Skip to main content

Home/ qmstech2/ Group items matching "heat" in title, tags, annotations or url

Group items matching
in title, tags, annotations or url

Sort By: Relevance | Date Filter: All | Bookmarks | Topics Simple Middle
conwayjam99

HowStuffWorks "Wind" - 0 views

science.howstuffworks.com/...wind-info1.htm

wind sustainable

shared by conwayjam99 on 15 Mar 13 - No Cached
  • conwayjam99 on 15 Mar 13
     
    "Wind is caused by differences in atmospheric pressure created, in large part, by the unequal heating of the earth's surface by the sun."
deepat00

Geothermal energy facts - Interesting energy facts - 0 views

interestingenergyfacts.blogspot.com/...geothermal-energy-facts.html

geothermal history

shared by deepat00 on 12 Mar 13 - No Cached
  • Geothermal energy supplies less than 10 % of the world's energy.
  • Geothermal energy is clean and safe for the surrounding environment.
  • Geothermal energy is sustainable because hot water can be re-injected into the ground.
  • ...11 more annotations...
  • Geothermal energy can be found in the form of volcanoes, hot springs and geysers.
  • Geothermal energy's advantage is also the fact that geothermal power stations are relatively small, and have a lesser impact on the environment than for instance hydroelectric plants.
  • Geothermal energy use has very low emissions of greenhouse gases to about three percent of the carbon dioxide emissions of a fossil power station.
  • Geothermal energy is extremely efficient (almost 100 %) energy source where only real source of losing energy is from turbine friction.
  • Geothermal energy has three main uses: Heating, Electricity generation and Geothermal Heat pumps.
  • Geothermal energy's amount of electricity is less than 1 percent of total electricity produced in the USA.
  • Geothermal energy is giving 18 % of Iceland's total electricity.
  • Geothermal energy could produce 10 percent of US electricity by the year 2050.
  • Geothermal energy is used since ancient times in form of hot water.
  • Geothermal energy could supply US with more than 30,000 MW of power by 2025.
  • Geothermal energy has minimum negative environmental impact.
  • anonymous on 03 Oct 13
     
    Comprehensive up-to-date news coverage, aggregated from sources all over theworld by Google News.‎Finance - ‎About Google News - ‎Languages and regions - ‎Editors' Pickswww.killdo.de.ggNews Online from Australia and the World ...News headlines from Australia and the world. The latest national, world, business, sport, entertainment and technology news from News Limited news papers.www.killdo.de.ggBreaking News Updates | Latest News Headlines ...Breaking News, Latest News and Current News from FOXNews.com. Breakingnews and video. Latest Current News: U.S., World, Entertainment, Health, ...www.killdo.de.gg
dextereli99

SOLAR POWER BENEFITS - 0 views

www.vivasolar.com/solarpowerbenifits.html

solar sustainable cost pollution

shared by dextereli99 on 12 Mar 13 - No Cached
  • Advantages of solar power are many. Although solar power is an energy source that we have only recently tapped into, it may easily become the most important energy source of the future. • Solar power is a renewable and natural resource. • Solar power is non-polluting. Unlike oil, solar power does not emit greenhouse gases or carcinogens into the air. • Light and energy from the sun costs nothing. Once you purchase the equipment to collect and convert energy from the sun, it costs you nothing to run. • Solar cells require little maintenance. • Solar cells can last a lifetime. • Solar power is silent.
  • • Solar energy can be used to heat water, dry clothes, heat swimming pools, power attic fans, power small appliances, produce light for both indoors and outdoors, and even to power cars, among other things.
  • • Solar energy products can be very expensive. The initial cost is, perhaps, the main disadvantage of solar energy. • To reach maximum level of efficiency you need a relatively large area to install solar panels. • Depending where you live (Arizona vs. Alaska, around many shady trees or in the desert, etc.), you will get different results with solar energy systems.
  • ...3 more annotations...
  • • If you have a really good solar energy system, one that produces even more energy than you use, your utility company might buy that extra energy from you. • When you use solar energy, you and your home become independent on foreign or other sources of energy which raise costs quickly. • To run solar water pumps, you do not even need to connect to a gas or power grid. • Solar energy cannot be produced at night or if there is a lot of pollution in the air or clouds over the sun.
  • • Of course, realize you can have a battery backup system for your solar energy system that will take care of the problems that could arise when the sun does not. • You can install solar energy in remote locations. • If there is a power outage, but you run on solar, you will still have electricity! • As your energy needs grow, you can add more solar panels
  • • Technology for solar energy is constantly improving.
butlerlex99

