Archive for the 'Articles' Category

The Future of Wind Power

(April 16, 2008) Christina Archer, consulting assistant professor of Civil and Environmental Engineering at Stanford University, discusses the importance of win power in a clean and renewable future. The Energy Seminar meets weekly during the academic year. For a list of upcoming talks, visit the events page at the Woods Institute for the Environment website. Stanford University www.stanford.edu Woods Institute for the Environment at Stanford: woods.stanford.edu Christina Archer www.stanford.edu Stanford University Channel on YouTube: www.youtube.com

Photovoltaic Cells – Astounding Technological Breakthrough For Energy Collection And Storage

Photovoltaic cells, an array of black squares that consist of a solar panel is getting progressively more efficient, while at the same time, less expensive. All thanks to the evolution of designs that allow them to increase the concentration of gathered sunlight at a point. Along with price, even the cell size is decreasing, making it not only cheaper to produce but also, at the same time, more productive. Today it costs around $4.00 to produce per watt hour of solar generated energy, while it cost nearly double that amount around 17 years ago.

Solar powered electricity gives out zero emission and is certainly safe for the atmosphere and environment as it uses only the sun as its driving force. Owing to rapid development it is now becoming a practical option to place solar panels on the roof tops and is even being used to heat peoples homes, produce electricity and heat water with considerable ease. For water heating, the photovoltaic cell works by encasing the water in the cells from where, on heating, pipes distribute it to various locations.

The ability of Photovoltaic cells to collect sufficient sun radiations even on stormy or cloudy days is increasing. One company, Uni-Solar has particularly developed an array of solar collection cells for use at home that, with a system of advanced technology, is able to store more energy at a time on sunlit days than other arrays and hence gives energy even on inclement days.

The PV system is, actually, one more solar power system that is available in the market today. The PV system, on connection to an electrical grid, can transfer to it any excess solar energy collected at a particular residence, thereby allowing other residences to share this. This also lowers the grids dependence on hydroelectricity for electricity production. A few advantages among others, of adopting the PV system is that it keeps costs down as opposed to a full-fledged solar panel, while it simultaneously reduces pollution as well as pressure on the grid system. Certain towns and suburban communities are adopting the centralized solar collection arrays.

Even some big corporations are seriously considering the use of solar power (clearly indicating that solar energy, as an economically viable alternative, has arrived). While Google is installing a 1.6-megawatt plant for solar power generation, at the top of their corporate headquarters, wall mart have made it clear that they want to put in a 100-megawatt system.

Government subsidies are being provided by nations such as Germany, Japan, Switzerland and United States in the form of tax breaks to individuals and companies who use solar power for heat generation or power supply. It is predicted that the number of private investors who will see value in and want to invest in the ” green” technology will increase with advance in technology and increase in demand for storage of solar collection material.

5 Renewable Sources Of Unlimited Energy

The world relies heavily on natural resources like coal and gas. Coal is a form of biomass that has been compressed over millennia to produce a non-renewable fossil fuel. We use these fossil fuels for generating power, heating our homes and businesses, manufacturing of goods and transportation. We are very accustomed to the conveniences provided by modern technology and we are indeed very fortunate to live in this world. However, we must consider the fact that the natural resources making this possible will not last forever. We have to make a lifestyle change and look towards renewable energy resources to take care of our needs.

Renewable energy includes solar energy, wind power, hydro power, tidal power, geothermal energy, biomass and wave power. These are some of the resources which are available in abundance as they are naturally replenished.

1. Solar energy, obtained from the sun, is being used for industrial as well as domestic purposes. It can be used for cooking heating, cooling and ventilation, among other things. Most sources of renewable energy are directly or indirectly powered by the sun. The heat of the sun is dissipated around the globe in the form of winds and ocean currents.

2. Wind farms installed on large plain tracts of agricultural land utilize the air flows. The airflows can be used to run wind turbines to generate electricity which in turn can be used to power our homes and businesses. There is no pollution due to the operation of wind farms and thus it proves to be an eco-friendly way to produce this energy.

3. Hydo power can be obtained from the water bodies like oceans and rivers. Energy from flowing rivers can be captured to generate electricity. So also, mechanical energy from tides and ocean waves can be used to generate electricity. The thermal energy produced by oceans using the sun’s heat is another renewable source of energy.

4. Geothermal energy is energy obtained by harvesting the heat from the Earth’s core. This energy is obtained by building power stations at places where it is available closer to the Earth’s surface. Dry steam plants take steam out of fractures and fissures in the Earth’s crust and use it to drive a turbine that spins a generator to produce electricity.

5. Biomass is a solid material obtained from living organisms like plants and animals. Biofuels like ethanol and biogas obtained from biomass are being increasingly used in the transportation industry as an alternative fuel.

