Category: News And Society


Wind Power

Celeste Yates asked:




The latest report of BWEA (British Wind Energy Association has stated that Wind Power is currently the fastest growing energy technology. They are aiming to have 5% of the UK’s power requirements coming from onshore wind farms, by 2010. The UK Government is looking have another 10% of the energy coming from other renewable resources, by the same date. They are investing around 1

Solar Energy Overview

Richard Chapo asked:




Solar energy is a renewable, clean energy that has been around for thousands of years in one form or another. Following is an overview of solar energy.

Solar Energy Overview

Solar energy is all about harnessing the power of the sun to produce energy. The sun rains enough solar energy on the Earth in one day to power the entire energy needs of the world for one year. Solar energy is considered a renewable energy source because it will exist for as long as our sun does, estimated to be another 4.5 billion years. Solar energy is also considered a clean energy because it does not produce pollutants or byproducts harmful to the environment.

Solar energy was the first energy source used by mankind. Of course, the use was limited to drying things and heating caused by direct contact, but it was a use. In modern times, solar energy has been a power source since the early 1950s, but was not widespread due to technological issues which rendered it an ineffective and expensive energy source. With technology advancements, solar energy is moving to the forefront as a potential alternative to fossil fuels.

The future is indeed bright for solar energy as new solar nanotechnology is close to creating solar platforms that boggle the mind. For instance, a few companies are trying to create solar quantum dots, which will be mixed in the paint you use for your home. Yes, you will actually paint on solar energy panels that will power your home

Currently, solar energy is produced primarily through the use of solar cells, also known as photovoltaic cells. The process works by placing the cells in direct sunlight. Sun hits the cells causing a chemical reaction that creates an electric current. The current is then turned into electricity. The problem with these cells, however, is they are only about 15 percent efficient.

Solar energy is typically classified in two ways, passive solar and active solar. Both approaches produce solar energy, but in very different ways

Passive solar is exactly what it sounds like. It does not involve panel systems or other moving mechanisms to produce solar energy. Instead, passive solar involves planning a structure in such a way as to capture the power of the sun with windows, tanks and so on. These systems can be used to heat homes, water and so on.

Active solar energy systems typically involve some form of solar panels. The panels are oriented to maximize exposure to the sun. Depending on the system, the panels will then either directly convert sunlight to electricity, which is then transformed from direct current electricity to alternate current electricity and stored in batteries or fed into the grid system of the local utility. Active systems are more expensive and complex.

Solar energy has numerous advantages over other energy platforms. It is produces no pollution, requires little maintenance and comes with significant financial incentives in the form of tax deductions, tax credits and rebates from manufactures. In a majority of states, solar energy can also be sold back to utilities per a concept known as net metering. This reduces the need for batteries and significantly cuts utility bills.

Unfortunately, solar energy has some disadvantages as well. The initial cost of purchase and installation can be expensive. Second, areas with limited sunlight are problematic. Third, solar energy obviously can’t be produced at night. Despite these disadvantages, solar energy is a booming energy platform.

The largest producers of solar energy in the world are Germany, Japan and the United States. California has recently introduces a solar initiative devoting over three billion dollars to promoting solar energy use by residents in the state. As this overview demonstrates, the solar energy platform is coming on strong.

Solar Energy
Mohd Sameer asked:




With the recent Oil Spill by BP in the Gulf of Mexico and the recent concerns for Global warming, various Governing bodies of different countries and various business organizations, including NGOs have begun to focus their attention even more than before towards the Renewable Resources of Energy.

As we all know, the Oil Spill in THE Gulf of Mexico was not only a great loss in the share market, or BP’s shares, or the price fall down for oil, but it was a man-made disaster which could have been prevented. Oil the most important energy resource due to which the technology, which is a part and parcel of our mundane world, exists. With this incident, we have to think in more futuristic terms and contribute every bit to conserve energy, and prevent global warming as a consequence.

