间接冷凝换热制备淡水的联合海水淡化太阳能烟囱电站初探

A primary exploration of solar chimney power plant combined with seawater desalination by indirect condensation heat exchange fresh water production

文章设计了一种专门用来制备淡水的冷凝器,以及一种间接冷凝换热制备淡水的联合海水淡化太阳能烟囱电站(SCPPSDIC)。以西班牙太阳能烟囱电站的几何参数为基础,对SCPPSDIC系统进行三维建模和数值模拟,并将模拟结果与单一太阳能烟囱电站(SCPP)的模拟结果进行对比分析。研究结果表明:SCPPSDIC的温度场、压力场沿烟囱中轴线呈对称分布,且变化较为平缓;相比于SCPP,SCPPSDIC的输出功率虽有4.2 k W的小幅度下降,但冷凝器区域能够析出3.95 t/h的淡水,淡水产出量极其可观,这使得太阳能综合利用率由1%以下提高到3.43%;冷凝器在制备淡水的同时,所放出的凝结热也会对流入蒸馏池的海水起到预热作用,从而使系统的能量得到充分利用。

The kind of condenser specially used for fresh water production and the solar chimney power plant combined with seawater desalination by indirect condensation heat transfer fresh water production （SCPPSDIC） is designed by our research team. Based on the Spanish solar chimney power plant geometry parameters, a three-dimensional modeling and numerical simulation of SCPPSDIC is carried out, and the numerical simulation results are compared with single solar chimney power plant＇s（SCPP＇s）. The research results shows that the temperature field and pressure field of SCPPSDIC are symmetry distributed along the chimney center axis and the change is more gentle. The output power of SCPPSDIC have a slight decrease of 4.2 kW by contrast to SCPP, but condenser area can produce 3.95 ton/h of fresh water, and a very considerable fresh water output is achieved, which makes the comprehensive utilization of solar energy have improved from less than 1% to 3.43%. The condenser not only achieve fresh water production, but also play an important role in preheating the seawater before flowing into distillation pool to make full use of energy.