Group items tagged to - qmstech2

A Quiet Breakthrough in Geothermal Energy - Businessweek - 1 views

www.businessweek.com/...akthrough-in-geothermal-energy

geothermal energy cost

shared by parkergar99 on 08 Mar 13 - No Cached

Geothermal power has massive potential in many areas of the U.S. but it has long remained a niche technology.
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vanierfel98 on 08 Mar 13

Talks about how much potential there is

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parkergar99 on 11 Mar 13

"While traditional geothermal can be cheaper than coal power, enhanced geothermal systems are generally more expensive than traditional ones. But being able to create multiple geothermal zones from one well brings down the overall cost of enhanced geothermal by 50 percent, Petty said."

<div class="cArrow"> </div><div class="cContentInner">"While traditional geothermal can be cheaper than coal power, enhanced geothermal systems are generally more expensive than traditional ones. But being able to create multiple geothermal zones from one well brings down the overall cost of enhanced geothermal by 50 percent, Petty said."</div>

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Sustainability - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Sustainability

Sustainability sustainable

shared by olearydev99 on 15 Mar 13 - Cached

olearydev99 on 15 Mar 13

"Sustainability is the capacity to endure"

<div class="cArrow"> </div><div class="cContentInner">"Sustainability is the capacity to endure"</div>

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Fuel Cells | Energy Sources | Chevron - 0 views

www.chevron.com/...fuelcells

form fuel cell

shared by conboyeri98 on 11 Mar 13 - No Cached

Fuel cells are self-contained power generation devices that are able to produce reliable electricity for residential, commercial, industrial and transportation applications. A fuel cell can convert hydrogen directly into electricity that can be used to power an electric car, for example, or a home.
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. Fuel cells convert energy efficiently, which helps conserve energy resources. And a byproduct of this electro-chemical process is pure water—a clear benefit for the environment
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In fuel cells, the use of hydrogen produces fewer greenhouse gases than does burning fossil fuels
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...1 more annotation...
However, hydrogen—a tasteless, odorless, colorless gas—is not found freely in nature. It must be extracted from other substances.
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Geothermal Energy | Energy and Global Climate Change in New England | US EP - 0 views

www.epa.gov/...re_geothermal.html

co2 geothermal

shared by behanjos99 on 11 Mar 13 - No Cached

The constant temperature of the Earth creates underground sources of heat, hot water and steam which become fuel to produce geothermal energy. People have used various forms of geothermal energy for hundreds of years; modern technology accesses these underground reservoirs, steam deposits and hot air by drilling, and then using the heat or hot water directly or using it to create power. Geothermal energy represents an enormous, underused power source that provides clean, renewable energy in virtually unlimited supply.
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Biofuels - What are They and Where Do They Come From? | Sustainable Energy Systemz - 0 views

sustainableenergysystemz.com/...2929

biofuel form

shared by schmettererdav00 on 11 Mar 13 - No Cached

Biofuels are made with biomass (biological material from living or recently living organisms) there are many kinds, for example biodiesel involves growing crops that contain large amounts of natural oil, these plants then go through a refining process and subsequently are mixed in with regular diesel to power cars. Bio petrol is made in a similar way; plants are refined to make a natural ethanol.
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STEP - Heating houses by sunlight-How sustainable is solar power generally? - 0 views

www.stepin.org/casestudy.php

solar sustainable

shared by kennedyeri98 on 11 Mar 13 - No Cached

Solar energy does little to harm the environment.
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Even when the sun does not shine because of cloud or dust, its diffuse rays can still be used to produce electricity or heat.
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Tidal Power - 1 views

www.global-greenhouse-warming.com/tidal.html

tide form sustainable

shared by murphymat98 on 11 Mar 13 - No Cached

Tidal power is a means of electricity generation achieved by capturing the energy contained in moving water mass due to tides. Two types of energy can be extracted: kinetic energy of currents between ebbing and surging, and potential energy from the difference in height (or head) between high and low water marks.
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Tidal power schemes do not produce energy 24 hours a day. A conventional design, in any mode of operation, would produce power for 6 to 12 hours in every 24 and will not produce power at other times
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Wind Power - What is Wind Power and How Does It Work? - 0 views

environment.about.com/...wind_power.htm

wind form

shared by wellsann99 on 11 Mar 13 - Cached

wind power as a better way to generate electricity than plants fueled by coal, hydro (water) or nuclear power.
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willisjos98 on 11 Mar 13

"Wind power is actually a form of solar power, because wind is caused by heat from the sun. Solar radiation heats every part of the Earth's surface, but not evenly or at the same speed. Different surfaces-sand, water, stone and various types of soil-absorb, retain, reflect and release heat at different rates, and the Earth generally gets warmer during daylight hours and cooler at night. As a result, the air above the Earth's surface also warms and cools at different rates. Hot air rises, reducing the atmospheric pressure near the Earth's surface, which draws in cooler air to replace it. That movement of air is what we call wind."

