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brownale99

How is geothermal energy better than fossil fuels - 1 views

wiki.answers.com/...nergy_better_than_fossil_fuels

geothermal sustainable

shared by brownale99 on 12 Mar 13 - No Cached
  • brownale99 on 12 Mar 13
     
    "Geo thermal systems heat and cool your house cheaper and better than fossil fuels will with gas going up pretty soon you would not be able to afford it. It might be costly to put one in your house initially but it will pay itself off in 3-5 years. Also there is a company called ECONAR that builds a heat pump that will cool, heat, and do 50 to 100% of your hot water heat. Fossil fuels also produce carbon dioxide when burnt, adding to the greenhouse gases and contributing to climate change."
bakereli00

Global Warming and Climate Change | Greenpeace - 0 views

www.greenpeace.org/...global-warming-and-energy

geothermal solar wind history global warming climate change greenpeace

shared by bakereli00 on 08 Mar 13 - No Cached
  • Research has shown that with current technology, renewable energy sources like wind, solar, and geo-thermal can provide almost all of our primary energy demand.
  • brownale99 on 08 Mar 13
     
    "The Solutions With current technology, renewable energy sources like wind, solar, and geothermal can provide 96% of our electricity and 98% of our total heating demand - accounting for almost all of our primary energy demand."
aaronschr00

Where does Wind Energy Come From? - 1 views

www.motiva.fi/...index.htm

wind history

shared by aaronschr00 on 08 Mar 13 - No Cached
  • All renewable energy (except tidal and geothermal power), and even the energy in fossil fuels, ultimately comes from the sun. The sun radiates 174,423,000,000,000 kilowatt hours of energy to the earth per hour.
  • The sun radiates 174,423,000,000,000 kilowatt hours of energy to the earth per hour.
  • freeberntay99 on 08 Mar 13
     
    " Where does Wind Energy come From? All renewable energy (except tidal and geothermal power), and even the energy in fossil fuels, ultimately comes from the sun. The sun radiates 174,423,000,000,000 kilowatt hours of energy to the earth per hour. In other words, the earth receives 1.74 x 10 17 watts of power . 1) About 1 to 2 per cent of the energy coming from the sun is converted into wind energy. That is about 50 to 100 times more than the energy converted into biomass by all plants on earth. 2)"
sokolkyl00

Sustainable energy - Wikipedia, the free encyclopedia - 1 views

en.wikipedia.org/...Sustainable_energy

shared by sokolkyl00 on 22 Oct 12 - Cached
  • Sustainable energy is the sustainable provision of energy that meets the needs of the present without compromising the ability of future generations to meet their needs.
  • Sustainable energy is the sustainable provision of energy that meets the needs of the present without compromising the ability of future generations to meet their needs.
  • Sustainable energy is the sustainable provision of energy that meets the needs of the present without compromising the ability of future generations to meet their needs. Technologies that promote sustainable energy include renewable energy sources, such as hydroelectricity, solar energy, wind energy, wave power, geothermal energy, and tidal power, and also technologies designed to improve energy efficiency.
  • ...1 more annotation...
  • At this rate, many experts believe that solar energy is not efficient enough to be economically sustainable given the cost to produce the panels themselves.
dpurdy

Hydrogen fuel - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Hydrogen_fuel

hydrogen fuel form

shared by dpurdy on 24 Oct 12 - No Cached
  • Because pure hydrogen does not occur naturally, it takes energy to manufacture it. There are different ways to manufacture it, such as, electrolysis and steam-methane reforming process.
  • In electrolysis, electricity is run through water to separate the hydrogen and oxygen atoms. This method can be used by using wind, solar, geothermal, hydro, fossil fuels, biomass, and many other resources.
  • The more natural methods of making electricity (wind, solar, hydro, geothermal, biomass), rather than fossil fuels, would be better used as to continue the environment-friendly process of the fuel. Obtaining hydrogen from this process is being studied as a viable way to produce it domestically at a low cost. Steam-methane reforming process extracts the hydrogen from methane. However, this reaction causes a side production of carbon dioxide and carbon monoxide which are greenhouse gases and contribute to global warming.
dpurdy

EIA Energy Kids - Energy Basics - 0 views

www.eia.gov/...energy.cfm

current

shared by dpurdy on 03 Nov 11 - No Cached
  • Energy Is the Ability To Do Work Energy comes in different forms: Heat (thermal) Light (radiant) Motion (kinetic) Electrical Chemical Nuclear energy Gravitational
  • Renewable Energy Renewable energy sources include: Solar energy from the sun, which can be turned into electricity and heat Wind Geothermal energy from heat inside the Earth Biomass from plants, which includes firewood from trees, ethanol from corn, and biodiesel from vegetable oil Hydropower from hydroturbines at a dam
deepat00

How Geothermal Energy Works - 0 views

www.conserve-energy-future.com/HowGeothermalEnergyWorks.php

fossil fuels geothermal convert

shared by deepat00 on 07 Oct 13 - No Cached
  • The amount with in the earth’s surface contains 50,000 times more energy than all the oil and natural gas resources in the world.
  • To get that heat, water is pumped down an “injection well”. Then it filters through the cracks in the rocks where they are at a high temperature. The water then returns via the “recovery well” under pressure in the form of steam. That steam is captured and is used to drive electric generators.
brownale99

