多孔介质对太阳池热盐扩散影响实验研究

Experimental research on effect of thermal and salt diffusion by installing porous media in solar pond

研究在太阳池底部增设多孔介质水层对太阳池热盐扩散的影响及对水体的传热特性和温度分布的影响.实验结果表明,多孔介质水层可以起到隔热保温作用.测量了石子水层和炉渣水层的热扩散率和导热系数,验证了炉渣水层的隔热保温性比纯水强;通过观测有多孔介质层与无多孔介质层以及不同材质、不同尺寸多孔介质等情况下的盐扩散规律,发现多孔介质层明显抑制了盐的扩散,有利于盐梯度的保持.

The effect of adding porous media layer with water at the bottom of solar pond on the heat-salt diffusion, heat transfer character and temperature distribution of solar pond is researched. Experimental results show that the porous media layer with water can act as heat insulator and preserver. The thermal conductivity and thermal diffusivity of cobble layer with water and slag layer with water are measured, through which the experiment indicates that the thermal insulation performance of slag layer with water is better than that of water. Salt diffusion law with or without porous media layer or with porous media of different materials is discovered. The results show that porous media restrains salt diffusion obviously and is beneficial to keeping salt-gradient.