Energy storage in blue batteries

Blue batteries energyBlue batteries save energy in water. Here, at Trehørningen energy centre outside Hamar. Photo: Eidsiva Energi

Energy storage in so-called blue batteries

How can blue energy storage (water-based) contribute to lower network lease? And what is a blue battery exactly? These are highlighted at the breakfast meeting «Green effect in blue batteries» at the Arendal week on August 14th.


After a record hot summer, where analysts announce very high electricity prices for the winter, it is time for discussions about alternatives to electrical storage and heating at the annual Arendal week.

– The timing could hardly be better for an event on how smart use of waterborne heating can contribute to lower power bills, says Communications Manager in Norsk Fjernvarme (Norwegian District heating), Trygve Mellvang-Berg.

New phrase: blue battery

At the breakfast meeting, which takes place at Thon Hotel in the centre of Arendal on Tuesday morning, they will hear about how blue batteries can move energy use away from periods of high load on the grid – in a much cheaper way than with conventional battery storage.

– A blue battery stores energy in water-borne systems for both heating and tap water. Think of it as a thermos connected to a heating system – either locally in a house or in a larger system, says General Manager at Norsk Varmepumpeforening (Norwegian Heat Pump Association, NOVAP), Rolf Iver Mytting Hagemoen, who will hold a speech on the subject.

A giant «blue battery» will also be also presented at the meeting. At Furuset in Oslo, Norway’s largest district heating company, Oslo Fortum Varme, plans to save surplus energy from the city in a thermal warehouse in the district for use in winter. The project is part of the research centre of Zero Emison Neighbourhoods in Smart Cities (ZEN).

– This kind of storage to save energy combined with waterborne heating systems can free up space in the power grid for electric car charging – or other necessary electrification says Mellvang-Berg.

Provides savings

It is estimated that at least NOK 140 billion must be used on the power grid by 2025 for necessary maintenance and increased capacity due to electrification. The bill will naturally be footed by the consumers, and not from the revenues.

– The power grid is dimensioned after the power peaks in the wintertime, triggered by electric heating. If we cover the energy needed for heating and tap water in buildings with heat pumps, district heating and bioenergy, this will reduce the investment needs for the grid and ostensibly provide cheaper network lease, says Hagemoen.

A note with concrete examples of the savings waterborne solutions can provide, which is made by the consulting company Enerviva, will be presented at the breakfast meeting.

Besides the three introductions, there will be political debate with Kjetil Kjenseth (Liberals), chairperson of the Energy and Environment Committee in the Norwegian Parliament, Gisle Meininger Saudland (Progress Party), who is member of the Energy and Environment Committee of the Parliament and Andreas Halse (Labour), the Environmental Policy spokesperson for the Oslo Labour Party.

Behind the event are Norwegian District Heating, Pipe Contractors of Norway, NOVAP, the VVS Association and Norsk Bioenergiforening (NoBio)

A detailed program can be found on the event’s Facebook page.


© Norsk Fjernvarme / #Norway Today


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