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Summary
It is an old idea, but one that is finding renewed relevance in Singapore.
District cooling, a concept dating back more than a century, is gaining ground in the city-state as temperatures rise at twice the global average.
For a country that imports almost all of its energy, the appeal is straightforward: the system uses less electricity than conventional air-conditioning and can be deployed at scale.
Singapore has already laid such networks beneath at least eight districts. The Marina Bay network, which began operations in 2006, remains the world’s largest underground district cooling system.
More buildings are set to be connected there, while separate facilities are also being developed elsewhere by operators such as Keppel EaaS.
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