When we talk about renewable energy, the most direct answer to such a query of ours is the Sun. this is because sun is the sustainer of our being and its energy is the most efficient in usage. With vast developments, science has come up with various products providing daily use appliances which use sun as its source, and not electricity. There are direct methods of producing electricity from solar cells using Photovoltaics. Germany and Portugal have successfully installed the largest Photovoltaic Systems. There are many Photovoltaic Trees being used for local usage. There are also indirect ways, or the conventional ways of producing electricity known as the CSP Systems, i.e. The Concentrating Solar Power Systems. The most popular Solar Products are the solar water heater, solar inverters, solar electric appliances, solar cooking appliances etc.

Barring the environmental advantages, people tend to overlook the solar energy, because for many, the solar energy systems burn a hole in their pockets. But it is time to review such an outlook. Let us take the example of Solar Tucson Products. The people living in Tucson are given incentives and rebates on the purchase of the solar products. After purchasing the product, the customer is given a rebate depending upon a deduction in the price per watt purchased. Not only this, the Tucson Electric Power also provides you a further rebate. There are also various financing schemes for your product.

All of the details can be gathered from a local Tucson Solar Dealer who can tell you how exactly the rebate will profit you not only in monetary terms, but also in environment friendly terms.

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Free Solar Energy For AZ Schools!

Nathan Lew asked:




A proposal in Arizona could change the way solar energy is marketed.

Typically, solar energy firms install solar panels, or arrays, on a given facility and the proprietor (business or homeowner) buys or leases the setup, uses the electricity, and sells any excess back to the local or regional utility which supplies power to the facility.

In Scottsdale, Foster City, a California-based SolarCity Corp. wants to install solar panels on two school roofs, essentially for free, and allow the school district would buy the electricity generated.

This has regional utility Salt River Project (SRP) up in arms. Arizona Public Service Company, the other regional utility (and the larger by 3,998 megawatts and 600,000 customers), has posed no objections, even though both will be required to testify before the Arizona Corporation Commission, Arizona’s equivalent of a public utilities commission.

The schools in question are Coronado and Desert Mountain high schools. The issue in question is: can a solar manufacturer operate as a utility? Backers of the proposal see it as a huge incentive to solar power, because it frees proprietors from the sometimes huge upfront costs of installing solar arrays. Opponents argue that it would let solar panel manufacturers sell electricity without the oversight of state utility regulators, leading to electric-pricing disputes and abuse.

Returning to the issue of upfront costs in solar power, some have noted that, while individuals and even corporations can offset these with any number of federal, regional and local incentives, government buildings and schools aren’t eligible for many of them, largely because such properties are financed with tax-exempt private activity bonds or other federal, state, or local subsidized financing (Section 48 of the Investment Tax Credit).

SolarCity argues that those limitations are slowing the growth of solar power, and many educators and public officials agree. Equally as important, SolarCity, as the installer and owner of record, can take advantage of those incentives, meaning they aren’t lost and are reflected down the road in cheaper installation costs across the board as profits drive down the cost of solar panels.

That benefit alone, in a time of continuing recession, is tempting. According to SolarCity, schools could save $4.7 million on energy over the next 15 years by adopting the process.

SolarCity is not the first to make the suggestion, either. In October of 2008, Solar Alliance, a state-based advocacy group for solar designers, manufacturers, installers and financiers, asked the Corporation Commission to approve similar proposals. In fact, third party ownership using power purchase agreements (PPAs) was discussed as an option on Eshone Energy’s blog.

The Arizona Corporation Commission has yet to get back to them, because the decision-making process challenges so many utility paradigms that there are no parallels, or precedents, to draw upon.

This is especially true as customers would still be connected to their local utility for electrical needs beyond the capacity of the individual solar systems. Also weighing heavily on the equation are Arizona’s renewable energy mandates, which requires utilities to get 15 percent of their energy from renewable sources like solar and wind by 2025.