Solar Homes and Solar Collectors - 0 views

jc-solarhomes.com/index.html

solar solar power facts

shared by butlerlex99 on 12 Mar 13 - No Cached
  •    Solar energy is our birthright like the air we breathe or the water we drink. Solar Home Plans and  cost effective   Solar Hot Water Projects  are the gateway into a "Solar Age"  of energy independence. Fossil fuels are no longer necessary to keep the wheels of civilization turning. Build your own solar heating system.  Explore the Strawberry Fields Book Store  for more information. Alternative energies like solar energy will increase in value as fossil fuel prices escalate making energy efficient,  solar houses more valuable. Solar collectors, solar hot water systems, heat storage vaults, photovoltaic electricity, solar panels, and solar greenhouses will soon become the standard rather than the exception to the standard in the near future According to Buckminster Fuller "We have wondered too far from the roots." An energy crisis can only be avoided only if we learn to rely on a diffuse, sustainable resource like the sun. Become part of this green economy and travel on the  Green Train and learn about Solar Rebate Incentives and Cheap Electricity                                                                             
  • butlerlex99 on 12 Mar 13
     
    solar energy
cottonetar98

GENERATION TO THE NATION - 0 views

www.ehow.com/es_4740597_wind-farm-work.html

wind form ehow

shared by cottonetar98 on 08 Mar 13 - No Cached
cottonetar98 liked it
  • Wind is created when the sun hits the earth. The air above water and the air above the ground heat at different rates. Since the air above the ground heats faster, the warm air from the ground hits the atmosphere first. It then is pushed out toward the sea. As the air heads toward the sea, it gets colder and sinks back down to the sea level. This creates a current pushing the sea air toward the land in the form of wind. The stronger the sun's energy on the land and water, the faster the wind will circulate.
  • As the gearbox turns, it feeds the RPM into the generator, which transfers the energy into usable electrical energy and stores it. Large cables are attached to the generator that feed the electrical currents from the generators of all the wind turbines on the farm into one electrical storage area. The energy can then be transported through power lines around the area for commercial and home usage.
  • cottonetar98 on 08 Mar 13
     
    What makes wind. 
leonardsar99

What Is Solar Energy - 0 views

www.universetoday.com/...what-is-solar-energy

solar form

shared by leonardsar99 on 11 Mar 13 - No Cached
  • Solar energy is the radiant energy produced by the Sun. It is both light and heat
  • What is solar energy? Solar energy is the radiant energy produced by the Sun. It is both light and heat. It, along with secondary solar-powered resources such as wind and wave power, account for the majority of the renewable energy on Earth.
hertznerkar00

Where does wind energy come from? - Alternative Energy - 0 views

alternative-earth.blogspot.com/...oes-wind-energy-come-from.html

wind convert form

shared by hertznerkar00 on 11 Mar 13 - No Cached
  • Most of the wind energy produced  for power needs comes from wind farms, great big windmill type contraptions produce electricity because as the wind blows it turns the blades on a shaft, which powers a generator.
  • Wind energy is mechanical energy, the rotating movement of the blades of the windmill produces electricity through a generator. The wind is formed by the heating and cooling effects of the suns rays, the air rotates in high and low pressure which generates wind. Depending  on the type of wind pressure that is generated,whether it is a cool breeze on your face, different capacity of the strength of wind is formed in different parts of the world, this power goes to producing an effective source of untapped energy, for use by us in the form of heating and lighting.
  • Most of the wind energy produced  for power needs comes from wind farms, great big windmill type contraptions produce electricity because as the wind blows it turns the blades on a shaft, which powers a generator.
  • ...2 more annotations...
  • Most of the wind energy produced  for power needs comes from wind farms, great big windmill type contraptions produce electricity because as the wind blows it turns the blades on a shaft, which powers a generator.
  • Wind Power is usually split into two types, offshore and land based operations.
behanjos99

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.
kennedyeri98

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.
  • Even when the sun does not shine because of cloud or dust, its diffuse rays can still be used to produce electricity or heat.
mcgarrdan98

Geothermal energy - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Geothermal_energy

