多孔介质对太阳池传热传质影响的研究

THE INFLUENCE OF POROUS MEDIA ON HEAT AND MASS TRANSFER OF SOLAR POND

通过实验与数值模拟相结合的方法研究在太阳池底部增设多孔介质水层对太阳池热盐双扩散及储热量、稳定性等的影响。在实验室研究了多孔介质对盐扩散的抑制作用。在海边沙滩建造了两个小型太阳池,测量了有无多孔介质太阳池的温度分布和盐度分布并进行数值模拟,模拟值与实验值吻合较好。计算了有无多孔介质太阳池盐梯度的分布、池子稳定性情况以及多孔介质对太阳池的储热量的影响。结果表明,在太阳池底部加设多孔介质水层可以提高太阳池LCZ温度。多孔介质水层有利于提高太阳池的储热量,有利于抑制盐分向上扩散,可以节省太阳池的盐资源消耗,并有利于提高非对流层的盐梯度和稳定性。

The influence of porous media on thermal and salt diffusion, heat storage and stability of solar pond was researched by experimental and numerical approaches in this paper. The inhibitory effect of porous media on salt diffusion was studied. Two mini solar ponds were constructed on the seaside. Temperature and salinity distribution of solar ponds with and without porous media were measured. Numerical simulation of temperature and salinity dis- tribution agreed very well with experimental results. Salt gradient, stability and heat storage of solar pond with and without porous media were calculated. The results show that temperature of lower convective layer can be improved by porous media. Porous media is beneficial to improving heat storage of solar pond. Porous media is favorable to inhibiting salt diffusion which can save salt. Salt gradient and stability of solar pond can be improved by porous media.