Every hour the sun beams onto Earth more than enough energy to satisfy global energy needs for an entire year. Solar energy is the technology used to harness the sun's energy and make it useable. Today, the technology produces less than one tenth of one percent of global energy demand.
Group items matching
in title, tags, annotations or urlWhat Is Hydrogen? (with picture) - 1 views
Solar Power Energy Information, Solar Power Energy Facts - National Geographic - 0 views
-
-
In one technique, long troughs of U-shaped mirrors focus sunlight on a pipe of oil that runs through the middle. The hot oil then boils water for electricity generation. Another technique uses moveable mirrors to focus the sun's rays on a collector tower, where a receiver sits. Molten salt flowing through the receiver is heated to run a generator.
-
Despite the drawbacks, solar energy use has surged at about 20 percent a year over the past 15 years, thanks to rapidly falling prices and gains in efficiency. Japan, Germany, and the United States are major markets for solar cells. With tax incentives, solar electricity can often pay for itself in five to ten years.
- ...1 more annotation...
-
" Today, the technology produces less than one tenth of one percent of global energy demand."
-
Intriguing facts about the suns energy on how they use it on oil and the drawback
-
Every hour the sun beams onto Earth more than enough energy to satisfy global energy needs for an entire year. Solar energy is the technology used to harness the sun's energy and make it useable. Today, the technology produces less than one tenth of one percent of global energy demand.
Fuel Cell Vehicles - 0 views
-
FCVs run on hydrogen gas rather than gasoline and emit no harmful tailpipe emissions.
NREL: Hydrogen and Fuel Cells Research - Renewable Electrolysis - 0 views
-
Renewable electrolysis is a process that uses renewable electricity to produce hydrogen by passing an electrical current through water. Renewable energy sources such as photovoltaics, wind, biomass, hydropower, and geothermal can provide clean, sustainable electricity for our nation
-
Wind turbines can be used to produce hydrogen through a process called renewable electrolysis.
Hydrogen Fuel Cells - Where Do We Go - 2 views
Energy Resources: Solar power - 0 views
-
Advantages
-
Solar energy is free - it needs no fuel and produces no waste or pollution.
-
Handy for low-power uses such as solar powered garden lights and battery chargers, or for helping your home energy bills.
- ...3 more annotations...
A Pollution-Free Hydrogen Economy? Not So Soon | MIT Technology Review - 0 views
-
There’s a much cheaper way to produce hydrogen: spray steam on white-hot coals and out comes mostly hydrogen gas (40 percent) and carbon monoxide (50 percent), a mixture known appropriately as “water gas.” It’s the least expensive way to make hydrogen. Unfortunately, the carbon monoxide produced along with it is highly poisonous. To extract the last bit of energy, the carbon monoxide can be burned, and that turns it into the greenhouse gas carbon dioxide.
-
Electric cars powered by hydrogen fuel cells don’t produce greenhouse-enhancing carbon dioxide. But producing hydrogen does-and if we want to reduce our petroleum dependence, we’re going to have to reconcile ourselves to that fact.
« First
‹ Previous
101 - 111 of 111
Showing 20▼ items per page