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以某市相距不远且地下水、岩层结构很接近的2个地下水源热泵系统为研究对象,在夏季对其水井抽、灌流量和水位进行了为期40多天的检测。2个系统运行机制不同,1个为间歇运行、1个为连续运行。将检测数据代入井群地下水流动数学模型,分析得到抽、灌井渗流系数的动态值,进而得到渗流系数值与运行时间的函数关系,作为渗流系数衰减的预测模型。在此基础上,对2个系统长期运行的渗流系数的衰减分别进行了预测。分析结果表明:2个系统运行120天,间歇运行的系统的渗流系数衰减约为14.4%,连续运行的系统的渗流系数则衰减约为39.7%。
Taking the two groundwater source heat pump systems not far away from one another in the city and having close groundwater and rock strata structure as the research object, their well pumping, perfusion and water level were tested over 40 days in summer. Two systems operate differently, one for intermittent operation and one for continuous operation. The test data is substituted into the well group groundwater flow mathematical model, and the dynamic values of seepage and wellbore seepage coefficient are obtained. Then the relationship between the seepage coefficient and the run time is obtained and used as the predictive model of the seepage coefficient attenuation. On this basis, the decay of the seepage coefficient of long-term operation of two systems was predicted respectively. The analysis results show that for two systems running for 120 days, the seepage coefficient decay of intermittent system is about 14.4% and that of continuous system decays about 39.7%.