摘要
建立盐梯度太阳池热盐扩散二维简化数学模型,对1.0 m×1.5 m的太阳池进行数值分析,得出太阳池蓄热过程中的热盐瞬时扩散规律,并与实验值相比较,两者吻合较好。研究结果表明:随着太阳辐射时间的增加,上对流层和下对流层的对流微团数逐渐增多,使得非对流层厚度减小而上下对流层厚度均增加,但在一定时间内盐度梯度造成的密度梯度始终大于温度梯度引起的密度梯度,从而抑制非对流层的对流产生,为实际盐梯度太阳池的运行与维护提供参考依据。
A two-dimensional transient mathematical model is used for the numerical study of the heat and salt diffusion for a 1.0 m× 1.5 m salinity gradient solar pond. The evolution of transient heat and salt diffusion in the salinity gradient solar pond was obtained. It has been found that numerical results are compared with experimental results. Numerical results have clearly shown that the number of convective cells is increased in the UCZ and LCZ with the increase of solar radiation time. The thicknesses of the NCZ decrease and the thicknesses of the UCZ and LCZ increase respectively. However, the density gradient caused by salinity gradient is always higher than that caused by heat gradient in a certain period of time. The convection is prevented in the NCZ, which provides a theoretical supports for the operation and maintenance of the salinity gradient solar pond.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2017年第7期1749-1754,共6页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51406173)
河北省自然科学基金(E2013203173)
关键词
太阳池
双扩散
数值模拟
温度梯度
盐度梯度
solar pond
double-diffusive
numerical study
temperature gradient
salinity gradient
