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Why We Need Alternative Energy
Reviews of Alternative Energy Types That Exist in the World is a discussion that is busy being discussed.
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So the review of why we need alternative energy is getting viral and we are interested in making the article.
The following are the results of our research on the advantages and disadvantages of alternative energy in Indonesia.
What is meant by renewable energy?
This is energy that does not run out, but is renewed every time it is almost finished, and the most important thing that sets it apart is clean and environmentally friendly energy.
Because the main source is one of natural resources such as sun, wind and water; They do not leave harmful gases, do not affect the temperature level.
And it has no negative impact on the surrounding environment, and its source is fundamentally different from non-renewable energy sources.
Such as nuclear fuels and natural gas, whose use and dependence for energy leads to carbon dioxide emissions, in addition.
Types of Alternative Energy in the World
Renewable energy is classified according to the source from which it is extracted, and we mention to you the following types:
Vital energy
This energy source is similar to fossil fuels, usually coming from biomass, which is organic material that stores solar radiation and then converts it into chemical energy.
Sources of bioenergy are: wood, manure, agricultural and forestry residues, food crops, herbs and plants, methane gas obtained from landfills, or organic components from industrial and municipal waste; This type of energy is used as a fuel for transportation and electricity production.
Hydroelectric power plant:
This type of energy depends on the exploitation of hydropower and its use in generating electricity. The term “hydroelectricity” refers to electricity and water, and this type of renewable energy is widespread.
The energy produced is very clean energy, and is obtained by completely relying on the potential energy in water – which is called potential energy – and converting it into kinetic energy that produces electrical energy.
Features of using hydropower:
- The water turbine is easy to install and operate.
- The energy produced is very clean and environmentally friendly.
- The capital required to generate this energy is to build a dam or reservoir, which is very useful in regulating and rationalizing irrigation operations.
- Power plants.
- Maintenance is relatively cheap.
Water has been used for centuries as a source of energy. Water is used to pump water and push it to the wheels and move the grain mill. Among the most important forms of exploitation of water energy:
- energy waves.
- Tidal energy.
- Tidal energy.
- irrigation canal.
Wind energy
Wind represents the movement caused by warm air rising upwards and replacing it with cold air; To extract and harness wind energy, wind turbines are used to generate electrical power. This energy can also be used to produce mechanical energy represented by windmills.
It should be noted that about 2% of sunlight is converted into wind energy, and this is a very large amount of energy, and one of the cleanest and most environmentally friendly types of energy.
Wind energy use:
- Move ships and move their sails, and they are completely reliable and a permanent alternative to fossil fuels, because they are always available.
- Wind pump energy is used to pump water and is widely used in Australia, Latin America, Africa and Asia.
- There are new studies and projects to generate electricity from wind energy in homes and farms, at a lower cost than fossil fuel costs.
Solar energy
It is one of the most powerful types of renewable energy, and the rays emitted by the sun and the light and heat it carries are its source.
Human fans have used and utilized it to serve its interests. Solar panels, which are photovoltaic converters that convert sunlight directly into electricity.
It should be noted that humans have exploited this energy since prehistoric times, when monks lit the balance of altars using gold-plated surfaces, and when Ashmides set fire to the Roman fleet in 212 BC, taking advantage of the reflected mirrors he used to shine.
Sunshine and heat on the fleet; In 1988, Weston used thermocouple theory with the aim of converting solar energy into mechanical energy, by generating a voltage between hot and cold points of contact between two dissimilar metals, such as iron and nickel, for example.
Geothermal electricity:
Geothermal energy is extracted from the ground, and has many advantages, the most important of which are:
- high temperature of the extracted water; The greater the depth of the Earth’s interior, the greater the temperature.
- This is one type of energy that is environmentally friendly, clean and renewable.
- To obtain this energy, it is necessary to reach the depths of the Earth’s interior by a distance of up to five kilometers, through a dug pipe.
- It is used to generate electric power.
- Energy can be supplied to the world by harnessing and harnessing it.
The most important heat sources of this energy are:
- Geothermal energy.
- Radioactivity.
- Thermal energy of hot geological rocks.
Sustainable Biofuels:
Among the most sustainable crops in biofuel production are: algae and sugarcane; Biofuels are considered a strong competitor in view of high oil prices and an effective contributor to reducing and moderating oil prices, and have a major role in providing a healthy supply of alternative energy sources.
The energy of two tidal phenomena:
Both tides occur under the influence of the rotation of the Earth on its axis, in addition to the gravitational influence between the Sun and the Moon; This energy is used in many countries to produce electric power.
Because both of these phenomena are exploited by relying on the energy stored in the water during the period of their occurrence, and this occurs through the construction of turbines or dams, with the aim of reducing the resulting pollution. by petroleum or coal by reducing the use of thermal power generation.
What are the benefits of renewable energy?
The benefits of renewable energy vary according to the field of use, and we mention to you some of these benefits:
The benefits of renewable energy in agriculture:
Renewable energy has many uses in agriculture, the most important of which are:
- Solar panels.
- drying agricultural products.
The benefits of renewable energy in the military field:
Renewable energy is used in new military cities, and is used in many ways, the most important of which are:
- Water desalination.
- Utilize field solar heating to supply the unit with hot water.
- Feeds fixed wireless stations.
- Solar heating system for military colleges, to meet the needs of students.
Benefits of renewable energy in industry:
- Cruise line lighting.
- Electric battery charging.
- Local alarms.
- Power plants in remote villages.
- Water distillation and desalination.
- Charges the battery on TVs and wireless booster stations.
The benefits of renewable energy in the field of commercial homes:
Among the most important household uses of solar energy:
- Obtaining hot water for bathing, cleaning and washing, using solar collectors, which is the cheapest form of energy altogether.
- Solar water heating through the use of solar absorbing flats.
What are the disadvantages of renewable energy?
There are many drawbacks to renewable energy, including:
Renewable energy is not completely reliable.
Renewable energy and its technologies depend mainly on weather conditions such as wind and solar; If weather conditions are not fully suitable, renewable energy technologies and mechanisms will not be able to generate electricity efficiently; Among the requirements for renewable energy are:
- Moving the blades of a wind turbine requires a fast gust of wind.
- Hydroelectric power plants require sufficient rainfall to fill the dam in order to supply running water.
- In order for the solar panels to produce the required electricity, the sky must be clear and the sun shining.
Still not free from pollution:
The resources and technology needed to produce renewable energy are built using fossil fuels, which emit carbon dioxide and methane gas; Therefore, it is not completely free from pollution.
Cannot Generate Sufficient Electricity:
Fossil fuels still generate large amounts of electricity compared to the amount of electricity generated by renewable energy technologies; Therefore, it cannot be fully relied on in generating electric power.
The use of renewable energy requires large capital:
Establishment of renewable energy facilities requires huge financial costs, for example: factories that produce solar panels and wind turbines require upfront investment for construction, in addition to relatively high maintenance costs, in addition to the cost of installing power lines to deliver them to target villages and countries.
Advantages and Disadvantages of Alternative Energy in Indonesia
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