manufacturabilityrice University's breakthrough silicon oxide technology for high-density next-generation computer memory is one step closer to mass production thanks to a refinement that will allow manufacturers to fabricate devices at room temperature with conventional
The basic concept behind resistive memory devices is the insertion of a dielectric material--one that won't normally conduct electricity--between two wires.
When a sufficiently high voltage is applied across the wires a narrow conduction path can be formed through the dielectric material.
It can be manufactured at room temperature has an extremely low forming voltage high on-off ratio low power consumption nine-bit capacity per cell exceptional switching speeds and excellent cycling endurance.
First the porous material reduced the forming voltage--the power needed to form conduction pathways--to less than two volts a 13-fold improvement over the team's previous best and a number that stacks up against competing RRAM technologies.
Tour said the latest developments with porous silicon oxide--reduced forming voltage elimination of need for edge fabrication excellent endurance cycling
's power plants. Our technique allows one to specifically remove carbon dioxide at the source. It doesn't have to be transported to a collection station to do the separation he said.
nchez researcher in the Department of Electrical engineering some factors that may increase the cost of acquiring the import greenhouses are the level of sophistication of its technologies for automation its size
Coal-fired power plants produce a lot of pollution so any measures that will reduce our combustion of coal will also help us to fight air pollution.
This will be particularly important for China he said which has been plagued by skyrocketing air pollution from coal power plants used to fuel its industrial expansion.
Experts estimate that a quarter of a million people die prematurely each year in China because of air pollution from the country's coal-fired power plants.
when solar power was more of a novelty source of energy for individuals who were too far from power lines to get conventional electricity from the grid.
Today we build large power plants that can supply entire cities with renewable electricity. In fact today we install the equivalent of 100 large coal-fired power plants--the same capacity in renewables--every year he said.
However we haven't started phasing out the coal-fired power plants so this needs to happen too.
The good news is that the WG III report presents a full range of options for action.
and moving parts and electrical engineers to design control systems Linden said. Tests have shown that each of the eight fiber-optic cables can produce between 80 and 90 watts of energy meaning the whole system can deliver up to 700 watts of energy into the reaction chamber said Linden.
In late December tests at CU-Boulder showed the solar energy directed into the reaction chamber could easily boil water
Corn cubs and sugar canes are in fact plant parts that can also be used directly as food so there is a great public resistance to accept producing this kind of bioethanol.
and that movement can be harvested to generate electricity. If this technology is developed fully it has a very promising endgame said Ozgur Sahin Ph d. who led the study first at Harvard's Rowland Institute later at the Wyss Institute
But until now no one has tapped that energy to generate electricity. As Sahin pursued the idea of a new humidity-driven generator he realized that Mahadevan had been investigating similar problems from a physical perspective.
As the cantilever flips back and forth in response to moisture it drives a rotating magnet that produces electricity.
If changes in humidity could be harnessed to generate electricity night and day using a scaled up version of this new generator it could provide the world with a desperately needed new source of renewable energy.
it's time for the health sector to get involved Earthquake could threaten California water supply Invention may lead to greener power plants Accidental environmentalist designs furniture from invasive species
We have demand for both thermal energy as well as electricity. This fuel can be used to drive generators, much more efficient than the steam process.
and instead of purchasing electricity generated outside our state from fossil fuels, we're pouring our dollars into our local economy.
We're pretty comfortable that this technology is able to produce electricity at 12 cents per kilowatt-hour.
Firm electrical power. You can't do that with solar you can't do that with wind.
how can we accelerate the decline to achieve the elusive $1/watt price where clean technologies are price-competitive with fossil fuels?
We think that even at $1. 50 a watt, this will go viral, he said.
Our goal is to be aã Â powerhouse in industrial biotechnology. BIOFUELS On the biofuels side, Dupont is working simultaneously on cellulosic ethanol--for
In the U s.,49 percent of the water used in the industrial market goes to generate power for thermal power plants:
A big power plant uses a boatload of water. The primary use is to cool those processes--the big hyperbolic cooling towers.
It takes about 5 million gallons a day of water for a 1, 000 megawatt power plant.
Why is there such water demand from power plants? Can't they reuse it? JF: Often what happens is the water that leaves the plant is less than
but a lot more expensive than a coal power plant. Early on, it needed incentives to get started. Similarly
when James Watt invented his steam engine. And we started pumping out CO2 by burning coal.
Two students at MIT School of architecture are attempting to capture the untamed energy of urban crowds and convert it into a source of electric power.
The Renaissance Computing Institute in North carolina has developed an Outpatient Health Monitoring System (OHMS) for patients with chronic conditions such as asthma.
direct current (DC) in a ceiling grid and alternating current (AC) in a floor or wall grid.
synthetic fuels, biofuels, electricity, hydrogen, etc. â agriculture and food production: engineered crops, pest control, fertilizers, etc. â environmental protection and remediation:
< Back - Next >
Overtext Web Module V3.0 Alpha
Copyright Semantic-Knowledge, 1994-2011