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Case

District energy

District heating

Smart energy systems

+2

Carlsberg Sustainable Urban Development

23. August 2010
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Solution provider

Ramboll

Ramboll is a leading international engineering, design and consultancy company, owned by the Ramboll Foundation.

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It is the vision of Carlsberg Properties to create a new sustainable district in Copenhagen with housing, shops and office buildings in harmony with the historical old buildings and the neighbouring districts. Fully developed there will be a mix of 77,000 m2 renovated old buildings, 253,000 m2 new commercial buildings and 277,000 m2 new housing.

Carlsberg Properties has focus on sustainability in the planning.

  • Carlsberg shall contribute to a positive social development of Copenhagen
  • Economical resources for the infrastructure and buildings shall be minimized
  • The energy supply shall be independent of fossil fuels in the long term

Therefore the infrastructure is carefully planned with respect to sustainability. Efficient public transport with easy access to Carlsberg S-train station, good conditions for bikes, connection to the integrated low carbon district heating system in Copenhagen supplied by HOFOR and local district cooling supplied by Frederiksberg Forsyning.

Rambøll provided consultancy services for planning of the infrastructure and the sustainable energy. Due to the focus on energy supply, Carlsberg Properties asked Ramboll to analyze the sustainability of the integrated energy supply compared to building level energy supply.

The analysis includes life cycle costs for the supply of heating and electricity taking into account the costs of emissions.

The electricity consumption contributes to the largest CO2 emission as electricity mainly will be produced by fossil fuel condensing plants.

How can Carlsberg generate own electricity based on RES? The analysis shows that the best strategy is to join the Copenhagen Climate Plan and invest in two 4 MW off shore wind turbines. This is several times cheaper than 13,000 small1.5 kW turbines on the roofs or 270,000 m2 of solar cells. Besides it is better for the local environment.

How should Carlsberg provide the heat? Should it be individual ground source heat pumps or district heating? The analysis confirmed that the strategy of Carlsberg to join the Copenhagen Climate Plan, to connect all new buildings to the district heating, is the most sustainable. The total life cycle cost for Denmark, including all the environmental costs, are the lowest with district heating. Also the total costs for the local society of Carlsberg and Copenhagen are much lower. Thereby Carlsberg will support the city of Copenhagen being CO2 neutral in the most cost effective way to the benefit of the other heat consumers.

Roughly half of the buildings will have a significant cooling demand. Ramboll analyzed that district cooling based on a local cooling plant in the district would be much better than individual building level cooling as well as transmission of cooling from the city center. The economical benefit of district cooling for the local community and the society would be around 100 million DKK. Therefore Carlsberg City entered a long-term contract with the Frederiksberg Forsyning,district cooling. Carlsberg city ensures through commercial contracts with all building owners that they connect to the district cooling grid and Frederksberg Forsyning establish the network, the chilled water storage and the district cooling plant. First stage includes cooling only, but the next stage will include a heat pump for combined heating and cooling. This ensures that the benefit of maximal connection to the grid reduces the risk and reduces the cost of cooling for all consumers

The analysis proves that joining the city infrastructure is most sustainable both regarding environment, resources and social responsibility. Besides it will not be necessary with energy facilities at the roofs, which will improve the local environment.

Info at Ramboll profile.

Challenge

Identity and implement the most sustainable energy solutions in the new urban development Carlsberg city.

Solution

Propose feasible solutions for supply of electricity, heating and cooling
analyse which solutions are the most cost effective for the society, for the local community (city) and for the all building owners in the urban development area.
Implement these solutions in co-operation with the local energy utilities
Ensure that all building owners connect to the planned energy infrastructure for heating and cooling and avoid wind turbines on roof tops.

Result

All buildings were connected to the cit-wide district heating system
All buildings which need active cooling are connected to the local district cooling grid in the development
No visible energy installations on roof tops and around buildings