SolarCity has so far rebutted SRP’s challenge by saying that, since it is not a monopoly, it doesn’t need Corporation Commission regulation.

As Corporation Commission Chairwoman Kris Mayes points out, the entire solar community (and the nation) is waiting for a resolution of these difficult issues. Tom Alston, the head of Solar Alliance in Arizona, confirms that, and notes that more than half the recent applications for solar installations in the state have been coordinated through a solar-service agreement like the one SolarCity offers.

Clearly, if the proposal is rejected, solar will suffer a huge defeat in sunny Arizona.

The 5 Types of Solar Energy

Dick Jonson asked:




With Solar power potentially being I significant ingredient in the cake of renewable energy sources the world will need to replace fossil fuels it is important to understand the different types of Solar power. This article will give an over view of all the different types.

o Solar Cells -Just about everyone has seen solar cells being used on pocket calculators with LCD displays. This is of course not the only sue for a Solar cell with many being placed on top of buildings. Most Solar panels are made form silicon and act as semi conductors converting sunlight directly into electricity.

o S Fibers – This method is similar to Solar cell in that sunlight is converted directly to electricity. Unlike the Solar cells however this method uses a solar tape made from titanium dioxide. It has been suggested that this tap could be used in building materials or even in the construction of cars.

o Solar Chemical Power – Solar Chemical Power is still in the early stages of research but the theory behind it is that a chemical reaction is used to turn sunlight into electricity.

o The Solar Pond – The Solar pond uses three different layers of salt to prevent heat convection and store energy from the sun. A solar Pond would typically be used to provide heat rather than electricity.

o The Solar Updraft Tower- The Idea of the Solar updraft tower is that air passes through a green house like building and becomes heated this air is then channeled through a tower where it rises and drives turbines in much the same way as a conventional power station.

Most of the technologies mentioned above are still in their infancies but some appear to be very promising in particular solar fibers, which have huge potential as they can be integrated into other materials. This could in theory lead to buildings that could power themselves through absorbing light using their brickwork or cars that charge themselves up with energy if left in the sunlight. Clearly Solar Power is a good way off this at the moment but in time Solar Power is a technology that really could change the world.

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Anita Van Wyk asked:




Many of us know that solar energy is a good thing, but few really understand why. Therefore, I compiled a comprehensive list of solar energy advantages and disadvantages that will enable you to make an educated decision whether on not Solar Power is right for YOU.

Solar Energy Advantages

1. Saves you money

After the initial investment has been recovered, the energy from the sun is practically FREE. The recovery/ payback period for this investment can be very short depending on how much electricity your household uses. Financial incentives are available form the government that will reduce your cost. If your system produce more energy than you use, your utility company can buy it from you, building up a credit on your account! This is called net metering. It will save you money on your electricity bill if you have one at all. Solar energy does not require any fuel. It’s not affected by the supply and demand of fuel and is therefore not subjected to the ever-increasing price of gasoline. The savings are immediate and for many years to come. The use of solar energy indirectly reduces health costs.
2. Environmentally friendly

Solar Energy is clean, renewable (unlike gas, oil and coal) and sustainable, helping to protect our environment. It does not pollute our air by releasing carbon dioxide, nitrogen oxide, sulphur dioxide or mercury into the atmosphere like many traditional forms of electrical generations does. Therefore Solar Energy does not contribute to global warming, acid rain or smog. It actively contributes to the decrease of harmful green house gas emissions. It’s generated where it is needed. By not using any fuel, Solar Energy does not contribute to the cost and problems of the recovery and transportation of fuel or the storage of radioactive waste.
3. Independent/ semi-independent

