UMNewsService asked:

A device called VIVACE developed at the University of Michigan draws power out of slow water currents to produce clean electricity. It imitates the swim strategy of a school of fish.

Newton

WindPowerVideo asked:

www.unendlich-viel-energie.de The secure and constant provision of power anywhere and at anytime by renewable energies is now made possible thanks to the Combined Power Plant. The Combined Power Plant links and controls 36 wind, solar, biomass and hydropower installations spread throughout Germany. It is just as reliable and powerful as a conventional large-scale power station. The Combined Renewable Energy Power Plant shows how, through joint control of small and decentralised plants, it is possible to provide reliable electricity in accordance with needs. The Combined Power Plant optimally combines the advantages of various renewable energy sources. Wind turbines and solar modules help generate electricity in accordance with how much wind and sun is available. Biogas and hydropower are used to make up the difference they are converted into electricity as needed in order to balance out short-term fluctuations, or are temporarily stored. Technically, there is nothing preventing us from 100 per cent provision with renewables. The Combined Power Plant is an initiative of the companies Enercon gmbh, Schmack Biogas AG and solarworld AG, and is supported by many partners from the renewable energy sector.

Chris

rockinrapunzel asked:

video i made for science about renewable energy, energy transfers and electricity. Using funky music from the apples in stereo. In memory of Treacle the hamster who has passed away. Oakmeeds

Hermine

whatiship100 asked:


Can someone please explain if and how I can buy renewable energy certificates for my apartment electricity use. My local energy company does not currently provide renewable energy and I am under the impression I can buy certificates from renewable energy companies and use those certificates to pay for my current electric bill.

Can you please explain this process.

Nate

Madison Greene asked:


It is estimated that our natural resources will be completely depleted within the next 150 years. It is because of this that we as a society need to be actively searching for sources of alternative energy.

Alternative energy, whether it is used to replace fuels such as coal, or to reduce our reliance on petroleum based fuels; alternative energy is one of the most important issues facing society today.

The two most common types of alternative energy are:

* Wind power

* Solar power

Both of these alternative energy sources are harnessed from natural resources, and as such are completely free. Only the equipment and technology cost money, and over time as we advance the costs should be reduced.

It is these free sources of alternative energy that we should be pursuing with the most fervency, so that, eventually, energy can be available to all regardless of income. Below we will take a look at these two most common sources of alternative energy.

Wind Power

Wind power, while a free source of alternative energy, would be the most costly type of renewable energy to power our nation. This is largely in part to the fact that we must first place wind turbines across the country, in enough numbers to provide electricity to communities nationwide, even in areas where the wind velocity is not as strong. The cost of building enough of these turbines to harness the wind’s alternative energy would be staggering.

Also these wind turbines are very unsightly and would ruin very beautiful and scenic parts of the country. It should also be noted that they only produce power 1/8 of the time that they are running. That is not very efficient, but we are on the right track, things just need improvement.

Another problem I see with wind turbines is the amount of profit many companies stand to make for putting them in. Individuals are making millions off of this and that is just not right when our well-being is at stake.

However, if you’re interested in using wind power as your own source of alternative energy, it is a viable option. Many farms and rural communities use these wind turbines to power themselves. In smaller numbers, the cost of building the turbines pays for itself relatively quickly. But wind energy is only one form of alternative energy. Next, we will look at using solar power as an alternative power source.

Solar Power

Solar power is alternative energy derived from the power of the sun. Solar energy is also completely free, except for the cost of installing the equipment necessary to convert the sun’s rays into usable electricity. This equipment is becoming less and less expensive every day. Solar power generally ends up paying for itself within the first few years.

The equipment needed to use solar power as an alternative energy source for your home can be bought at virtually any home improvement store, and can usually be installed in just a few hours. If you don’t feel comfortable doing it yourself, there are a great number of contractors available who can install your solar panels and generators for you.

Regardless of which type of alternative energy you choose to use in your own home, the fact remains that we must find a renewable source of energy soon, or be at risk of losing the few natural resources we have left to burn. Contact your Congressman today, and ask what is being done to find a good source of alternative energy; and what you can do to help.