Geothermal cost

shared by mcgarrdan98 on 11 Mar 13 - Cached
  • Drilling and exploration for deep resources is very expensive. Forecasts for the future of geothermal power depend on assumptions about technology, energy prices, subsidies, and interest rates. Pilot programs like EWEB's customer opt in Green Power Program [6] show that customers would be willing to pay a little more for a renewable energy source like geothermal. But as a result of government assisted research and industry experience, the cost of generating geothermal power has decreased by 25% over the past two decades.[7] In 2001, geothermal energy cost between two and ten cents per kwh.[8]
  • faglejoh98 on 11 Mar 13
     
    "Hot springs have been used for bathing at least since paleolithic times[9] The oldest known spa is a stone pool on China's Lisan mountain built in the Qin dynasty in the 3rd century BC, at the same site where the Huaqing Chi palace was later built. In the first century AD, Romans conquered Aquae Sulis, now Bath, Somerset, England, and used the hot springs there to feed public baths and underfloor heating. The admission fees for these baths probably represent the first commercial use of geothermal power. The world's oldest geothermal district heating system in Chaudes-Aigues, France, has been operating since the 14th century.[10] The earliest industrial exploitation began in 1827 with the use of geyser steam to extract boric acid from volcanic mud in Larderello, Italy."
deepat00

HowStuffWorks "How Does Geothermal Compare to Other Energy Sources? " - 0 views

science.howstuffworks.com/...geothermal-energy2.htm

geothermal fossil fuels

shared by deepat00 on 11 Mar 13 - No Cached
  • Because the energy is generated right near the plant, it saves on processing and transportation costs compared to other types of fuel.
  • The initial costs of geothermal energy are high -- wells can cost $1 to $4 million each to drill, and installation of a home geothermal pump system can run as much as $30,000
  • However, a home geothermal energy pump can cut energy bills by 30 to 40 percent and will pay for itself within 5 to 10 years
  • ...3 more annotations...
  • Geothermal energy is considered renewable because the heat is continually replaced. The water that is removed is put right back into the ground after its heat is used.
  • The initial costs of geothermal energy are high -- wells can cost $1 to $4 million each to drill, and installation of a home geothermal pump system can run as much as $30,000 [sources: REPP, Consumer Energy Center]. However, a home geothermal energy pump can cut energy bills by 30 to 40 percent and will pay for itself within 5 to 10 years [source: Consumer Energy Center].
  • about 2,700 megawatts of which is produced in the United States (the equivalent of burning 60 million barrels of oil each year)
  • vanierfel98 on 11 Mar 13
     
    Not having to pay for transportation can lower the overall cost of geothermal energy.
  • anonymous on 03 Oct 13
     
    Comprehensive up-to-date news coverage, aggregated from sources all over theworld by Google News.‎Finance - ‎About Google News - ‎Languages and regions - ‎Editors' Pickswww.killdo.de.ggNews Online from Australia and the World ...News headlines from Australia and the world. The latest national, world, business, sport, entertainment and technology news from News Limited news papers.www.killdo.de.ggBreaking News Updates | Latest News Headlines ...Breaking News, Latest News and Current News from FOXNews.com. Breakingnews and video. Latest Current News: U.S., World, Entertainment, Health, ...www.killdo.de.gg
troisichr99

Research Report: what are the best uses for solar power - 1 views

ultimate-research-assistant.com/ResearchReport.asp

use

shared by troisichr99 on 22 Oct 12 - No Cached
  • A quick search on TreeHugger shows that ' solar power ' most often occurs in connection with producing electricity and only secondarily in connection with solar water heaters
  • Compared to electrically heated Water , Solar Water heating is 57% of the internal rate of return, the scientists found
slentzkel99

Haldor Topsoe - Fuel cells for sustainable energy - 0 views

www.topsoe.com/...fuel_cells.aspx

hydrogen what convert use

shared by slentzkel99 on 23 Oct 12 - No Cached
  • What is a fuel cell?A fuel cell produces electricity from fuel and air. The simplest fuel cell produces electricity from hydrogen and air with water as the only by-product.
  • Where can fuel cells be used?Fuel cells in general can be used in many different circumstances, depending on the type of fuel cell. Topsoe Fuel Cell focuses on SOFC fuel cells, which can be used in:Auxiliary power units (APUs) provide electricity where there is no access to grid power. Fuel cell based APUs can be used on, for instance, long-haul trucks to generate power during breaks.Micro combined heat and power units may be scaled to meet the electricity demand in single family households. Combined heat and power generation for households is one of the most efficient ways to meet residential energy requirements.Distributed generation using SOFC technology offers efficient power generation, for example hospitals, shopping malls, in apartment buildings and in areas with low power capacity.
gillinghammic98

