Welcome to official website of PRES

Renewable Energy

What is Renewable Energy?

Renewable energy is basically the energy that comes from natural sources such as wind,  sunlight,  tides,  rain,  and geothermal heat. Generally renewable energy projects are used on a large scale,  however,  this does not mean that renewable energy cannot be used in smaller areas such as villages or more generally rural areas. A clear example can be seen in Kenya,  where it is estimated that roughly 30,000 small solar power units with a capacity of 20 to 100 watts are sold every year. This is the largest solar ownership rate in the world for residential communities. There are some renewable energy technologies that are disliked for being unreliable but at the same time if you are to look at the renewable energy market it seems to be growing every day.

Renewable energy is the energy from natural sources and minerals like sun,  wind,  and tides nuclear and hydroelectric power. The renewable energy is named so because it is environment friendly and it can replace non renewable energies like oil and coal.

The world is shifting renewable energy sources because of the scarcity of and rising prices of oil and gas.

Forms & Types of Renewable Energy

We will now take a look at the main forms and types of renewable energy. The first major form of renewable energy that we will look at is wind power. Wind has been an energy source for a very long time. It was used by the Chinese about 4000 years ago to pump water for their crops and by sailors to sail around the world. The energy in wind can be used by making a tower which stands high above the sea level with a large propeller at the top. What the wind does is it basically blows the propeller round and round which in turn helps produce electricity. By building not just one but multiple of these towers you can produce more electricity at once. The most suitable area to build these wind turbines would be in coastal areas,  tops of hills,  open fields or basically anywhere the winds are strong and continuous.

Advantages and Disadvantages of Renewable Energy

Now to mention some advantages and disadvantages of renewable energies for e.g. wind power,  wind as we all know is free and can’t be purchased anywhere,  therefore wind power is very cost efficient. It produces no greenhouse gases or waste that could cause harm to the environment. Another advantage is that the land beneath the tower can still be used for farming since it doesn’t take up a lot of space.

Last but not the least wind power is a very good way of providing energy to remote areas. Even though wind is free and can’t be purchased from anywhere this sometimes can be a disadvantage for example on days when there is no wind all one can do is hope and pray for some wind because you can’t just simply go out and purchase it from your local hardware store. Another disadvantage is that these wind farms are usually near the coast,  and near the coast means higher land prices. Some people feel that these tall towers destroy the beauty of the land. Some other disadvantages of these wind farms are they can affect television reception for people in close proximity to them,  they can be noisy,  they can kill birds,  and lastly the wind cannot always be predicted.

Uses of renewable Energy

Renewable energy is of many uses and it can support small as well large applications. Renewable energy from wind,  sun and geothermal is used to produce electricity and heat for use. The solar power plants are used to generate electricity and steam for industrial projects. The energy form the geothermal heat is used to heat radiators in the homes. Thus the renewable energy sources can viably help users to their heat homes. Some other applications of renewable energy sources include heating space,  ventilation,  day lighting,  space cooling,  water heating,  mechanical energy to cut woods and grinding grains. The renewable energy sources and the technologies associated with them are equally important to households and industry.

Important Applications for domestic Users

Renewable energy sources are of many uses to domestic users. Let’s start with the application of solar energy. Solar energy is a nature’s free blessing for everyone. This energy can be utilized without paying any taxes and interests. Solar cookers and solar panels supported with battery are the most popular renewable energy applications for domestic users. Solar cookers can be bought or made at home. The solar cookers re made of silver foil and cardboard mostly. The assembly of these cookers is very easy and the manual is available on the other end. The second basic application is the use of solar panels. Solar panels for domestic use are widely available in the market. These solar panels can be attached to the electricity grid or can be used alone. The sunlight can also replace the small power needs like use of electric dryers for drying clothes and making tea. Small wind turbines are also useful way of generating mechanical energy for certain household chores like grinding, wood cutting and crushing animal feed. However the use of windmill is limited to rural areas where there is less population and more barren land to deploy windmills. Geothermal heat can also be directly converted to radiators for heating the entire home. Passive solar heat and day lighting is another way of using solar heat to lower the overall expenditure of home. The homes should be designed so that one can make maximum use of light during day. Moreover the homes should enjoy the comfort of sun in winters and wind in summers.

1. Renewable energy cannot be depleted like fossil fuels can.

2. Renewable energy sources are in most cases environmentally friendly.

3. Renewable energy can decrease the impact of climate change and air pollution.

4. Renewable energy can boost economies of developed as well as the developing world.

5. Renewable energy means better energy security.

6. Renewable energy means better energy independence.

7. Renewable energy can reduce dependence on foreign oil import.

8. Renewable energy doesn’t create acid rains.

9. Renewable energy is an excellent option to provide power for rural areas.

10. Renewable energy is still not cost-competitive with fossil fuels but is constantly improving its costs.

11. Renewable energy sources like wind and solar energy are still looking for a solution to intermittency issue.

12. Solar energy is currently the most popular renewable energy source in United States.

13. Wind energy is renewable energy source that is most competitive with fossil fuels.

14. Geothermal energy is one of the most reliable renewable energy sources it is available 24-7, unlike solar and wind energy.

Comments are closed.