Local Heating


The combination of innovative technologies reducesCO2 by 95%

Local heat as far as the eye can see: the IBA project “Global Neighbourhood” is the first to benefit from the environmentally friendly heat produced locally. Step by step, the heating grid will be expanded outwards from the bunker by 2015 and will supply 3,000 homes and other heat consumers in the northern Reiherstieg neighbourhood.
It's a heating grid of short distances as the Energy Bunker sits at the centre of the supply area. The short paths and low grid temperatures compared to district heating reduce heat loss and transmission costs. The Energy Bunker is a role model for future heat supply development.

The ‘Renewable Wilhelmsburg’ climate protection concept envisions supplying the district with 100% renewable energy by 2050. One fundamental component of the plan is the three local heating grids, the Energy Bunker (northern Reiherstieg neighbourhood), deep-mined geothermal energy in Wilhelmsburg (south of there, including parts of the industrial and commercial zone in the west of Wilhelmsburg) and Central Wilhelmsburg Energy Cluster.
The Energy Bunker at the centre of a local heating grid is a particularly good example of the potential of a decentralised heat supply system employing specific local energy sources.


Core drilling through the 2 - 4-metre-thick outer walls of the Energy Bunker, 2012

Solar thermal heat and waste heat from thenearby Nordische Oelwerke complement proven technologies such as a CHP plant and a woodchip boiler with local resources. The energy thus gained is combined in the large thermal storage reservoir.
This enables a 95% reduction in CO2 emissions compared to decentralised heat supply with oil and gas boilers.
The dust levels in a large woodchip-fired boiler like the one in the Energy Bunker are many times lower than in decentralised heating with woodchip or pellet boilers.
The electrostatic precipitator in the bunker makes it possible to substantially undershoot applicable thresholds.


Delivery of the chimney, which is over 50 metres high, 2012

Last but not least, the 50 m chimney ensures that the greatly reduced emissions dissipate more easily over the urban space and do not concentrate in particular locations.
Local heat from regenerative energy sources combined with industrial waste heat and buffered in a large thermal storage reservoir - this could be the formula for supplying urban spaces with environmentally friendly heat.

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Assembly of the chimney in 2012