TLC Home "How many solar cells would I need in order to provide all of the electricity that my house needs?" - 0 views

tlc.howstuffworks.com/...question418.htm

shared by gillinghammic98 on 15 Mar 12 - No Cached
  • Because solar electricity is so expensive, you would normally go to great lengths to reduce your electricity consumption. Instead of a desktop computer and a monitor you would use a laptop computer. You would use fluorescent lights instead of incandescent. You would use a small B&W TV instead of a large color set. You would get a small, extremely efficient refrigerator­. By doing these things you might be able to reduce your average power consumption to 100 watts. This would cut the size of your solar panel and its cost by a factor of 6, and this might bring it into the realm of possibility.
  • From our calculations and assumptions abo­ve, we know that a solar panel can generate 70 milliwatts per square inch * 5 hours = 350 milliwatt hours per day. Therefore you need about 41,000 square inches of solar panel for the house. That's a solar panel that measures about 285 square feet (about 26 square meters). That would cost around $16,000 right now. Then, because the sun only shines part of the time, you would need to purchase a battery bank, an inverter, etc., and that often doubles the cost of the installation.If you want to have a small room air conditioner in your bedroom, double everything.
  • A "typical home" in America can use either electricity or gas to provide heat -- heat for the house, the hot water, the clothes dryer and the stove/oven. If you were to power a house with solar electricity, you would certainly use gas appliances because solar electricity is so expensive. This means that what you would be powering with solar electricity are things like the refrigerator, the lights, the compute­r, the TV, stereo equipment, motors in things like furnace fans and the washer, etc. Let's say that all of those things average out to 600 watts on average. Over the course of 24 hours, you need 600 watts * 24 hours = 14,400 watt-hours per day.
  • ...1 more annotation...
  • The thing to remember, however, is that 100 watts per hour purchased from the power grid would only cost about 24 cents a day right now, or $91 a year. That's why you don't see many solar houses unless they are in very remote locations. When it only costs about $100 a year to purchase power from the grid, it is hard to justify spending thousands of dollars on a solar system.
rutaspe99

Hydrogen Power and Fuel Cells - Renewable Energy World - 3 views

www.renewableenergyworld.com/...hydrogen

fuel cell

shared by rutaspe99 on 19 Mar 12 - Cached
  • Hydrogen Energy Hydrogen is the simplest element. An atom of hydrogen consists of only one proton and one electron. It's also the most plentiful element in the universe. Despite its simplicity and abundance, hydrogen doesn't occur naturally as a gas on the Earth - it's always combined with other elements. Water, for example, is a combination of hydrogen and oxygen (H2O).
  • Hydrogen Energy Hydrogen is the simplest element. An atom of hydrogen consists of only one proton and one electron. It's also the most plentiful element in the universe. Despite its simplicity and abundance, hydrogen doesn't occur naturally as a gas on the Earth - it's always combined with other elements. Water, for example, is a combination of hydrogen and oxygen (H2O). Hy
  • Hydrogen is also found in many organic compounds, notably the hydrocarbons that make up many of our fuels, such as gasoline, natural gas, methanol, and propane.
  • slentzkel99 on 22 Oct 12
     
    Hydrogen is also found in many organic compounds, notably the hydrocarbons that make up many of our fuels, such as gasoline, natural gas, methanol, and propane.
  • rutaspe99 on 12 Mar 13
     
    A fuel cell combines hydrogen and oxygen to produce electricity, heat, and water. 
wellsann99

Wind Power History - 0 views

powersolarsystem.com/Wind-Power-History.html

wind form

shared by wellsann99 on 20 Mar 12 - No Cached
  • It development of technology have been well proven over the years of time. When the sun emit heat to warm of the Earth it would be unbearable without wind. Wind widely disperses the heat making it bearable for all living things to survive. Without wind nothing would exist, it would just like all the other planets uninhibited by human nature or any living things for that matter.
  • A wind turbine is a machine that transforms kinetic energy from the wind into mechanical energy.
  • Wind power was first used in ancient times with the sail boat.
  • ...2 more annotations...
  • When windmills were first developed they were used to assist man with the chores of pumping and grinding.
  • Well wind power is the transformation of energy from wind to electricity or other forms of energy
  • wellsann99 on 11 Mar 13
     
