Seasonal storage: options to the option

Jul 3, 2020 04:09 PM ET
  • In an update to a report it released earlier this year, Norway-headquartered consultancy DNV GL laid out the role it sees for both seasonal heat storage as well as pumped hydro to aid take care of the 1.4 TW of variable renewable resource capacity it forecasts to be connected to European electrical power grids by 2050. DNV GL maintains the initial report's verdict that where seasonal storage space is concerned, hydrogen will be the first option.
Seasonal storage: options to the option
Image: Fronius

New understandings released by DNV GL note vital functions for pumped hydro and also warmth storage space on European grids over the next 30 years. In an addendum to a report on seasonal storage space published earlier this year, the working as a consultant keeps in mind that varied strategies will be vital to taking care of the massive 1.4 TW of wind and solar it expects to see on European grids by 2050.

The original report, "The guarantee of seasonal storage space", stated that "pressed hydrogen is the very first practical option for seasonal storage space." The addendum released today stands by this conclusion, yet includes that other modern technologies directly as well as indirectly pertaining to seasonal storage should not be discounted.

DNV GL kept in mind that since releasing the report in March, it had obtained a great deal of remarks slamming the absence of various other technologies, specifically warmth storage and pumped hydro, and claimed that it wished to clarify its setting.

The case study from the initial report, claims DNV GL, took a separated grid without hydropower capability as an example to intensify the results of high variable renewables penetration. It keeps in mind that on most real European grids, various other elements would serve to mitigate the intermittency of wind as well as solar and also decrease the demand for seasonal storage space.

Pumped hydro

DNV GL expects to see 191 GW of hydropower capability operating on European grids in 2050, which will certainly develop chances for pumped hydro storage space to help balance the 891 GW of solar as well as 498 GW of onshore as well as overseas wind that it additionally anticipates for the 2050 European power mix.

Yet much of the available pumped hydro ability will likewise be required for short term storage space, as well as the possibility is restricted. "Even with a continuous electrical power need, this would certainly require substantial (seasonal) storage space capacity, well over the readily available hydropower capability," states DNV GL. "Especially considering that we anticipate that only part of this capability can be made use of for seasonal electricity storage space."

Warm storage

DNV GL's research study is focused on electrical power storage space, and it has actually not taken a look at the impact that seasonal warm storage space may have on general power need. Nonetheless, it keeps in mind that "seasonal storage space of warm will influence the seasonal demand of electricity and indirectly reduce the problem of seasonality on the electricity grid."

And also though the impacts of these alternating innovations should not be discounted when modeling future electric grids, DNV GL keeps that hydrogen will be needed to stabilize variable renewables, particularly in areas like Europe where there are major seasonal distinctions in solar and also wind resources.

" Options like hydropower as well as seasonal warm storage space are absolutely sensible, and all existing versatile resources should be used in the best feasible way," DNV GL states. "By 2050, however, we require extra choices to fit seasonal electrical power load swings and storage space based upon hydrogen appears to end up being an extremely affordable new alternative."

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