Sean

Gregg Camp asked:


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After long wait, the supposed energy “crisis” just might force politicians to finally get us off the Middle Eastern tit of oil. I am going to put myself out on a limb here and say that I actually think the high gas prices are a good thing. While they do leave a pain in the wallet of most American families – mine included – the reality is that the way we Americans seem to learn best is through the wallet.

Take cigarettes, for example. When the cost of a pack of cigarettes became so high that buying them became more than a thoughtless expense, the consumer demand for smokes started going down. How many remember all those surgeon general warnings and studies showing that smoking was bad for us? All the warnings in the world weren’t enough to get people to put out their smokes. It wasn’t until the cost started to rise that people finally took notice. The point is that money talks when it comes to getting us to make a change, and I firmly believe that the same holds true when it comes to making an energy change.

It didn’t take the Japanese long to figure out that Americans make decisions with their wallets. That is precisely why they are building more economical automobiles while providing the level of quality American consumers demand. Thanks to the better leadership of Japanese companies and their desire to invest in energy saving technology, a growing number of Americans are making better energy choices with their wallets. While it may take awhile for us to make the transformation from gas to hybrid technology to sensible ethanol, biomass or hydrogen technology for our transportation, there are choices that Americans can already be making right now in their own homes that can help with the “crisis” we are currently facing.

The facts are simple. The vast majority of electricity comes from coal fired plants, followed by natural gas, nuclear and hydroelectric plants. In the future, we can hope that biomass technology will also contribute substantially to electrical production. At present, there are also many wind and solar projects in the works, but there is still a need for a greater amount of change.

Experts agree that most consumers realize global warming is occurring and are at least somewhat aware of the importance of shrinking their carbon footprints. Most think this involves having solar panels on their house and using fluorescent light bulbs. While both are certainly helpful, getting green power is an easier and more effective step to take.

Unfortunately, the National Renewable Energy Laboratory estimates that only 700,000 out of 122.5 million American households are buying green power. While it is true that not all households have access to green energy sources, only about 1.8% of those with access to green energy are participating in these programs. Some areas of the country, such as Palo Alto, California in Silicon Valley, are ahead of the curve when it comes to switching to green energy. In fact, the participating rates in this part of the country are at about 20%. Palo Alto is somewhat of an anomaly in that the city is home to a highly educated affluent populace that is receptive to change and innovation. Nearby Santa Clara also has stellar participating rate of about 8.7%.

But, the real question is why aren’t more people taking advantage of these programs? The answer is simple: many are not aware that they can actually buy green power.

The Green Power Network, which is run by the department of energy, makes it easy for you to see whether or not you can purchase green power through your local utility company. While there is a small premium for choosing green power, most can easily make up for the extra cost by foregoing their daily super latte from the coffee shop.

Currently, 44 states offer green electrical power to their customers. In order to participate in one of these programs, you simply buy and pay for green power from your usual supplier. For most Californians, this would be either Pacific Gas & Electric or Southern California Edison. Your supplier then applies the amount of power you purchase to the grid system.

Most power companies also sell green “renewable energy certificates,” or RECs, separately. RECs represent one megawatt hour( MWh) of renewable energy, which may be produced from solar, wind or other renewable sources. Each MWh you purchase means that one less MWh of the polluting coal variety needs to be produced.

Excluding hydroelectric energy, only about 3% of our nation’s energy currently comes from renewable energy sources. In California, the figure is more like 11% and new legislation mandates that utility companies produce 20% energy of their energy from renewable sources by 2010. As you can imagine, the companies are scrambling to sign contracts with renewable energy producers. The reality is that there may not be enough capacity for them to meet the goal by 2010 but, if you ask me, the goal should be higher and the state should be shooting for having 33% of its energy being from renewable sources by 2020. Now, that is a goal that can make a real difference.

 

 

 

 



Kai-Tak

Chaosman asked:


Why not build an office building sized electricity generating station in a major city that incorporates – the entire outside of the building is covered in super-efficient solar panels, the top of the building has a solar heat generator, the bottom of the building has geothermal heat generating power, a giant wind turbine at the top generating wind power…any others that could be added to a building? I wonder if it would generate a decent amount of energy?

Pilar