摘要
以成都平原某地下水源热泵系统工程为例,模拟该系统夏季运行期间特定水流和热源条件下地下水流-热量耦合运移过程,分析随各因素变化的地下水热量运移过程对热泵系统可持续运行的影响。基于描述地下水热量运移的对流-弥散数值模型,将热泵系统复杂的井群布设及运行方案简化为"对井抽-灌"的理想运行模式,选取夏季运行结束时回灌井地下水热量影响范围及抽水井出水温的变幅作为评价依据,定量评价冷负荷设计、抽-灌水井布设方案及系统工作运行模式等因素变化对地下水热量运移过程的影响,为其可持续运行提供理论参考。模拟结果表明,该地下水源热泵系统在夏季运行时抽-灌水井间将发生热贯通现象,其程度强弱受抽-灌循环水量变化的影响相对明显,宜采取"大温差、小流量"的运行模式.
By taking the groundwater source heat pump(GWHP) system project in Chengdu for a case study,the convection-dispersion numerical model describing the thermal transport in aquifer is established.The groundwater-heat coupled transport processes in aquifer under special groundwater flow and heat source conditions in the summer running period of this GWHP system are simulated.The complex arrangement schemes about pumping and injecting well group are simplified to the ideal operation mode of 'double-well pumping-injecting'.The variations of the heat affected zone of injecting water and the temperature of pumping water at the end of summer running are adopted as the evaluating criterions of sustainable running.And the effects of the heat-load design,pumping-injecting wells arrangement schemes,and system operation modes on groundwater thermal transport processes in aquifer are quantitatively discussed for providing theoretical references for sustainable running of the GWHP system.The results exhibit the occurrence of the heat-penetrating between the pumping and injecting well in summer running,the intensity of which is significantly influenced by the cycling water volume.The operation mode characterized with 'high temperature difference and low flux' is a good choice for this GWHP system.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第S2期297-303,共7页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金资助项目(50579012)
教育部长江学者创新团队资助项目(IRT0717)
教育部留学回国人员科研启动基金资助项目
水文水资源与水利工程科学国家重点实验室开放基金资助项目
关键词
地下水源热泵
可持续运行
地下水热量运移
运行模式
数值模拟
groundwater source heat pump system
sustainable running
groundwater thermal transport
operation mode
numerical simulation
