Why renewable energy and its technologies?
worlds primary energy source are fossil fuels; including oil, coal, gas etc. As
the global energy consumption is growing faster than human population, concerns
are raised in relation to the environmental issues of the earth’s atmosphere.
It has been estimated by the IEA, that fossil fuels can only meet the worlds
energy demand for another couple more decades only (IEA, 2010). It’s been
warned that if the current pace continues, annual weather and climate loss will
reach to an estimate of $150 billion by the next decade (IEA, 2010).
Renewable energy is energy obtained from the natural environment such as
sunlight, wind, rain, waves etc.
As fossil fuels are
being diminishing rapidly, renewable energy sources and its technologies, in
today’s world is the potential and effective solution to especially “long-
standing energy problems faced by the developing countries” (Raza, R). The use
of renewable energy technologies is recognised for its eco-friendly environment, containing no like fossil fuels, creating
CC issues; however, it has its own drawbacks.
According to BP
Statistical Review of World Energy, in the year 2016 the share of renewable
energy consumption includes, solar, wind, geothermal, biomass and ocean energy
was approximately 14% of the total world consumption, while the main fuel
source was from oil, then coal and gas, all which are fossil fuels, with a
total of 83% approximately. The remaining 3% energy is met through hydroelectricity
and nuclear energy. (Figure 4). Oil is the dominant fuel in many of the
continents (Figure 4), making up roughly a third of all energy consumption (BP,
2017), while natural gas dominates in Europe & Eurasia and also Middle East
accounting for 51% of regional energy consumption. Coal is dominated in in Asia
Pacific region, accounting for 49%. The Asian region use fossil fuels as their
main source of energy is because these regions naturally contain fossil
microbes which form fossil fuels.
BP’s data show how
fossil fuels are clearly the backbone of our lives. Accordingly worlds oil
consumption was at 77 million tonnes mtoe, followed by natural gas at 57 mtoe
and renewable energy 53 mtoe. As world energy consumption has increased over
the years (Figure 5), shows how dependent we’ve become ever so dependent upon
these fuels. We use it to heat our homes, run our vehicles, it provides
electricity and also used in agro-industrial environment.
(Figure 4) – BP, 2017 – Consumption by fuel
(Figure 5) – BP, 2017 – Regional
consumption by fuel 2016
renewable energy technologies as “a promising energy alternative”, it provides
clean, safe and unlike fossil fuels, its unlimited. Movement of wind and water,
the rays of the sun can all be transformed as an energy source to supply our
needs in a sustainable way. Each source comes with its own unique technologies,
obviously having its benefits and drawbacks.
Nothing is more
important to the Earth than the Sun; being the largest energy source for life,
therefore it is the ultimate source of renewably energy. Referring to the World
Economic Forum about status and future of solar energy technology, MIT
researchers have quoted “one of the few renewable, low-carbon resources with
both the scalability and the technological maturity to meet ever-growing global
demand for electricity”.
There are numerous
technologies which directly transfer solar energy into a useful form.
Solar Heat Collectors
PV (Photo Voltaic)
collectors are used in nearly 50 million households