Cities
Solution by: HOFOR
District Cooling System with Seawater TE C LI M A IT F BENE
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SOCIAL The solution creates a temperate indoor climate, which is more comfortable for occupants.
THE TRIPLE BOTTOM LINE
ENVIRONMENTAL District cooling is free of refrigerants harmful to the environment.
ECONOMIC Customers can save up to 40% on cooling costs when changing to district cooling. 2
Copenhagen, Denmark: This system, assisted by seawater drawn from Copenhagen’s harbor, produces and distributes water for space cooling of commercial and industrial buildings. Copenhagen’s two district cooling facilities distribute and supply cold water to commercial and industrial buildings with large server rooms or where many people work or shop. The district cooling system uses seawater from Copenhagen harbor all year round to cool the pipes carrying water to customers. During the winter months, seawater from the harbor is cold enough to eliminate the need for electricity in the cooling process. In summer, when the temperature of the harbor water exceeds 6 oC, it is still used to increase the efficiency of the other production installations, for example to chill cooling compressors. Apart from being a clean and sustainable source for cooling, the system also takes up less space, and is less noisy, expensive, and energy-intensive than conventional compressor-based air-conditioning.
WHY A SUSTAINIA100 SOLUTION? Most conventional cooling systems use large volumes of electricity, often generated from non-renewable sources, to cool buildings. The district cooling system in Copenhagen provides a sustainable alternative to the status quo. The system can cool 1,900,000 m2 in Copenhagen, and is a step towards making the city CO2 neutral by 2025.1
“We see a tremendous potential in district cooling, because it gives the customers a number of economic and environmental benefits.” HENRIK LORENTSEN BØGESKOV, CEO, HOFOR FJERNKØLING A/S
DEVELOPED IN ... DEPLOYED IN ...
DENMARK
DENMARK
1 Ministry of Foreign Affairs of Denmark. “New District Cooling Plant Makes Copenhagen Greener.” June 2013. Online: www.investindk.com 2
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Kokkegård, H. “Havvand køler københavnske virksomheder.” Danmarks Radio. Sep 2014. Online: www.DR.dk.
SUSTAINIA100
The district cooling facilities in Copenhagen distribute chilled water to buildings after cooling it down in the city harbor.