纳米颗粒对盐梯度太阳池热性能影响的实验研究

Experimental study on the effect of nanoparticles on thermal properties of salt-gradient solar pond

为了增强太阳池的储热温度以及热效率,采用了在太阳池下对流层添加纳米颗粒的方法。通过光照实验与沉降实验选取质量分数为0.010%的碳纳米管溶液添加到太阳池的下对流层,然后与普通盐梯度太阳池进行对比实验,并对实验数据进行分析、计算。实验结果表明:在相同模拟光源下,含纳米颗粒小型太阳池的下对流层平均温度提高了1.7℃,效率是普通太阳池的1.2~1.4倍,由此证明了添加纳米颗粒可以有效提高太阳池的储热温度和热效率;通过对太阳池各层盐浓度的测量,验证了纳米颗粒对太阳池的浓度梯度并未造成明显影响,太阳池的稳定性保持良好。

In order to enhance the heat storage temperature and thermal efficiency of the solar pond, nanoparticles were added to the lower convective zone(LCZ) of the solar pond. The carbon nanotube solution with a mass fraction of 0.010% was selected as the LCZ of the solar pond by light and sedimentation experiments. The experimental data were analyzed and compared with those of ordinary salt gradient solar pond. The results show that under the same simulated light source, the average temperature of the solar pond convective zone containing nanoparticles increases by 1.7 ℃, which is 1.2-1.4 times that of the ordinary solar pond. It is proved that adding nanoparticles can effectively improve the heat storage temperature and thermal efficiency of the solar pond. By measuring the salt concentration in each layer of the solar pond, it is verified that the concentration gradient of the solar pond is not significantly affected by the nanoparticles. The stability of the solar pool remains good.