地下水人工流场能效增强技术在浅层地热能开发中的应用

摘要

The Sino-Singapore Tianjin Eco-city located in the coastal areas.In this area,the underground water level is high,the underground water is poor fluidity and is salt water in the top 100 m stratum,so the ability of energy transmission ofthe stratum is poor.In a energy supplyperiod,the cool/heat energy transfer from buried pipes cannot be dissipated in a short time,the cold/heat energyaccumulates around the buried pipes,so the energy efficiency of soil source heat pump system is low.The energy efficiency enhancement technique through artificial flow field can make the cold/heat energy transfer from buried pipes dissipated homogeneous,enlarge the temperature differenceofheat transfer,and enhance the energy efficiency of soil source heat pump system.%中新天津生态城地处天津市滨海地区,区内地下水位高,地下水流动性差,地层上部80 ～ 100 m深度内地下水均为咸水,地层天然的热传导能力差,在一个供能期内地埋管向土层中散出的冷量/热量难以在短时间消散,造成冷量/热量在地埋管附近处持续堆积,使地源热泵系统能效降低.地下水人工流场能效增强技术可通过地下水流动将地埋管周围堆积的冷量或热量较为均匀地转移到整个地埋管区域土壤中,使地埋管间的浅层地热能被充分利用,增大换热温差,提高地埋管的换热效率,从而提高地源热泵系统的能效.