Newly installed renewable power capacity in 2017
– says REN21, Renewables 2018 Global Status Report 2018-
with a combined population of 225 million people are committed to reducing emissions by 40% by 2030
-says REN21, Renewables Global Status Report-
forecast of new storage capacity to be deployed worldwide across all sectors through 2020.
-Says Navigant Research, Energy Storage for Renewables Integration-
THE EXPANSION OF RENEWABLES
Fossil fuel is still the major source of energy today, but renewable energies are constantly growing in capacity.
According to the International Energy Agency (IEA), Renewables 2017 publication, renewable electricity capacity is forecasted to expand by over 920 GW, an increase of 43% by 2022 if compared with 2016 data.
Such growth is mostly driven by both policy support and technology progress.
CURRENT OBTACLES TO A COMPLETE ENERGETIC TRANSITION
Fossil fuels allow a stable production of energy, covering all the energy needs at any time.
The nature of renewable energies itself makes the energy production intermittent, being it dependent on sun and wind for example.
Energy for consumption, however, needs to be available at all times without interruptions. This creates the need for storage, so as the energy produced and exceeding the current need of consumption can be accumulated and used when needed.
THE NEED FOR EFFICIENT STORAGE
Many energy storage methods are available.
For long term storage, to turn excess energy production output into hydrogen is considered as a suitable and promising solution, being it free of harmful emissions.
Hydrogen, however, with low energy density, needs to be stored in high pressure tanks or in very big volumes.
This implies issues for safe transportation and handling, making it quite expensive.
Research and development need to explore Hydrogen/energy vectors which allow to overcome such concerns in dealing with Hydrogen itself.
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