大深度地下储能海水淡化技术的节能潜力

Energy-saving Capacity of Seawater Desalination via Large Depth Underground Energy Storage

海水淡化作为淡水资源的开源增量技术,已成为解决全球水资源危机的重要途径。近年来,热法和膜法海水淡化技术的应用日益广泛,然而在海水淡化中仍存在着能耗大、运行成本高等突出问题,节能、高效海水淡化技术的研究和应用已受到普遍重视。综述了压缩空气储能发电技术(CAES)、大深度反渗透海水淡化技术(ROID)以及CAES和ROID集成海水淡化技术的发展现状,提出了大深度CAES和ROID集成海水淡化系统的设计方案,并对大深度CAES和ROID集成海水淡化和传统海水淡化系统的能耗进行了对比分析,淡水产量相同时,大深度CAES和ROID集成海水淡化系统的能耗仅为传统海水淡化系统的20%。

As an incremental technology of fresh water resources,seawater desalination has become an important avenue dealing with the global water crisis. In recent years,seawater desalination by thermal method and membrane technology has employed world widely. However,the traditional methods of seawater desalination are still energy consumption and costly in operation.More attention has been paid to development and application of energy-saving and efficient seawater desalination technology. Development of compressed air energy storage technology（ CAES）,reverse osmosis seawater desalination technology in large depth（ ROID）,and integrated CAES and ROID seawater desalination technology were described. The design scheme of a large depth integrated CAES and ROID seawater desalination system was put forward. Energy consumption of the integrated CAES and ROID seawater desalination system and a traditional seawater desalination system were calculated,respectively. With same fresh water production,the energy consumption of the integrated CAES and ROID seawater desalination system accounted for only 20% of traditional seawater desalination system.