Renewable energy is an energy source which collected from renewable resources, which are naturally replenished on a human timescale, including carbon neutral sources like sunlight, wind, rain, tides, waves, and geothermal heat.
Renewable energy, often referred to as clean energy, comes from natural sources or processes that are constantly replenished. For example, sunlight or wind keep shining and blowing, even if their availability depends on time and weather.
Renewable itself defines as something which can be renewed i.e. refresh or remade from existing. So something which keeps on going and replenishes itself is called a renewable energy, such as energy generated from tides, waves, winds are few of the examples. Since these energy generators are naturally found and doesn’t cause much harm to the surrounding and therefore provide enough of energy, hence it is termed as renewable energy.
Sun is a natural source of energy, we see the sun every day and it has effectively been an essential part of our daily needs. We cannot imagine our lives without the sun, since years farmers have been growing crops, using rays from the sun, we have been drying our clothes, and plants are doing photosynthesis. Since the sun provides life and energy, life is impossible without it.
As we have our day-to-day chores connected with having bright sunlight, people thought it convenient to save it. Sunlight from the sun was therefore converted in form of energy i.e. solar energy is radiant light and heat from the Sun that is harnessed using a range of ever-evolving technologies such as solar heating, photovoltaic, solar thermal energy, solar architecture, molten salt power plants, and artificial photosynthesis.
Solar, or photovoltaic (PV), cells are made from silicon or other materials that
transform sunlight directly into electricity. Distributed solar systems generate
electricity locally for homes and businesses, either through rooftop panels or
community projects that power the entire neighborhood.
Biomass is a fuel that is developed from organic materials, biomass energy is therefore the electricity generated from biomass, it is sustainable and renewable. Biomass energy is the energy generated or produced by living or once-living organism. Biomass is organic, meaning it is made of material that comes from living organisms, such as plants and animals. The most common biomass materials used for energy are plants, wood, and waste. These are called biomass feedstock. Biomass energy can also be a non-renewable energy source. Biomass contains energy first derived from the sun: Plants absorb the sun’s energy through photosynthesis, and convert carbon dioxide and water into nutrients (carbohydrates). The energy from these organisms can be transformed into usable energy through direct and indirect means. Biomass can be burned to create heat (direct), converted into electricity (direct), or processed into biofuel.
Tides are very long-period waves that move through the oceans in response to the
forces exerted by the moon and sun. Tides originate in the oceans and progress toward the coastlines where they appear as the regular rise and fall of the sea surface Tidal energy is created using the movement of our tides and oceans, where the intensity of the water from the rise and fall of tides is a form of kinetic energy. Tidal power surrounds gravitational hydropower, which uses the movement of water to push a turbine to generate electricity. The turbines are likened to wind turbines, except they are positioned underwater.
Geothermal power is derived from the Earth’s internal heat. Geothermal energy is
contained in the rock and fluids beneath Earth’s crust. It can be found from shallow
ground to several miles below the surface, and even farther down to the extremely hot molten rock called magma.
These underground reservoirs of steam and hot water can be tapped to generate
electricity or to heat and cool buildings directly.
There are three types of geothermal power plants:
1. dry steam
Dry steam, the oldest geothermal technology, takes steam out of fractures in the
ground and uses it to directly drive a turbine. Flash plants pull deep, high-pressure
hot water into cooler, low-pressure water. The steam that results from this process
is used to drive the turbine. In binary plants, the hot water is passed by a secondary
fluid with a much lower boiling point than water.
Wind is something we experience every day, we breathe air and give air but this cannot we called wind, even though wind is just air but there is a difference. Wind is caused by the uneven heating of the atmosphere by the sun, variations in the earth surface, and rotation of the earth. Mountains, bodies of water, and vegetation all influence wind flow patterns. energy is a form of solar energy. Wind energy (or wind power) describes the process by which wind is used to generate electricity. Wind turbines convert the kinetic energy in the wind into mechanical power. A generator can convert mechanical power into electricity. Wind turbines convert the energy in wind to electricity by rotating propeller-like blades around a rotor. The rotor turns the drive shaft, which turns an electric generator. Three key factors affect the amount of energy a turbine can harness from the wind:
a. wind speed
b. air density
c. Swept area
Hydro means water, so the electricity derived from water is termed as hydro-energy When flowing water is utilized to form all important electricity then the process is called hydroelectric power generation. Hydropower can be defined as a source of renewable energy obtained from flowing water, and is one of the most reliable, technically exploitable, and environmentally friendly renewable energy alternative. Hydroelectric energy is the conversion of hydropower from the running water to electricity. If the initial source of energy is water, then it is referred to as the hydroelectric energy.
Through hydro energy, electricity can be generated by two ways:
1. Flow of water
2. Water storage
Both of these methods require dams. Dam performs two significant tasks for hydroelectric power plant, first task is that it stores enough amount of water which can be utilized when it does not rain and other one is it allows water to fall from the gates of dams called turbines. Therefore dams store water and also produces electricity with flow of water.
why to use renewable energy?
Renewable energy is energy derived from natural resources that replenish themselves in less than a human lifetime without depleting the planet’s resources. These resources such as sunlight, wind, rain, tides, waves, biomass and thermal energy stored in the earth’s crust are available in one form or another nearly everywhere. They are virtually inexhaustible. And, what is even more important, they cause little climate or environmental damage.
Fossil fuels such as oil, coal, and natural gas on the contrary are available in finite quantities only. As we keep extracting them, they will run out sooner or later. Although produced in natural processes, fossil fuels do not replenish as quickly as we
humans use them. Key benefits of renewable energy:
1. Renewable energy emits no or low greenhouse gases. That’s good for the climate.
2. Renewable energy emits no or low air pollutants. That’s better for our health.
3. Renewable energy comes with low costs. That’s good for keeping energy prices at affordable
4. Renewable energy makes the energy system resilient. That’s important to prevent power shortages.
5. Renewable energy is accessible to all. That’s good for development.
win green enrgy
Clean. Renewable. Efficient.