太阳池底部加设多孔介质实验与模拟研究

摘要

The experimental results prove that cobble can improve temperature of lower convective zone（LCZ） and heat storage quantity of solar pond based on small solar ponds constructed on the seaside,and can avoid augmentation of brine＇s turbidity in the process of adding brine.The effects of porous media on temperature of LCZ,heat storage quantity and maximum thermal extraction efficiency of solar pond are researched based on a finite difference scheme.Computational results show that proper depth of porous media in some soil conditions can significantly increase heat storage quantity and maximum thermal extraction efficiency of solar pond.The effects of ground thermal conductivity on thermal performance of solar pond are also researched.If thermal conductivity of porous media frame is bigger than that of concentrated brine,temperature of LCZ of solar pond increases with increasing porosity of porous media.However,the situation is reverse if thermal conductivity of porous media frame is smaller than that of concentrated brine.%海边小型实验太阳池证明了多孔介质——卵石的加入能够提高太阳池下对流层（LCZ）温度和太阳池贮热量,并有利于保持补盐过程中池水的澄清.利用有限差分方法研究了多孔介质对LCZ温度、太阳池贮热量以及太阳池最大提热率的影响.计算结果表明一定的土壤条件下适当的多孔介质厚度可以提高太阳池的贮热量以及太阳池的最大提热率.还讨论了土壤导热系数对太阳池热性能的影响.当多孔介质骨架导热系数大于浓盐水导热系数时,太阳池LCZ的温度随着多孔介质孔隙率的增大而增大,否则情况相反.