The article discusses the historical and contemporary use of seawater for climate control in large buildings, highlighting its efficiency compared to air cooling/heating systems. It explores instances such as the utilization of cool seawater in Cape Town to replace warm air for cooling and heating, and Singapore's district cooling system using seawater's heat capacity for efficient operation. The piece emphasizes the potential for coastal cities worldwide to adopt similar systems, utilizing seawater for district cooling and heating in skyscrapers and central business districts. It outlines technical considerations, like the use of closed-loop pipelines and heat exchangers, and suggests the feasibility of mega-size heat pumps using seawater, offering cost-effective and energy-efficient alternatives to traditional air-based systems. The article concludes by suggesting the adoption of these seawater-based systems as a viable solution for many coastal cities aiming to enhance energy efficiency in climate control for large buildings.
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