<div class="cArrow"> </div><div class="cContentInner">"Wind power is actually a form of solar power, because wind is caused by heat from the sun. Solar radiation heats every part of the Earth's surface, but not evenly or at the same speed. Different surfaces-sand, water, stone and various types of soil-absorb, retain, reflect and release heat at different rates, and the Earth generally gets warmer during daylight hours and cooler at night. As a result, the air above the Earth's surface also warms and cools at different rates. Hot air rises, reducing the atmospheric pressure near the Earth's surface, which draws in cooler air to replace it. That movement of air is what we call wind."</div>

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wellsann99 on 11 Mar 13

what is wind power

<div class="cArrow"> </div><div class="cContentInner">what is wind power</div>

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Tidal power - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Tidal_energy

tide sustainable

shared by warneraus98 on 11 Mar 13 - Cached

mcdermottaar99 liked it

idal power is taken from the Earth's oceanic tides; tidal forces are periodic variations in gravitational attraction exerted by celestial bodies. These forces create corresponding motions or currents in the world's oceans
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Because the Earth's tides are ultimately due to gravitational interaction with the Moon and Sun and the Earth's rotation, tidal power is practically inexhaustible and classified as a renewable energy resource
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Because the Earth's tides are ultimately due to gravitational interaction with the Moon and Sun and the Earth's rotation, tidal power is practically inexhaustible and classified as a renewable energy resource
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warneraus98 on 11 Mar 13

ware tide energy comes from

<div class="cArrow"> </div><div class="cContentInner">ware tide energy comes from </div>

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Tidal Power - Generating electricity from tidal currents - 1 views

www.alternative-energy-news.info/...tidal-power

tide energy

shared by rascoekat00 on 11 Mar 13 - No Cached

Tidal energy is produced through the use of tidal energy generators. These large underwater turbines are placed in areas with high tidal movements, and are designed to capture the kinetic motion of the ebbing and surging of ocean tides in order to produce electricity. Tidal power has great potential for future power and electricity generation because of the massive size of the oceans. These articles explore the potential energy of tidal power technologies.
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We can use slow moving ocean and river waves for a new, reliable and affordable alternative energy source. A University of Michigan engineer has developed a device that acts like a fish that turns the potentially destructive vibrations in water into clean, renewable energy.
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It will generate one of the most environmentally-friendly forms of energy - it makes no noise
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"But if we could harness 0.1 percent of the energy in the ocean, we could support the energy needs of 15 billion people
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Tidal energy is produced through the use of tidal energy generators. These large underwater turbines are placed in areas with high tidal movements
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Xin Wang on 11 Mar 13

This is how tidal energy is converted into useful form of power.

<div class="cArrow"> </div><div class="cContentInner">This is how tidal energy is converted into useful form of power. </div>

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How does tidal energy generate electricity - 0 views

wiki.answers.com/...al_energy_generate_electricity

convert

shared by adamsaub98 on 11 Mar 13 - No Cached

Tidal BarragesA tidal barrage is basically a huge dam that is built across a river or estuary. Tunnels are built throughout the dam, and when the tide rises and falls it turns a turbine that generates power. Tidal FencesTidal fences are giant turnstiles that have vertical axis turbines mounted on a fence. The water passes through the fence and powers the turbines. Tidal TurbinesTidal turbines are the latest water power technology used in tidal areas. They look like wind turbines that are lined together underwater. They are used to capture strong tidal flows, so they have to be built extra strong.
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What are the advantages and disadvantages of wind power - 0 views

wiki.answers.com/...nd_disadvantages_of_wind_power

wind

shared by conwayjam99 on 13 Mar 13 - No Cached

conwayjam99 on 13 Mar 13

"Wind power will become cheaper than fossil fuel in the next few years (when the price of carbon is added to coal and oil), and in many places already is."

