Browsing Tag Electricity

In many countries today, a lot is being said about harnessing renewable energy technologies – particularly in light of the rising oil prices.

Renewable energy is power which has been generated from renewable resources – in other words, it does not “run out” or eventually become depleted. It can be continuously re-created.

It’s not just the prices of oil that has people searching for clean and renewable energy sources. Global warming concerns, and problems created by international pollution, have triggered this concern as well. Governments around the world have begun to support research on improving the renewable energy technologies.

Currently, the five common renewable energy sources are biomass, hydropower, geothermal heat, wind, and solar power.

Biomass

Biomass consists of organic material which has been produced by animals and plants. Biomass energy uses stored energy from the sun. This is a result of the natural process which any plant uses to survive – photosynthesis.

Because we can always grow new crops and trees, biomass is considered a form of renewable energy. Furthermore, organic waste can be used to create biomass as well.

Some examples of commonly used biomass fuels are crops, wood, garbage, and manure. When these materials are burned, they emit heat which produces steam, that can in turn be used to create electricity. Some biomasses are converted into other usable energy forms, such as methane gas or biodiesel.

Hydropower

Hydropower is one of the oldest forms of renewable energy. It was used in ancient times to grind grain. Coal was once the only source of power in the United States. But in 1880, the first Hydropower plant was built, and since then, more of these have been erected in order to provide the people with electricity.

Geothermal Energy

Geothermal Energy comes from within the Earth itself. The steam or heat which stems from the center of the earth can be used to regulate the temperatures of buildings, and can be used to generate electricity as well.
Because water can always be replenished by rain, and because the earth’s core maintains its temperature, this is considered one form of renewable energy.

Wind Power

Even the ever-present wind can provide a renewable energy source. Wind is created as a result of the uneven heating on the earth’s surface, which causes air to move. Thus, wind power is essentially a bi-product of solar power. Wind propellers are used to collect the wind’s kinetic energy, which turns turbines that are in turn used to create electricity.

Solar Power

This form of renewable energy will be available as long as the sun shines. Solar energy can either be used as thermal energy, or it can be converted into electricity.

As a thermal energy, it can be used to heat water or spaces. Through the use of solar cells or similar photovoltaic devices, it can be used to create electricity. The heat of the sun can also be used to create steam, which turns turbines and thus produces electricity.

Hydropower is energy that comes from water and it can be applied in different means. It has a lot of potentials and these potentials as well as the drawbacks of its application are considered here.

Hydropower makes up at least 10% of the electricity in the United States. It makes use of flowing water in order to spin turbines and produce electricity.

Hydropower is one of the renewable energy sources that is constantly being researched and implemented in order to replace fossil fuels. These fossil fuels are in the process of depletion. It doesn’t produce carbon dioxide as you have with coal power stations. This makes it a whole lot cheaper and makes it a cheaper way to produce electricity. It is also renewable as rainwater replenishes it quite easily.

One of the most common types of hydropower facilities is the impoundment facility. A dam is built on a large river or lake in order to store its water in a reservoir. When the water is released from a reservoir it flows through tunnels and through a turbine. Since the height of the water behind these walls is very great the released water passes through the turbine with immense forces on energy. This force in turn produces electricity. Water may then travel back into the stream or river, networks of transmission lines and facilities also carry the electricity from a generator to users in a form they can use.

One dam that is an illustration of these processes is the Hoover Dam. When it was first created it produced enough electricity for the whole of Las Vegas. As Las Vegas grew in size, people sought out other energy sources for power.

The pumped storage hydro plan facility is able to store power. It easily achieves this by pumping up water from a lower reservoir to a high one during periods that low energy is required. When the needs of people increase water gets released from the upper reservoir back to the lower reservoir in other to generate electricity.

Hydroelectric plants need a lot of land in other to build a dam as well as a reservoir. These all take a lot of money, time and construction too. There are not many places hydroelectric dams can be built and most of the space has already been taken. The great thing is that once they are constructed the electricity becomes free to produce. Due to the costs of construction, the tendency is usually to put up small hydro plants which are more economical.

Hydroelectric plants which are constructed with the use of dams tend to have adverse effects on the environment. With the construction of a dam you have a blockage of the flow from the upstream to the downstream. This blockage tends to disrupt the migration pattern of fish as well. Fish can also be killed as they pass through the turbines. The advantage that hydropower has is that it possesses the ability to control energy release in order to meet ever changing demands.

The population is increasing steadily and so are the power needs of this population. Fossil fuels are constantly being used up and a certain time will come when these fuels have been completely depleted. We have to turn to renewable energy sources in order to meet our needs. Natural sources make for a natural solution. Hydroelectric plants can meet your power needs without you having to worry about depletion or pollution. It is also the most reliable source of electric power currently available. Hydroelectric energy can work and solutions are currently being proposed and researched in order to counter the damage that hydroelectric dams can do.

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Product Description
Renewable Energy Science Kit. Build a working wind turbine. Harness mechanical energy to lift weights. Generate electricity to light an LED and charge a battery. Learn the physics of wind turbines. Discover how wind occurs and why it is such a good energy source. Includes full-color, 32 page experiment manual…. More >>

Thames & Kosmos Alternative Energy and Environmental Science Wind Power

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The Solar Electricity Handbook is a practical and straightforward guide to using electric solar panels. Assuming no previous knowledge of solar panels, the book explains how solar panels work, how they can be used and explains the steps you need to take to successfully design and install a solar electric system from scratch using photovoltaic solar panels. This is an update to the 2010 Edition of the book with even more diagrams, details and up-to-the-minute inf… More >>

Solar Electricity Handbook, 2010 Edition: A Simple Practical Guide to Solar Energy – Designing and Installing Photovoltaic Solar Electric Systems