Page 87 - index

rtcc respoNd

solutioNs For

large-scale

eNergY storage

Energy storage is recognized as the key enabler for achieving high penetraton of renewable energy.
A cost-efcient and environmentally friendly technology is now available for commercial roll-out.

the company the efciency and fexibility of renewable energy thus not generally available as
Established in Oslo, Norway, in 2011, EnergyNest systems, and thereby achieve a more reliable a world-wide soluton.
(earlier NEST) is commercializing a new technical and sustainable energy supply. Implementng
soluton for large-scale energy storage. Initally and establishing large-scale energy storage EnergyNest’s soluton
the company focused on thermal storage for solutons is, in the long run, a prerequisite for EnergyNest stores energy in
CSP (Concentrated Solar Power) while it has now reducing and ultmately also phasing out fossil the form of high temperature
heat in a solid state medium.
developed a series of large-scale energy storage fuels from the energy supply mix. The TES (Thermal Energy
solutons with applicatons to a wide specter
of applicatons associated with renewable Current technologies for large-scale energy Storage) uses a special
and conventonal energy producton. With a storage face severe limitatons. Signifcant type of concrete termed
highly qualifed staf the company is actvely advances in performance and cost have been Heatcrete® that is based on
made in chargeable bateries; however, this
readily available but specifc
collaboratng with leading universites and technology is less suited for large-scale storage types of sand and gravel in
research insttutons around the world.
because of cost, safety and environmental combinatons with binding
the storage challenge issues, as well limited life span and cycling compound; this material
Most renewable energy sources, especially capacity. Also molten salt heat storage is has superior thermal and
from solar and wind, are intermitent by limited by lack of fexibility, operatonal mechanical propertes
nature. They produce electricity according to challenges and comparatvely high cost. compared with normal
availability of sun and wind, not governed by Pumped hydro storage (PHS) and compressed structural concretes. In
real-tme demand. Therefore, the ability to store air energy storage (CAES) are atractve connecton with charge and
renewable energy in tmes of excess, and supply solutons but are unfortunately limited by discharge of the storage the
energy when it is in demand, is key for improving geological and topographical conditons and are thermal energy is transported

Figure 1:
Illustraton of a
730 MWh thermal
energy storage.
Approximate
measures are 105
x 25 x 12 meter.

www.rtcc.org 85