Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series)


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How much energy can we get from the Sun?

Turn off ceiling lights and use table lamps, track lighting and under-counter lights in work and hobby areas as well as in kitchens.

Solar cells

Hot water is expensive. Learn how to fix that leak. If you're still using that old desktop, recycle it and switch to your laptop. Turn off that old window unit air conditioner for five hours a day while you're away. Recycle or donate your old T. Even if you're just using it an hour a day, that inch LCD is costing you six bucks a year.

Promote airflow through your home and block the afternoon sun.

Avoid using the oven in summer — try salads, smoothies or barbecue. You'll reduce the heat in your home and save on your home cooling costs. Birdlife recently stated that climate change was the single largest threat to birds and wind and renewables were a clear solution to climate change. Wind farms are always subject to an Environmental Impact Assessment to ensure that their potential effect on the immediate surroundings, including fauna and flora, are carefully considered before construction is allowed to start.


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Deaths from birds flying into wind turbines represent only a tiny fraction of those caused by other human-related sources such as vehicles and buildings. It has been estimated that wind turbines in the US cause the direct deaths of only 0. Awareness campaigns such as the Global Wind Day help inform Europeans and people around the world about the benefits of wind energy.

The noise of wind turbines has been reduced significantly. Improved design has drastically reduced the noise of mechanical components so that the most audible sound is that of the wind interacting with the rotor blades. This is similar to a light swishing sound, and much quieter than other types of modern-day equipment. Even in generally quiet rural areas, the sound of the blowing wind is often louder than the turbines. Wind energy is one of the cleanest, most environmentally-friendly energy sources. It emits no greenhouse gases or air pollutants.

It emits no particles, unlike fossil fuels, which are carcinogenic and severely affect human health. The EU accounted for Wind-generated power comes at a zero fuel cost and zero CO2 cost, unlike most traditional energy sources. Wind power can also lower electricity prices and bring more competition to the market. Nuclear is considerably more expensive than wind energy. Because the fuel for wind power production does not have a cost, the cost can be predicted with great certainty, unlike the fluctuations in the price of oil, gas and coal.

The more wind power Europe produces, the less reliant it is on fossil fuels at unpredictable prices. Yes, onshore wind power is competitive once all the costs that affect traditional energy sources - like fuel and CO2 costs, and the effects on environment and health — are factored in. Companies that exceed their CO2 allowance are either fined or allowed to buy unused allowances from greener companies.

Buying allowances at an auction is cheaper than the fine imposed on companies that exceed their CO2 limit, thereby creating an incentive for companies to reduce their CO2 by investing in green technologies like wind power to reduce their own CO2 emissions and create revenue from selling CO2 allowances.

How do solar cells work? - Explain that Stuff

One MWh of electricity produced by coal emits about a tonne of CO2, one MWh of electricity produced by gas emits about half a tonne of CO2, whereas wind-powered electricity emits no CO2. If gas and coal producers have to pay for their CO2 emissions, wind power becomes comparatively cheaper since its CO2 costs are zero.

The zero-cost of CO2, in addition to the savings from the zero-fuel costs involved in producing wind power, means lower electricity prices for consumers since the wind-powered electricity companies will pass the savings on to the consumer. Once this happens on a wide scale, the polluting power technologies will be pushed out of the electricity market as they become comparatively too expensive compared to wind. The most common support mechanism for electricity from renewable energy sources is the feed-in tariff green electricity quotas in combination with tradable green certificates are also used in countries such as Belgium, Sweden, and Romania.

Under a feed-in tariff, electricity utilities must buy renewable electricity at a price that reflects what it cost to generate it. Under this system, the renewable electricity is dispatched in priority to the grid and producers generally sign long-term contracts years for the energy produced. These instruments allow renewables to be developed, and investors to get a reasonable return on renewable energy investments.

What are solar cells?

Certain countries Denmark, Spain use a feed-in premium. This is where green electricity producers get the market price plus a fixed premium. This system, which exposes green electricity producers to market dynamics, is well adapted to countries with a large penetration of wind power. Germany gives green electricity producers the possibility to choose between a feed-in tariff and a feed-in premium.

Although electricity produced by wind is supported by governments, oil, gas, coal and nuclear all receive subsidies, and, despite having been subsidised for more than 50 years, continue to get substantially more than wind. That is still — a quarter of a century in the future — less than two-thirds of the sum being doled out to fossil fuels today.

Europe is dependent on countries such as Russia, Algeria and Colombia for oil, gas and coal. Using an indigenous source of energy such as the wind helps the EU be more self-reliant, providing its own power. In , around , people were directly and indirectly employed by the European wind energy sector — a significant increase from the , employed in By , more than , people will be employed by wind energy.

By , that will be up to , The European wind industry has grown rapidly: nearly 50, additional trained staff will be needed by the industry by A recent report shows that the European wind industry can play a key role in combatting unemployment. EWEA is the voice of the wind industry, actively promoting wind power in Europe and worldwide. It has over members, which are active in over 50 countries, making EWEA the world's largest and most powerful wind energy network.

European Wind Energy Association. EU Completed projects. Press releases Archive. Social networks. Publications Reports Position papers Wind Directions. Statistics European statistics Offshore statistics Global statistics. Offshore wind energy. History 30 years. Job opportunities. National association events. EWEA is attending. Members' Area Forgot your password? Create an account? Wind energy's frequently asked questions FAQ. Category: FAQ topic 1. Category: FAQ topic 3. Category: FAQ topic 2.

Category: FAQ topic 4. That would be roughly the minimum height of the antenna you would need to install. And yes, transmission happens in relatively straight lines.

The good news is the lower frequencies like MHz, travel farther since they are not weakened attenuated as much by obstacles in the line of sight path like buildings and trees. As for the numbers , and they represent the various cellular frequency bands in megahertz which are highly regulated by each country's respective authority as to who can use them and their actual frequency allocation within that cellular frequency band. Hope that helps and good luck! Hi I'm in the Magdalen Islands and not only is my house not covered by cell phone coverage, but the internet cable connecting the land lines and internet service to the mainland is getting more and more spotty.

I'm thinking of putting an antenna in place but the tower is hidden behind a hill and I can only get reception if I climb up the hill beside my house. The problem is that there, the cable would be a lot longer than 20 ft. I don't know how high I would have to have the tower to get a straight line over the hill between my house and the tower. Does transmission happen in a straight line? Another question: The tower closest to me is rated at mhz, mhz and mhz.

What do the and figures represent? And thank you for your innovative idea! Sctb So for locating towers in Belize you can start with the opensignal. Specifically ask them for the frequency and azimuth of the nearest tower. As for building the tower, the blog post above does walk you through what needs to be purchased and how to build it.

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Hope that helps but feel free to ask more questions here. Hi All, Thinking seriously about moving to Belize, but the lack of internet and cell service is a deterrent. Your ideas and suggestions on how to identify local cell towers in Belize would be helpful. Your guidance would be greatly appreciated.

Larry, The good news is occasionally you can receive a text by the cabin, which means there is a signal there, albeit very weak. And mobile phones with degree omni wide band antenna patterns cannot handle these fringe situations. So given that, I would say a cell tower like the one in this blog will provide you coverage in the cabin.

As I've commented many times, a focused narrow band external antenna is critical, but let me explain that. Narrow band means the antenna was designed and optimized for a specific frequency band and not multiple bands.

Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series) Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series)
Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series) Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series)
Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series) Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series)
Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series) Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series)
Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series) Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series)
Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series) Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series)
Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series) Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series)
Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series) Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series)
Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series) Energy: 25 Projects Investigate Why We Need Power & How We Get It (Build It Yourself series)

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