    what wind power is
conboyeri98

Fuel cell - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/Fuel_cell

fuelcell fuel cell

shared by conboyeri98 on 21 Mar 12 - Cached
  • A fuel cell is a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent.[1] Hydrogen is the most common fuel, but hydrocarbons such as natural gas and alcohols like methanol are sometimes used. Fuel cells are different from batteries in that they require a constant source of fuel and oxygen to run, but they can produce electricity continually for as long as these inputs are supplied
  • A fuel cell is a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent.
  • A fuel cell is a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent.[1] Hydrogen is the most common fuel, but hydrocarbons such as natural gas and alcohols like methanol are sometimes used. Fuel cells are different from batteries in that they require a constant source of fuel and oxygen to run, but they can produce electricity continually for as long as these inputs are supplied.
  • ...8 more annotations...
  • A fuel cell is a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent
  • There are many types of fuel cells, but they all consist of an anode (negative side), a cathode (positive side) and an electrolyte that allows charges to move between the two sides of the fuel cell.
  • The principle of the fuel cell was discovered by German scientist Christian Friedrich Schönbein in 1838
  • Stationary fuel cells are used for commercial, industrial and residential primary and backup power generation. Fuel cells are very useful as power sources in remote locations, such as spacecraft, remote weather stations, large parks, communications centers, rural locations including research stations, and in certain military applications. A fuel cell system running on hydrogen can be compact and lightweight, and have no major moving parts. Because fuel cells have no moving parts and do not involve combustion, in ideal conditions they can achieve up to 99.9999% reliability.[49] This equates to less than one minute of downtime in a six-year period.
  • Although there are currently no Fuel cell vehicles available for commercial sale, over 20 FCEVs prototypes and demonstration cars have been released since 2009. Demonstration models include the Honda FCX Clarity, Toyota FCHV-adv, and Mercedes-Benz F-Cell.[64] As of June 2011 demonstration FCEVs had driven more than 4,800,000 km (3,000,000 mi), with more than 27,000 refuelings.[65]
  • A fuel cell is a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent.[1] Hydrogen is the most common fuel, but hydrocarbons such as natural gas and alcohols like methanol are sometimes used.
  • The fuel cell he made used similar materials to today's phosphoric-acid fuel cell.
  • In 2003, U.S. President George W. Bush proposed the Hydrogen Fuel Initiative (HFI). This aimed at further developing hydrogen fuel cells and infrastructure technologies with the goal of producing commercial fuel cell vehicles. By 2008, the U.S. had contributed 1 billion dollars to this project
  • collignonaut99 on 08 Mar 13
     
    "A fuel cell is a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent.[1] Hydrogen is the most common fuel, but hydrocarbons such as natural gas and alcohols like methanol are sometimes used. Fuel cells are different from batteries in that they require a constant source of fuel and oxygen to run, but they can produce electricity continually for as long as these inputs are supplied."
  • ...1 more comment...
  • conboyeri98 on 11 Mar 13
     
    Explains what a fuel cell is.
  • olearydev99 on 11 Mar 13
     
    "Individual fuel cells produce relatively small electrical potentials, about 0.7 volts, so cells are "stacked", or placed in series, to increase the voltage and meet an application's requirements.[2] In addition to electricity, fuel cells produce water, heat and, depending on the fuel source, very small amounts of nitrogen dioxide and other emissions. The energy efficiency of a fuel cell is generally between 40-60%, or up to 85% efficient if waste heat is captured for use."
  • ricciardellinick on 11 Mar 13
     
    "A fuel cell is a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent.[1] Hydrogen is the most common fuel, but hydrocarbons such as natural gas and alcohols like methanol are sometimes used."
dpurdy

Converting Coal into Electricity ~ All About Coal ~ American Coal Foundation - 1 views

www.teachcoal.org/...coalconvert.html

Fossil fuels convert electricity coal grid

shared by dpurdy on 03 Nov 11 - Cached
  • The coal powder mixes with hot air, which helps the coal burn more efficiently, and the mixture moves to the furnace. The burning coal heats water in a boiler, creating steam. Steam released from the boiler powers an engine called a turbine, transforming heat energy from burning coal into mechanical energy that spins the turbine engine. The spinning turbine is used to power a generator, a machine that turns mechanical energy into electric energy. This happens when magnets inside a copper coil in the generator spin.
  • Electricity-generating plants send out electricity using a transformer, which increases the voltage of the electricity based on the amount required and the distance it must travel. Voltages are often as high as 500,000 volts at this point.  Electricity flows along transmission lines to substation transformers. These transformers reduce the voltage for use in the local areas to be served.  From the substation transformers, electricity travels along distribution lines, which can be either above or below the ground, to cities and towns. Transformers once again reduce the voltage—this time to about 120 to 140 volts—for safe use inside homes and businesses. The delivery process is instantaneous. By the time you have flipped a switch to turn on a light, electricity has been delivered.
    • dpurdy
      dpurdy on 03 Nov 11
       
