Renewable Energy Resources and Their Role in Our Lives
Benefits of the various renewable energy sources
A source of power harvested from a sustainable and long-lasting source, such as the sun or wind is referred to as renewable energy. I.e., it is energy from a non-nuclear source that is in constant supply over time. The supply of fossil fuel energy sources is limited, as these fuels are used much more quickly than they can be formed by nature. But the sources of renewable energy are expected to last for billions of years. There are a number of energy sources that are renewable and considered to be environmentally friendly and harness natural processes. Renewable energy is an infinite power source that doesn't pollute the environment and are the key to a cleaner and greener future.
Renewable Energy: Power for a Sustainable Future
The sun is the most powerful source of energy. Solar energy is harvested from the sun. This energy is used for heating, lighting and cooling homes and other buildings, generating electricity, water heating, and a variety of industrial processes. The installation of solar cells has become very easy due to its efficiency, transportability and flexibility. Most of the other renewable energy sources come either directly or indirectly from sun. The heat of the sun is drawn by Photovoltaic cells in the form of kinetic energy. It is then converted into electricity by transferring it in to a generator. These panels are then paired together on large solar farms to harvest enough energy to power small areas or units
Wind is formed when warm air rises and cooler air rushes in to replace it. It generates a lot of clean energy. In wind farms, large windmills are used to capture the power of wind and this energy is send to a turbine. Wind turbines are used to convert wind energy in to useful forms such as electricity or mechanical energy. Local power transmission network with small turbines are being connected to large-scale wind farms, to provide electricity to isolated areas. Wind power is an easy renewable source of energy that has been used for centuries to sail ships and drive windmills that grind grain. Generation of electricity is the principal application of wind power today. When compared to all other energy sources, wind farms installed on agricultural land or grazing areas has very less environmental impacts. 1.5% of worldwide electricity use is contributed by wind energy. But the use of wind energy to produce electricity is growing rapidly.
An Introducton to Alternative Energy Sources
Flowing water is a gift of nature and the water flowing downstream is a powerful force. Hydropower is used to generate electricity which is called hydroelectricity. Water wheels are powered to drive mechanical processes using flowing water. Dams are created to capture water and directed to flow through turbines. This force of water is used to create electricity. No direct waste is produced in a hydroelectric complex. Hydro power has become an increasingly popular alternative energy source, especially in remote areas where other power sources are not viable. Installation of small scale hydro power systems requires only small rivers or streams with water wheels to generate energy. Currently, hydro power is the most widely used form of renewable energy.
The heat from the ground is used to produce geothermal electricity. It is a cost effective, reliable, and environmentally friendly form of energy. Steam is produced underground by the collection of heat during daytime. This energy can be drawn from deep underground reservoirs by drilling or from other geothermal reservoirs closer to the surface. This is then used to power generators and produce electricity, or for other applications such as home heating and power generation for industry. Though the capital costs of a geothermal plant is high, it requires no fuel and is therefore immune to fluctuations in fuel cost.
A video on The Future of Renewable Energy
All plants, trees and organic matter on the earth are described in one word as biomass. As a source of renewable energy it refers to the living and recently dead biological material that can be used as fuel or for industrial production. But wood is the most common source of biomass energy. Since the natural process of photosynthesis constantly produces new organic matter in the growth of trees and plants, it is a renewable source of energy. It is photosynthesis that stores the sun’s energy in organic matter. Biomass energy is very useful in the production of heat, electricity and liquid fuel which can be used for transportation or for the production of products that would require non-renewable fossil fuels. It has been an important source of energy ever since people first began burning wood to cook food and warm themselves against the winter chill.
Several forms of renewable energy are provided by oceans which are driven by different forces. Both the energy formed from ocean waves and tides and from the ocean thermal energy can be used to generate electricity. The energy generated from ocean is generally not cost effective, more environmentally friendly and causes less impact on established ecosystems. Although this form of energy is not in wide use, it has potential for future electricity generation.
Many people have started looking at the benefits of the various renewable energy resources as society became more aware of the need to protect and preserve our planet. The sources of energy mentioned above provide an alternate ‘cleaner’ source of energy, helping to negate the effects of certain forms of pollution. Since all of these power generating techniques do not deplete any resources to create the energy, they can be described as renewable. These renewable sources of energy produce little or no pollution or greenhouse gases, and they will never run out.
When compared to fossil fuels, renewable sources of energy have got several advantages. Even though the cost of building power plants to produce energy from renewable resources is initially costly, the cost can be less in the long run. Though the earth has provided us with an incredible amount of renewable energy sources to supply our needs, the determination to make use of them must be built in each. The article provides a lot of information regarding the various renewable sources of energy that has been in use today.
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