Why is Renewable Energy?
The use of renewable energy is so important because of the key benefits it provides :
- Renewable energy technologies are clean sources of energy that have a much lower environmental impact than conventional energy technologies.
- Renewable energy will not run out. Ever. Other sources of energy are finite and will some day be depleted.
- Most renewable energy investments and technologies developed are spent on materials and workmanship to build and maintain the facilities to create jobs and fuel local economies.
- Energy security by decrease the dependence on foreign oil and gas fuels.
What is Renewable Energy?
As the International Energy Agency explains:
Renewable energy is derived from natural processes that are replenished constantly. In its various forms, it derives directly from the sun, or from heat generated deep within the earth. Included in the definition is electricity and heat generated from solar, wind, ocean, hydropower, biomass, geothermal resources, and biofuels and hydrogen derived from renewable resources.
In brief of renewable energy are given as below:
- sunlight (solar energy / solar power) : Solar energy, radiant light and heat from the sun, is harnessed using a range of ever-evolving technologies such as solar heating, solar photovoltaics, solar thermal electricity, solar architecture and artificial photosynthesis.
- hydro power : energy in water is harnessed using a range of technologies such as flowing stream of water , or moderate sea swell, (derive kinetic energy from rivers and oceans without the creation of a large reservoir), and energy from large scale dams.
- wind power : Airflows can be used to run wind turbines.
- rain : Each raindrop has an impact energy that is highly dependent on the size of the drop; from a small drizzle drop that has 2 microjoules on impact, to a downpour size drop that carries 1 millijoule of impact energy. It’s identified that a piezoelectric material might be able to capture that energy. Piezoelectric materials generate an electrical potential when acted on by an outside physical force- say a raindrop.
- biofuel : Biofuels include a wide range of fuels which are derived from biomass.
- biomass : Biomass is biological material derived from living, or recently living organisms,
- ethanol fuel: Ethanol fuel is ethanol (ethyl alcohol), the same type of alcohol found in alcoholic beverages. It is most often used as a motor fuel, mainly as a biofuel additive for gasoline.
- tides / tidal power: is a form of hydropower that converts the energy of tides into useful forms of power – mainly electricity.
- waves power: Wave power is the transport of energy by ocean surface waves, and the capture of that energy to do useful work – for example, electricity generation, water desalination, or the pumping of water (into reservoirs).
- geothermal heat: Geothermal energy is from thermal energy generated and stored in the Earth.
Renewable energy replaces conventional fuels in four distinct areas:
- power generation / electricity generation,
- hot water/space heating,
- transport fuels / motor fuels, and
- rural (off-grid) energy services.
The utilization of renewable energy in Indonesia :
Indonesian Government in plenary session with the House of Representatives or DPR-RI (01.28.2014) set a target portion of the use of the 2025 and 2050 are set forth in the points on the Draft Regulation or Rancangan Peraturan Pemerintah (RPP) of the National Energy Policy or Kebijakan Energi nasional.
A regulation plan is centered on the rise in the utilization of renewable energy or energi baru terbarukan (EBT) improved to 23% by 2025 and 31% by 2050.
In addition to renewable energy, the Government and DPR-RI also seeks to:
- reduces dependence on the use of oil from 49% to 25% by 2025 and 20% by 2050,
- the use of coal to 30% by 2025 and 25% by 2050,
- increased the use of natural gas to 22% by 2025 (up 20%) and to 24% by 2050.
To increase the utilization of renewable energy, the Government through the Ministry of Energy and Mineral Resources (ESDM) will boost the development of
- hydropower (PLTA),
- geothermal power plants (PLTP),
- solar power plants (PLTS), and
- biomass power plants (PLTB).
Here’s one of the development plan …
South Sulawesi Build PLTH and PLTS :
South Sulawesi Province is planning to build a number of power plants utilizing renewable energy sources in the four districts to set aside Rp 4.5 billion.
This plan will be realized through the development hydro power plant (PLTH) and solar power plant (PLTS).
This developments will be located at the district where electrification ratio is still low.
Two PLTH, each will be built in the Pinrang district and Luwu with each capacity of 50 KW , in order to provide power 200 households.
References / read more :
- “Renewable energy“, http://en.wikipedia.org/
- “RPP Energi Nasional – Energi Terbarukan Jadi Tumpuan”, Bisnis Indonesia, page 7, 29-Jan-2014.
- “Sumber Energi – Sulses bangun PLTH & PLTS”, Bisnis Indonesia, page 8, 29-Jan-2014.
- “Why is renewable energy important?”, http://www.renewableenergyworld.com/