Solar Energy can be utilized to offset utility-supplied energy consumption. It does not only reduce your electricity bill, but will also continue to supply your home/ business with electricity in the event of a power outage. A Solar Energy system can operate entirely independent, not requiring a connection to a power or gas grid at all. Systems can therefore be installed in remote locations (like holiday log cabins), making it more practical and cost-effective than the supply of utility electricity to a new site. The use of Solar Energy reduces our dependence on foreign and/or centralized sources of energy, influenced by natural disasters or international events and so contributes to a sustainable future. Solar Energy supports local job and wealth creation, fuelling local economies.
4. Low/ no maintenance

Solar Energy systems are virtually maintenance free and will last for decades. Once installed, there are no recurring costs. They operate silently, have no moving parts, do not release offensive smells and do not require you to add any fuel. More solar panels can easily be added in the future when your family’s needs grow.
Solar Energy Disadvantages

The initial cost is the main disadvantage of installing a solar energy system, largely because of the high cost of the semi-conducting materials used in building one. The cost of solar energy is also high compared to non-renewable utility-supplied electricity. As energy shortages are becoming more common, solar energy is becoming more price-competitive. Solar panels require quite a large area for installation to achieve a good level of efficiency. The efficiency of the system also relies on the location of the sun, although this problem can be overcome with the installation of certain components. The production of solar energy is influenced by the presence of clouds or pollution in the air. Similarly, no solar energy will be produced during nighttime although a battery backup system and/or net metering will solve this problem. See http://www.dsireusa.org for details on how net metering allows you to save electricity and money. As far as solar powered cars go – their slower speed might not appeal to everyone caught up in today’s rat race.

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Ian Pennington asked:




There are lots of sources that you can use in knowing different facts about solar energy. These facts are usually tackled in science subject. Anyway, do you know the meaning of solar energy? Well, it simply refers to as the energy from the sun. But sometimes it is also hard to determine which facts are true and which are just opinions. This article will give you some of the top interesting facts about solar energy:

o Solar energy is considered to be a renewable source; it may not be seen at night but it constantly exists.

o It will not give harm to the environment. It will not create air pollution that has carbon dioxide and some damaging dirt emissions and greenhouse gases.

o The solar energy is very useful in everything. It is capable of drying the clothes, heating water, heating swimming pools, powering minor appliances, powering fans in the attic, producing indoors and outdoors light, and even powering cars.

o The products made from the solar energy can be extremely expensive. Possibly the excessive cost could be the major downside.

o It will be economical to run the installed products. No wonder why, the energy coming from the sun is very free.

o If you made an excellent solar energy system and it generates more excellent energy compared to the one that you’re using, there will be a possibility that some company will purchase it from you.

o You can live independently with the use of solar energy. There is no reason for you to get energy sources from other sources.

o It is so easy to operate the solar energy system, because there is no need for you to connect it from power grid or gas.

o You can easily set up solar energy from remote areas.

o You can still have electricity supply if there is power blackout.

o The best way to improve the energy is to add some solar panels.

o Cars powered with solar energy have slower speed.

o It requires minor maintenance and can be used for long period of time.

These are just some of the interesting facts about solar energy that can help you in many ways. Try to consider using this to save money and help conserve the environment at the same time.

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Ray Boreham asked:




It’s a fact that there are many advantages to implementing and using solar energy, but what are the top advantages of using solar? That’s actually a very subjective issue because one person’s major advantages may be another person’s major disadvantages, so we’ll take a look at what are generally regarded as the top advantages of solar and you can form your own opinion as to whether or not these would make your own list.

It’s Clean And Renewable

Solar energy comes from the sun so no fuel sources are needed to generate it and most of the more popular renewable energy systems produce little or no carbon emissions, making them about the cleanest source of energy available. The sun supplies us with energy each and every day in the form of light and heat, and even the wind results from the sun’s energy heating the Earth unevenly and cool air colliding with warm air, so it’s totally renewable.

Solar energy can be harnessed in various ways and most people are actually taking advantage of it every day already without even realizing it! It’s true. Let’s give you a little test just to demonstrate (one slight proviso here though – you must have drapes or blinds or some other type of covering over your windows; if not, pretend!).