Renewable energy sources are generally sustainable as they cannot run out and their environmental impacts are generally not as harsh as those of fossil fuels. Although it is expensive to build huge plants to harness this energy, in the long run it may prove to be an eco-friendly way to use renewable energy. Biomass and geothermal energy will require wise management if they are to be used in a sustainable manner. All of the other renewable resources, are replenished quite easily by nature.

Is Renewable Energy Technology Really Available to Homeowners

With the rising energy costs and effects of global warming so prevalent today, many people are wondering if there is truth to the concept of renewable energy technology. There also appears to be confusion between alternative energy technology and renewable energy technology. Alternative energy encompasses all renewable energy sources, but includes things like nuclear power and energy from municipal waste. These are carbonaceous examples. Renewable energy technology focuses on energy that is replaced as it is being used, such as solar energy and wind energy.

With that clear, are there truly benefits on a home or small business level to renewable solar technology? Absolutely. Truthfully, by utilizing renewable energy technology on a home level you can save yourself thousands of dollars each year. Renewable energy technology has gained popularity in recent years and it has become increasingly easy to meet your home’s energy needs with just a little handyman work. With the information available about renewable energy technology, it is possible to build renewable energy products, such as a windmill or solar panel, on your own. Do-it-yourselfers are saving huge amounts of pocket change by building and installing these systems themselves. If you have the money to invest in a commercial professionally installed system, in general these are more efficient, however, savings can still be realized, and at a much faster rate, by researching and building your own renewable energy systems.

Renewable energy technology is advancing with each day. Solar electrical systems have advanced from giant roof panels to thin layers of film that are twice as conductive and work with less sunlight. There are now solar powered charges for cell phones, batteries and other small household items. Windmills have been made more aerodynamic for greater action and electricity generation. Renewable energy technology can even be seen along today’s highways as small solar/wind operation stations powering signs and lights.

Many homeowners today are looking into integrating green energy sources for developing more energy efficient homes and businesses. A green energy source is power generated through renewable resources, such as the sun, wind and water. The other benefit of green energy sources is their low contribution to global warming, pollution and other environmental issues.

The most popular of green energy sources is the sun. Energy captured from the sun is called solar energy. Of the green energy sources, solar energy is the most popular because it offers multiple options for use. It is possible to harness electrical energy from the sun using solar panels consisting of photovoltaic cells that convert energy from the sun into electricity you can use in your home or business. There are also solar hot water collectors that use the heat of the sun to produce hot water. These solar green energy sources are readily available and increasing in popularity as most homes and businesses can have them mounted on their roof and they can take advantage of lowered utility costs.

The most efficient of green energy sources is wind. Wind has been used to power water pumps for centuries, but has grown in popularity as a way to supplement home and business electricity needs. Wind is the safest and cleanest of the green energy sources as it produces no pollutants and does not contribute to global warming. Wind energy is harnessed by erecting a turbine that spins in the breeze generating electricity. Unlike the sun, which can be found almost anywhere, in order to utilize wind as a green energy source, you must live in an area where wind is readily available.

Water is also a viable participant of green energy sources. Water is less widely used as a green energy source for homes, as not all homes have an available stream to produce the needed electricity. The Amish have used water to power entire shops using conveyer belt systems, so it is an old practice, but it is still being used successfully today. As with solar and wind energy, energy harnessed from moving water is almost completely pollutant free and is generated from a renewable resource.

9 Green Tips on ‘how To’ Cut Your High Energy Bill

In this article we will cover some easy and simple things you can do to save energy and help reduce your monthly energy bill. Think Green!

Green Investments:
A good place to start is with your light bulbs. If you’re still using incandescent bulbs, you should switch to compact fluorescent light (CFL) bulbs or regular fluorescent bulbs. Many cities in the United States have an exchange program, where your city will replace your incandescent bulbs with CFL bulbs -at no cost.

Green Power Save gadget:
This handy gadget will help to monitor the supply of power to your home and regulate the usage. It will use the minimum needed to supply all your power needs.

Green Usage:
The first thing you need to do is become aware of the extra energy your using. When you go to another room, be sure to turn of the lights. Even if you are gone for only a few minutes, this will help to get yourself trained to continually turn off unneeded appliances.

Your Green Perception:
What do you perceive as an electronic appliance? Would you turn off a TV or a
radio, but not the reading lamp? These small and simple tasks will help in a huge
way to reduce your energy usage.

Green Appliance Usage:
If we start thinking green when it comes to using our major home appliances, we can eliminate the myth that the more gadgets we have, the higher our power bills will be. Some of the typical high energy usage appliances include:

Washer and Dryer- Try do laundry only when you have full loads, and if possible, try switching to a gas dryer.

Water Heater- Set the water heater to be on the minimum amount of time, and if possible, switch to a tankless water heater.

