地下水源热泵能否长久高效运行,核心问题在于地下水的回灌问题。我国经过“十一五”期间可再生能源建筑应用示范项目和“十二五”期间可再生能源建筑应用示范城市和农村示范县的组织实施,已完成超过亿平方米的地下水源热泵示范项目。项目实施过程中,不乏有项目运行几年,出现回灌不畅、回灌不彻底甚至无法回灌的现象。本文为“十二五”国家科技支撑计划项目《浅层地热能集成应用技术与评估及示范》(2011BAJ03B09)的研究成果,以中粗砂地层典型地层为例,从回灌系统设计、回灌井及系统施工、系统维护保养、关键工艺技术提出不同的回灌要求,以确保地下水完成回灌,实现地下水源热泵的长期高效运行。 Groundwater source heat pump can long-term and efficient operation, the core issue is the problem of recharge of groundwater. Our country has passed the “Eleventh Five-Year” period of renewable energy construction demonstration projects and “Twelve-Five ” period of renewable energy construction demonstration cities and rural demonstration counties organization and implementation, has completed more than 100 million square meters of groundwater sources Heat pump demonstration project. During the implementation of the project, there are many projects that have been running for several years, which have resulted in poor returns, incomplete recharging or even non-recharging. This paper is the result of the research on “Integrated Application and Evaluation of Shallow Geothermal Energy” (2011BAJ03B09) of National Science and Technology Support Program of the “Twelfth Five-Year Plan” period. Taking the typical strata of medium-coarse sand formation as an example, Recharge wells and system construction, system maintenance, the key technology put forward different requirements for irrigation to ensure the completion of recharge recharge of groundwater to achieve long-term efficient operation of groundwater source heat pump.