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Posts Tagged ‘Technology’

The term media technology provides highly scalable and various areas of technology , can cover as well:
broadly, the whole ” high tech “;
Narrow, new information technology and communication (ICT) ( Internet , iPhone , Nano Station Mod Protocol Bluetooth …).
The term corresponds to a meaning derived from the word technology , which etymologically means “study techniques “( Greek tekhne, logos) .
NICT together the innovations made ​​in terms of storage volume and speed of processing information and its transmission through the digital and new means of telecommunication ( fiber optics , cable, satellite, wireless). Their impact extends to multiple areas, including our lifestyle and our economy. Sectors of production and use of these new technologies gain an increasing share of GDP of developed and emerging economies, hence the concept of “new economy” or ” knowledge economy “. This does not eliminate the traditional economy, but made ​​knowledge and understanding , key elements of economic competitiveness .
Because of the risk , nuisance or threats that would include some of these new techniques, different groups or individuals seeking to fight against their development and the type of society they produce: they are a common protest called an anti-industrial .

One of the biggest hurdles with wind and solar energy is that both can be highly variable, which has raised doubts about whether either source is reliable enough to provide “base load” energy, the minimum amount of energy that must be available to customers at any given hour of the day.

Jacobson said that the variability can be overcome.

“The most important thing is to combine renewable energy sources into a bundle,” he said. “If you combine them as one commodity and use hydroelectric to fill in gaps, it is a lot easier to match demand.”

Wind and solar are complementary, Jacobson said, as wind often peaks at night and sunlight peaks during the day. Using hydroelectric power to fill in the gaps, as it does in our current infrastructure, allows demand to be precisely met by supply in most cases. Other renewable sources such as geothermal and tidal power can also be used to supplement the power from wind and solar sources.

“One of the most promising methods of insuring that supply matches demand is using long-distance transmission to connect widely dispersed sites,” said Delucchi. Even if conditions are poor for wind or solar energy generation in one area on a given day, a few hundred miles away the winds could be blowing steadily and the sun shining.

“With a system that is 100 percent wind, water and solar, you can’t use normal methods for matching supply and demand. You have to have what people call a supergrid, with long-distance transmission and really good management,” he said.

Another method of meeting demand could entail building a bigger renewable-energy infrastructure to match peak hourly demand and use the off-hours excess electricity to produce hydrogen for the industrial and transportation sectors.

Geothermal and hydroelectric sources Contribute Would Each about 4 Percent in Their plan (70 Percent of the hydroelectric is Already in place), with 2 Percent Remaining from the wave and tidal power.

Vehicles, ships and trains Would Be powered by electricity and hydrogen fuel cells. Aircraft Would run on liquid hydrogen. Homes Would Be Warmed and cooled with electric heaters – no more natural gas or coal – and Would Be preheat water by the sun.

Commercial procesos Would Be powered by electricity and hydrogen. In all Cases, the hydrogen Would Be Produced from electricity. Thus, wind, water and power sun Would the world.

The Researchers Approaches: a the conversion with the goal That by 2030, all new energy generation from wind Would eat, water and solar, and by 2050, all pre-existing energy production as well Would Be Converted.

“We wanted to QUANTIFY What is NECESSARY in order to replace all the current Energy Infrastructure – for all Purposes – with a really clean and Sustainable Energy Infrastructure Within 20 to 40 years,” Said Jacobson.

One of the Benefits of the plan is That it results in a 30 Percent Reduction in world energy demand since it’s combustion processes Involves converting to electrical or hydrogen fuel cell processes. Electricity is much more efficient combustion Than.

That reduction in the amount of power needed, along with the millions of lives saved by the reduction in air pollution from elimination of fossil fuels, would help keep the costs of the conversion down.

“When you actually account for all the costs to society – including medical costs – of the current fuel structure, the costs of our plan are relatively similar to what we have today,” Jacobson said.

If Someone Told You There Was a Way You Could save 2.5 million to 3 million lives a year and Simultaneously halt global warming, reduce air and water Pollution and Develop secure, reliable energy sources – Nearly all with Existing technology at Costs and What We comparable with spend on energy today – Why Would you do it?

According To a new study coauthored by Stanford researcher Mark Z. Jacobson, All That We Could ACCOMPLISH by converting the world to clean, Renewable energy sources and forgoing fossil fuels.

“Based on Our Findings, There Are no or Technological Barriers to Economic Entire converting the world to clean, Renewable energy sources,” Said Jacobson, a professor of Civil and Environmental Engineering. “It is a question of whether societal and We Have the Political Will.”

He and Mark Delucchi, of the University of California-Davis, Have Written a two-part paper in Energy Policy in Which They Assess the Costs, technology and material Requirements of converting the planet, They plan using a developer.

They envision Would the world run largely on electricity. Their plan calls for using wind, water and solar energy to generate power, with wind and solar power Contributing 90 Percent of the Need energy.