You might think that purchasing these new appliances defeats the purpose of saving money on your energy bill. However, you will find, most of the time, that you will get an energy credit on your taxes for making this purchase, and saving energy in the long term.

Heater & Air Conditioner- By setting these appliances to only the minimum amount required to be comfortable, you can greatly reduce the energy they use.

Computer- By turning off your computer monitor when you take a break can make a huge difference. It only takes a second to turn it back on… think of it as a light bulb.

You must stick to this energy saving lifestyle to reduce your energy bills and help save the world. We need to stop thinking about ourselves, and think of the next generations to come!

Make power at home with solar and wind energy to eliminate your power bill.
Get our complete guide at Earth4Energy

How To Obtain Energy Absolutely Free!

A lot of discussions are being held in the field of availability of energy which can be procured from the air ” free” of cost.This can be done by using the appropriate technology. Research and development is on in full swing in this context, to see, whether this energy is really present, where is it available, how much will it cost to exploit the atmosphere in order to get this energy, and how long will it last?

One may think that this ” free energy device” is some sort of gadget that may be used to amass and send out energy from a resource that is not accepted by conventional science, or a gadget that amasses energy without having to pay anything for it.Some may even think it is like the legendary perpetual motion machine which once it starts driving never stops- something that is undoubtedly not possible.

Anyway it is possible to discover new ways and means to exploit different energies ” floating” free of cost from the atmosphere.Constant endeavor in the research and development field have made the impossible become possible,as seen in the discovery of getting energy from an atom done after 1940. In the 20th century, we saw The Wright Brothers made the impossible feat of flying human beings possible.

It is said that ” free” energy is available in large quantities and can be procured from the Zero Point Field. This is a state of matter that is quantum mechanical and for a specific system which is achieved when the system is at bottom most state of existence it can possibly be in. It can also be called the” ground State” of the system.

In the year 1913 Otto Stern and Albert Einstein declared that Zero Point Energy (ZPE) also known as ” residual” energy, could also be used as an alternative form of energy.In quantum mechanics it is also called” vacuum energy” and is said to symbolize the energy of absolutely emptied space. According to one of the main researchers of Hal Puthof this energy field has been compared to the froth which is present at the bottom of a waterfall.

Puthof also says that this ” zero point” energy would still remain as is it is even if the whole universe would be cooled down to absolute zero where all thermal agitation effects could be frozen out.There is a lot of research on quantum physics being done by practicing physicists but the inferences of this is still not known by them.

Me, along with a group of physicists and colleagues have been working in research labs and universities to see if it is possible to excavate or ” mine” this store-house of energy and use it as alternative energy source. We are also looking into to see if this energy field could be the reason behind inertia and gravity.

Knowing this will be of great importance as it will tell us if this energy can be controlled along with inertia and gravity leading to some major engineering solutions.After all these studies some developments have been seen in the subcategory of cavity quantum electrodynamics. This has been seen in relation to controlling of the emission speed of highly activated atoms and molecules, mainly studied in laser research and in other places.

Ocean Tidal Power as Renewable Energy

One of the Earth’s great renewable energy sources is actually the energy that can be found in all the waves of the ocean. Let’s look at this further.

If you have ever been to the ocean, you were probably fascinated by the phenomena of the waves crashing against the shorelines as the tides came in. The ocean’s tides are the product of gravitational pull of the sun and the moon, as well as, the Earth’s rotation. It causes the ocean waters to be raised and lowered from time to time. The tides have cycles of twelve and one half hours, twice per day, and are easily predictable.

The use of tidal power is seen as early as the twelfth century where tidal mills used the force of the tides to grind grain and corn. The eighteenth century brought competition from windmills and waterwheels. Tidal mills pretty much became extinct with the invention of cheap steam engines. In 1967, France became the first to be able to put tidal wave power to work on a large scale to produce electricity.

The generation of electricity from tidal waves is similar to that of hydroelectric power generation. Bigger dams, known as barrages, are built on the bottom of a tidal basin. Gates on the barrage allow the tidal basin to fill during incoming high tides. Likewise, the basin will empty through a turbine during the outgoing tide. This would turn an electric generator for the production of electricity. There are also systems that generate electricity from incoming and outgoing tides. This system can have a negative effect on plants and animals in the area.

Tidal fences are also used to generate electricity. Vertical axis turbines are mounted on fences. Passing water is forced through the turbines. Ideal locations for these are channels between two landmasses. Tidal fences are cheaper than tidal barrages and cause less of an environmental impact on large marine life.

Tidal turbines are a new technology used for tidal energy. They are similar to wind turbines and are arranged underwater in rows. They work best in areas with strong tides. Although they are heavier and costlier to build, they also are capable of capturing more energy. They are also the least environmentally damaging of all the tidal power technologies, since they do not interfere with migration paths.