How much more expensive is solar energy than fossil fuels - 0 views

wiki.answers.com/...solar_energy_than_fossil_fuels

geothermal cost

shared by brownale99 on 13 Mar 13 - No Cached
  • brownale99 on 13 Mar 13
     
    "Fossil fuel power stations typically cost about $2.1 dollars per watt to build solar stations around $7 at present. The efficiency is increasing and costs are falling. This of course does not represent the cost to the consumer. In addition it does not take into account all the various other costs and the advantages and disadvantages of each. Fuel (fossil stations), poor sunlight (solar stations). Maintenance costs are similar for single plants but solar stations do not have the capacity of fossil fuel stations."
hayespay99

How long have people been using solar energy - 1 views

wiki.answers.com/...people_been_using_solar_energy

solar history convert form energy

shared by hayespay99 on 12 Mar 13 - No Cached
  • It depends what you mean by "solar energy." Humans have always used solar energy in some sense: to warm themselves, to grow food, etc. However, I'm assuming that's not really what you mean (although it is important to realize that all energy on earth, with the exception of nuclear fission and geothermal, is ultimately driven by the sun's energy -- even fossil fuels, which after all were plants that grew with sunlight millions of years ago). Solar power has been used directly in various forms for over 100 years.
dpurdy

First Tidal Power in U.S. Starts Flowing to the Grid - IEEE Spectrum - 0 views

spectrum.ieee.org/...wer-starts-flowing-to-the-grid

tide current

shared by dpurdy on 19 Mar 13 - No Cached
  • An offshore turbine is finally spinning in the United States!
  • Bay of Fundy, off the Maine coast. The TidGen has a peak power output of 180 kilowatts, enough to power around 25 to 30 homes
  • dpurdy on 19 Mar 13
     
    The ONLY tidal power plant connected to the grid in the US is online.
sopranodan99

Wave & Tidal Energy Technology | Renewable Northwest Project - 0 views

www.rnp.org/...wave-tidal-energy-technology

wave current

shared by sopranodan99 on 22 Oct 12 - No Cached
  • Potential
  • Wave energy resources are best between 30º and 60º latitude in both hemispheres, and the potential tends to be the greatest on western coasts
  • While no commercial wave or tidal projects have yet been developed in the United States, several projects are planned for the near future, including projects in the Northwest
  • ...7 more annotations...
  • ‘Pelamis’ wave energy conversion devices and generates a combined 2.25 MW of electricity. OPD plans to expand the facility to produce 22.5 MW in 2007
  • The United States receives 2,100 terawatt-hours of incident wave energy along its coastlines each year, and tapping just one quarter of this potential could produce as much energy as the entire U.S. hydropower system.
  • Total Annual U.S. Incident Wave Energy 2,110 terrawatt-hours
  • The United States receives 2,100 terawatt-hours of incident wave energy along its coastlines each year, and tapping just one quarter of this potential could produce as much energy as the entire U.S. hydropower system
  • In addition to its abundant solar, wind and geothermal resources, the Pacific Northwest is also uniquely situated to capture the renewable energy of the ocean. Special buoys, turbines, and other technologies can capture the power of waves and tides and convert it into clean, pollution-free electricity. Like other renewable resources, both wave and tidal energy are variable in nature. Waves are produced by winds blowing across the surface of the ocean. However, because waves travel across the ocean, their arrival time at the wave power facility may be more predictable than wind. In contrast, tidal energy, which is driven by the gravitational pull of the moon and sun, is predictable centuries in advance.
  • The United States receives 2,100 terawatt-hours of incident wave energy along its coastlines each year, and tapping just one quarter of this potential could produce as much energy as the entire U.S. hydropower system
  • The Unit
  • mchughkon99 on 15 Mar 13
     
    the amount of 1/4 of energy around the coasts could be equal to the amount energy produced by hydropower
giumarraant99

NREL: Hydrogen and Fuel Cells Research - Renewable Electrolysis - 0 views

www.nrel.gov/...renew_electrolysis.html

use renewable sustainable hydrogen

shared by giumarraant99 on 24 Oct 12 - No Cached
  • 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.
hertznerkar00

What is U.S. electricity generation by energy source? - FAQ - U.S. Energy Information Administration (EIA) - 1 views

www.eia.gov/...faq.cfm

wind current

shared by hertznerkar00 on 25 Sep 13 - No Cached
  • What is U.S. electricity generation by energy source? In 2012, the United States generated about 4,054 billion kilowatthours of electricity.  About 68% of the electricity generated was from fossil fuel (coal, natural gas, and petroleum), with 37% attributed from coal. Energy sources and percent share of  total electricity generation in 2012 were:  Coal 37% Natural Gas 30% Nuclear 19% Hydropower 7% Other Renewable 5% Biomass 1.42% Geothermal 0.41% Solar 0.11% Wind 3.46% Petroleum 1% Other Gases < 1%
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