When you get up in the morning, what’s one of the very first things you do? Open your drapes, right? If you answered in the affirmative, then you are actually making use of the sun’s energy via a process known as passive solar heating, which is a method of harnessing radiant heat from the sun streaming through windows for later use in material, such as concrete or water, known as thermal mass.

That’s just one example of how we’re able to harness the sun’s abundant energy freely with little or no effort. With a little planning and expenditure, both passive solar heating and cooling can be used to substantially offset one’s energy costs.

Free Energy – And Plenty Of It

The sun supplies us with energy in the forms of light and heat every day, 365 days a year, at no cost to us whatsoever. We’re generally a bit blase about the energy we get from the sun, taking for granted that it’s always going to be there. Fortunately, we don’t need to worry about it going away any time soon, but it would behoove us to take as much advantage of this free, abundant energy as possible while we can, just in case.

In fact, there’s so much surplus energy coming from the sun that, even if we were able to harness all the sun we could to power everything we use, there’d still be more energy left over than we’d know what to do with. We actually receive over six thousand times more energy from the sun in one hour than is used by the population of the whole planet in one year. So, even though we’re doing better at harnessing the sun’s energy, we’re really barely scratching the surface of what’s possible.

Take It With You When You Go

More and more applications are being found for solar nowadays, and the applications themselves are getting smaller all the time, so much so that practically everything you can do at home, you can now find a portable solar solution for.

Imagine if you’re out in the wilds or your car’s broken down somewhere in the middle of nowhere and you find your cell phone battery is dead. What do you do? Well, if you have a portable solar charger, you can attach it to your cell phone, wait a few minutes (as long as there’s plenty of sunlight) and you’ll be able to make a call to let loved ones know where you are or to have someone come to your rescue. How great is that?!!?!

If you have a laptop, there are solar laptop bags which will charge your laptop while it’s in the bag.

There are many other portable solar products available, including radios, shavers, cell phones, etc., and the number and variety of portable products available will only increase as the technology becomes more refined and sophisticated over time.

Whether or not you agree that these are the top advantages of using solar energy (it is, after all, a very subjective point of discussion), these are among the best and there are so many more advantages when it comes to using solar that they would probably fill a book.

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Joe Hayes asked:




There are many wonderful advantages of using solar energy to fuel our world’s energy needs. Currently the industrialized world relies on crude oil and coal to fuel our vehicles, homes, factories and even generators we use to make power themselves. While the technology is still being developed, there are many benefits to using solar power.

For starters, solar energy is clean. There is no carbon footprint left when using the sun for power generation. There are no greenhouse gases or C02 produced to make solar power. Solar energy does not contribute to acid rain, smog or global warming. Solar power is cleaner than nuclear power, in that there is no radioactive elements to worry about endangering communities and there isn’t any toxic chemicals and waste to get rid of. It is completely clean and “green,” which is the way of the future.

Another great advantage to using the sun for power is the abundance of sunlight. It’s everywhere, and it won’t deplete for literally billions of years. It’s better than natural resources, because we don’t have to wait for solar energy to regrow. If we can harness the power of solar energy in an effective way, there is more than enough to power all of our energy needs forever.

Solar energy is great for the world’s economy. As mentioned earlier, it’s a growing field and we’re still innovating unique and effective ways of harnessing the sun’s power. This will create new jobs for that innovation, as well as jobs to apply and build and maintain the tools we will use to harness that power.

In addition to the obvious benefits, solar energy is quite – no moving parts are needed to store and utilize the energy from the sun. The solar panels needed to produce energy need very little maintenance, and if energy needs increase it’s easy to add more panels for more power.

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Types of Solar Energy

Anne Clarke asked:




Solar energy comes in many forms. The majority of us are most familiar with solar cells, but there are actually many different ways to create and store solar energy. Here are a few of those ways:

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