太阳能聚光光伏-膜蒸馏海水淡化复合系统研究

RESEARCH ON A CONCENTRATING PHOTOVOLTAIC AND MEMBRANE SEAWATER DISTILLATION INTEGRATED SYSTEM

提出一种可在海岛或偏远地区同时产生电力和淡水的聚光光伏-膜蒸馏海水淡化复合系统。对该系统的工作原理以及结构设计进行介绍。对系统的聚光结构进行光学仿真,研究汇聚到太阳电池上的光线接收率及能流密度的均匀性,结果表明,入射角在15°以内时,位置聚光比方差均小于0.8。在实际天气条件下对系统进行实验研究,结果表明,在夏秋季太阳辐照度为800 W/m^(2)的条件下,系统每小时淡水产量可达375.8 g/m^(2),产水效率可达33.1%,每小时平均输出功率可达61.7 W/m^(2),电效率为8.0%,系统整体效率可达41.3%。在冬季条件下,对光伏发电功率和发电效率影响不大,但对装置的产水量有较明显的影响,但产水效率仍可达到26%以上。

A concentrating photovoltaic-membrane seawater distillation integrated system is proposed in the paper,which can be used for electricity and fresh water production in island regions.The working principle and structural design of the system are introduced.Optical simulations are performed to study illumination uniformity and light reception on the solar cells.The results illustrate that within the tilt incident angle of 15°,the maximum variance of local concentration ratio is less than 0.8.The whole-day outdoor experiments are carried out.The results show that under the condition of solar irradiance of 800 W/m^(2) in summer and autumn,the hourly freshwater yield can reach 375.8 g/m^(2) with water yield efficiency of 33.1%,the hourly average output power can be 61.7 W/m^(2) with electricity efficiency of 8.0%.Under the weather conditions in winter,the electrical performance of the system does not change obviously.Although the freshwater yield is lower,the water yield efficiency can still reach more than 26%.