Energy bunker opens


After six years of planning and construction, the energy bunker has been opened in Hamburg during the International Building Exhibition (IBA). The former flak bunker is equipped with Germany's largest vacuum tube solar energy system and provides regeneratively produced heat for the 4,000 households of the neighbourhood Reiherstieg. However, the 1,350-square-metre solar thermal system on the roof and on the south side of the former flak bunker is not the only source of heat. Additionally, two biomass-fired combined heating and power (CHP) systems as well as the excess heat from a nearby industrial plant are available. To bring production and consumption in line with each other, the energy bunker is equipped with buffer storage, which has a volume of two million litres of water.

The project was implemented by the company Ritter XL Solar, which has so far created large solar thermal plants with a total of over 30,000 square metres. Rolf Meißner, the CEO of the company, hopes the demonstration project will have a signalling effect: "No other form of renewable energy can contribute as effectively and ecologically to the energy supply of cities and municipalities as solar thermal can. In the long run, we hope others will follow our example."

Jan Gesthuizen

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