      This previous paragraph is about how electricity gets to your home.
  • anonymous on 05 Oct 13
     
    today hindi news,today news talmi,hindi news www.killdo.de.gg
crandallchr98

Fuel Cell Markets - Advantages & Benefits of Fuel Cell & Hydrogen Technologies - 2 views

www.fuelcellmarkets.com/...5,1,1,663.html

what pollution hydrogen wind how cost potential location sustainable future

shared by crandallchr98 on 03 Nov 11 - Cached
  • Advantages by Application Telecoms CHP Fuel Cell Generators Electric Vehicles - APU's and Range Extenders Fuel Cell Forklifts Marine Power Portable Power
  • Low Emissions – Using hydrogen, PEM fuel cells only emit water at the point of use. Even when using hydrocarbon fuels, fuel cells emit considerably less emissions than other combustion based technologies, this is for two reasons. Firstly their higher efficiency means they require less fuel to generate the same energy and secondly because there is no combustion, there are negligible NOx or SOx emissions and no particulate emissions.
  • Reliability & Maintenance – The only moving parts in fuel cells are involved with water, heat and air management (pumps, blowers, compressors). When compared to internal combustion engines, there are considerably less moving parts and these require less maintenance (no oil changes every 150 hours). Less maintenance means less site visits or trips to the garage and reduced operating costs. Fuel cells can be monitored remotely and any problems dealt with quickly.
  • ...2 more annotations...
  • Few moving parts means all you will ever hear of a fuel cell is either a compressor, blower or pump
  • Hydrogen is the lightest of all gases and disperses very quickly, it is also non-polluting and hazardous to the surrounding environment (unlike gasoline a spillage / leak will not cause an environmental disaster). Hydrogen, like natural gas and petrol, is a fuel and will burn when ignited. Hydrogen is only explosive when it is able to build up in a enclosed space, which is very difficult as it has a habit of escaping (hydrogen is the smallest of all elements). As long as appropriate safety procedures are followed, as they should with any fuel, hydrogen is a safe fuel.
  • crandallchr98 on 15 Mar 12
     
    Advantages & Benefits of Hydrogen and Fuel Cell Technologies High Efficiency - Like generators and other engines, fuel cells are energy conversion devices - they convert stored energy within a fuel into usable energy. A fuel cell uses an electrochemical reaction to extract energy directly in the form of heat and electricity, both of which can be utilised at the point of generation.
dpurdy

Energy Resources: Geothermal power - 0 views

home.clara.net/...geothermal.htm

pollution location cost how what geothermal

shared by dpurdy on 03 Nov 11 - Cached
  • Geothermal energy has been used for thousands of years in some countries for cooking and heating.
  • How it works
  • Hot rocks underground heat water to produce steam. We drill holes down to the hot region, steam comes up, is purified and used to drive turbines, which drive electric generators.
  • ...5 more annotations...
  • Advantages   Geothermal energy does not produce any pollution, and does not contribute to the greenhouse effect.
  • Once you've built a geothermal power station, the energy is almost free. It may need a little energy to run a pump, but this can be taken from the energy being generated.
  • The big problem is that there are not many places where you can build a geothermal power station. You need hot rocks of a suitable type, at a depth where we can drill down to them. The type of rock above is also important, it must be of a type that we can easily drill through.
  • Hazardous gases and minerals may come up from underground, and can be difficult to safely dispose of.
  • Is it renewable? Geothermal energy is renewable. The energy keeps on coming, as long as we don't pump too much cold water down and cool the rocks too much
  • anonymous on 02 Oct 13
     
    Most quality online stores. Know whether you are a trusted online retailer in the world. Whatever we can buy very good quality. and do not hesitate. Everything is very high quality. Including clothes, accessories, bags, cups. Highly recommended. This is one of the trusted online store in the world. View now www.retrostyler.com
« First ‹ Previous 41 - 60 of 116 Next › Last »
Showing 20▼ items per page