论文部分内容阅读
根据地下储能咸水层水文地质特性,以多孔介质传热、传质理论为基础,建立咸水层多场耦合储能模型.以天津市某咸水储能系统为研究对象,探索采用不同盐度溶液回灌模式下含水层热量运移特性及温度场变化规律.经模拟计算得到,采用1∶1混合溶液与去离子水回灌时,粗粉砂层在夏季储热期与次年春季间歇期的热作用半径变化率分别为0.313、-0.016,0.348、-0.04m/d.研究表明,在储能阶段,伴随回灌溶液盐度降低,地下水渗流速度上升,导致对流换热与热弥散效应增强,回灌溶液温度场影响范围、幅度增加;间歇阶段,则由于地下咸水与回灌溶液间盐度梯度变大,在分子扩散作用下含水层渗流溶液热作用半径收缩.
Based on the hydrogeological characteristics of underground storage brackish water, a multi-field coupled storage energy storage model of brackish water is established based on the theory of heat transfer and mass transfer in porous media. Taking a saltwater storage system in Tianjin as the research object, Salinity solution recharge mode of aquifer heat transport characteristics and temperature changes of the law. The simulation results show that the use of 1: 1 mixed solution and deionized water recharge, the coarse silt layer in the summer heat storage period and the following year The change rates of the thermal radius of spring intermittency were 0.313, -0.016, 0.348 and -0.04 m / d, respectively. The results show that during the energy storage stage, with the decrease of salinity of recharge solution and the increase of groundwater seepage velocity, the convective heat transfer and In the intermittent stage, the salinity gradient of aquifer seepage solution shrinks due to the increase of the salinity gradient between the saline water and the recharge solution, due to the enhanced heat dispersion effect and the temperature field of the recharge solution.