<div class="cArrow"> </div><div class="cContentInner">"Wind power will become cheaper than fossil fuel in the next few years (when the price of carbon is added to coal and oil), and in many places already is."</div>

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Wind - 0 views

www.esru.strath.ac.uk/...wind.htm

shared by stewartlas97 on 13 Mar 13 - No Cached

stewartlas97 on 13 Mar 13

"This movement is complicated by several other factors that means wind does not always flow from the equator in the direction of either pole. The rotation of the earth creates a force known as the Coriolis force and this factor along with the temperature differences create winds at high altitudes above the earth on a large scale. These Geostrophic winds play a part in the wind's that affect us in everyday life, but local winds are largely affected by the surface of the earth - which is neither uniform or smooth. The earth has large flat plains (desert regions), areas covered with plant life (rainforests), very uneven regions (mountain ranges) and very smooth regions (seas and oceans), all of which affect the wind near the surface of the earth to varying degrees. These areas of the earth all have different values of roughness, which can impeded the flow of air. Obviously the lower the value of roughness the less the air is impeded."

<div class="cArrow"> </div><div class="cContentInner">"This movement is complicated by several other factors that means wind does not always flow from the equator in the direction of either pole. The rotation of the earth creates a force known as the Coriolis force and this factor along with the temperature differences create winds at high altitudes above the earth on a large scale. These Geostrophic winds play a part in the wind's that affect us in everyday life, but local winds are largely affected by the surface of the earth - which is neither uniform or smooth. The earth has large flat plains (desert regions), areas covered with plant life (rainforests), very uneven regions (mountain ranges) and very smooth regions (seas and oceans), all of which affect the wind near the surface of the earth to varying degrees. These areas of the earth all have different values of roughness, which can impeded the flow of air. Obviously the lower the value of roughness the less the air is impeded."</div>

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Wind turbine - Wikipedia, the free encyclopedia - 1 views

en.wikipedia.org/...Wind_turbine

wind convert history first

shared by dpurdy on 21 Mar 13 - Cached

A wind turbine
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converts kinetic energy from the wind
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into mechanical energy
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...1 more annotation...
The first electricity-generating wind turbine was a battery charging machine installed in July 1887 by Scottish academic James Blyth to light his holiday home in Marykirk, Scotland.
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Geothermal Basics Current Use - 1 views

geo-energy.org/currentUse.aspx

geothermal

shared by dittrichcai99 on 18 Mar 13 - No Cached

dittrichcai99 on 18 Mar 13

"The geothermal power production in the U.S. today provides enough electricity to meet the electricity needs of about 2.4 million California households. (1) This does not include contributions from geothermal heat pumps and direct heating uses."

<div class="cArrow"> </div><div class="cContentInner">"The geothermal power production in the U.S. today provides enough electricity to meet the electricity needs of about 2.4 million California households. (1) This does not include contributions from geothermal heat pumps and direct heating uses."</div>

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How Do PV Solar Panels Work - Solar - 0 views

www.reuk.co.uk/ow-Do-PV-Solar-Panels-Work.htm

convert

shared by coreyemi99 on 20 Mar 13 - No Cached

When a visible light photon strikes a solar cell it can do one of three things: pass straight through, be reflected, or be absorbed. If the photon is absorbed, its energy is absorbed by an electron in an atom of the solar cell enabling it to escape from its normal position (photon excitation), cross the junction and fill a hole. Since electrons are physically moving across the PN junction, the positive charge carrying holes are effectively moving in the opposite direction around the load circuit (a rechargeable battery or light bulb etc). This completes the circuit providing more holes for the electrons to combine with and providing usable electricity.
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Nuclear Industry Withers in U.S. as Wind Pummels Prices - Bloomberg - 0 views

www.bloomberg.com/...ind-pummels-prices-energy.html

wind cost

shared by dpurdy on 24 Mar 13 - No Cached

The wind power boom has benefited consumers in regions where wind development is fastest, contributing to a 40 percent wholesale power-price plunge since 2008
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U.S. wind installations have risen 10-fold since 2003 to 60,007 megawatts,
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Climate: Facts, dangers and what you can do | Environmental Defense Fund - 0 views

www.edf.org/...ts-dangers-and-what-you-can-do

climate

shared by olearydev99 on 26 Mar 13 - No Cached

olearydev99 on 26 Mar 13

"Scientists track changes to the planet's temperature in many ways. Land-based weather stations and ocean buoys in every corner of the world monitor temperatures constantly."

<div class="cArrow"> </div><div class="cContentInner">"Scientists track changes to the planet's temperature in many ways. Land-based weather stations and ocean buoys in every corner of the world monitor temperatures constantly."</div>

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Why a hydrogen economy doesn't make sense - 0 views

phys.org/news85074285.html

fuel cell form