In order for tidal power to work successfully it requires a tide difference of at least sixteen feet. Unfortunately there are only a few places where this occurs. This means tidal power plants cannot just be constructed anywhere. There are only a handful of sites on Earth with this type of tidal range. At present, France is the only country that has been successful in using tidal power. It is hoped developments in technology, through research, will be made to allow better use of this, what is now, wasted energy. The future of tidal energy seems hopeful. Tidal power has great potential and hopefully we can make better use of it in the future in our quest to find a replacement for fossil fuels.

Protest at Maine wind power site yields 3 arrests

STRATTON, Maine – A national environmental group says three of its members who blocked the entrance to a western Maine wind power construction site have been arrested.

Maine Earth First spokeswoman Emily Posner says one woman who was arrested attached herself to a truck hauling a windmill blade. The two others arrested were among about 50 people who blocked the road to TransCanada’s Kibby Mountain construction site Tuesday morning.

TransCanada spokeswoman LeAnne LeBlanc says work continues at the site.

TransCanada is building 22 wind turbines on mountains near where it where it’s already built 22 turbines that are producing power. Maine Earth First says projects like TransCanada’s destroy mountaintops and don’t offset fossil fuel use.

From street sweeper to law grad: an Argentine's double life

BUENOS AIRES (AFP) –
Marcelo Iriarte has the measured voice, confident stride, even the suit and tie, of a lawyer, but every day he dons the fluorescent yellow garb of a street sweeper.

” I had a double life. I left one world to enter another,” explained 41-year-old Iriarte, whose astonishing story bridges the massive gulf between Argentina's urban elite and poor.

” I had to learn another way of speaking, and when to be quiet so as not to offend,” the suave law school graduate with a deep tan told AFP.

Iriarte is something of a media sensation in Buenos Aires after his charming story was dug up and splashed about on the front pages of the newspapers and on the television screens.

In a country of immigrants and widespread poverty, the tale of the ” street sweeper turned lawyer” has great resonance.

The son of a poor Argentinian family, Iriarte began working on the streets at the age of eight, selling newspapers, sweets, brooms and other knick-knacks on buses.

He recalled bitterly how one day, after failing to sell a single broom on the buses, he decided to go door-to-door to every business on the street. ” They bought them out of pity,” he said.

Iriarte became a bus driver about 10 years later and it was thanks to that job and a chance encounter that he ended up resuming his studies.

” In that building worked a girl who changed my life,” he said, pointing to the ruined factory where Laura, a mystery passenger he regards as his fairy godmother, sprung from. ” I never saw her again,” he added.

Following Laura's advice, Iriarte re-enrolled back in high school at the age of 35 and swept streets during the day to fund his legal studies.

Rising every day at 4 am to make it to a 7 am class, he wouldn't get home before midnight due to gruelling night courses.

” Mine was an ant's progress and I lost a bunch of things along the way,” Iriarte confessed, without elaborating on what he had lost.

As he spoke, a woman selling coffee from a cart yelled out: ” Look how good you look! ” We are proud of you!”

Beatriz Rolon, 54, the coffee-seller, offered Iriarte a cup of coffee, as she had when he did his homework seated next to her little cart. ” You deserve it after so many sacrifices,” she said.

After graduating in December, job offers piled in from a host of law firms, but Iriarte is worried that legal companies may not offer the same long-term security as Cliba, the Buenos Aires cleaning company where he still works.

And anyway, Iriarte explained, material wealth does not interest him, except as a means to improve himself. ” Before, I was mute. Studying gives you freedom to think,” he said.

Returning to the imposing university from which he graduated several months ago, he sprinted up the stairs and pointed to a wall where he saw his name inscribed for the first time.

” You were in the newspapers, I saw you on TV. You're famous!,” exclaimed his bearded, blue-jeaned law professor, Adrian Carta.

” He never needed our help,” said his classmate Elizabeth Villanueva, 39. ” To the contrary, we needed his.”

Iriarte's boss back at Cliba, Miguel Noell, said he hoped the street sweeper would take advantage of the opportunity to have a legal career.

” All of a sudden a whole new panorama opens up and it is scary. But we don't want to see him over here any more,” Noell said.

Nuclear talks can resume Sept if conditions met: Iran

TEHRAN (AFP) –
Iran's top nuclear negotiator Saeed Jalili said on Tuesday that Tehran could resume talks from September 1 with world powers over its atomic programme if its conditions were met.

Iran's state news agency IRNA said that Jalili in a letter to European Union foreign policy chief Catherine Ashton said that Tehran needs three questions answered by world powers before it can consider resuming talks.

On June 28, President Mahmoud Ahmadinejad declared a two-month freeze on talks with world powers over Iran's controversial nuclear programme, saying it was a ” penalty” after the UN levied fresh sanctions on Tehran.

Next Page »