【作者】 周彦章； 吴蓉； 黄勇；

【Author】 Yanzhang ZHOU~1,Rong WU~2,Yong HUANG~3 1 Department of Geotechnical Engineering,Nanjing Hydraulic Research Institute,Nanjing Jiangsu,China 2 Wentian College,Hohai University,Maanshan,Anhui,China 3 College of Earth Science and Engineering,Hohai University,Nanjing,Jiangsu,China

【机构】 南京水利科学研究院岩土工程研究所； 河海大学文天学院； 河海大学地球科学与工程学院；

【摘要】 地下水源热泵系统作为一种新型的浅层地热能开发利用形式,饱和介质中地下水热量运移过程规律数值模拟是其工程科学论证及实际应用的重要理论依据。根据理想的"对井抽-灌"水文地质概念模型,建立了描述饱和含水介质中热量输运过程的对流-弥散数学模型,模拟了拟建地下水源热泵系统特定的水流和热源条件下完整运行周期(一年)内饱和介质中地下水热量运移过程。模拟结果表明地下水源热泵系统完整运行周期内地下水热量运移过程具有显著的"阶段性"规律特征,"夏、冬抽-灌输运"和"春、秋停运蓄存"两阶段取决于不同的作用因素。从概念及数学模型两方面讨论了地下水流作用对饱和含水介质中热量输运过程的决定性影响,提出并分析了地下水源热泵系统拟定工作模式中不足之处的解决方案和改进效果,说明不同时期抽、灌井互换工作运行是解决热泵系统拟定工作模式下热(冷)能浪费问题的理想途径。更多还原

【Abstract】 As a new mode of exploitation of the shallow geothermal energy,the numerical simulation of groundwater thermal transport process in saturated aquifer medium was the important theoretical basis of scientific demonstration and practical application for the GWHP(Groundwater Heat Pump)system. According to the ideal hydrogeological conceptual model of the double pumping-injecting program,the numerical convection-dispersion model which described the groundwater thermal transport process in saturated aquifer medium was built.And the groundwater thermal transport process in the whole running cycle(1 year)under special groundwater-flow and heat source conditions of proposed GWHP system was simulated.The results showed that the features of groundwater thermal transport process in the whole running cycle of the GWHP system presented the stage-characteristics obviously.The thermal transport process in the two stages,as pumping-recharging running stage of summer/winter and storing stage of autumn/spring next year,was determined by different factors.Based on the hydrogeological conceptual and numerical model,the conclusive influence of groundwater-flow on the thermal transport process in aquifer was discussed.The solutions and improved results of the defects for the proposed running mode were analyzed.And it indicated that the running mode of pumping and injecting well exchanging was the suitable method to resolve the problem of heat or cold energy wasting of proposed running mode in different running period of GWHP system.更多还原