A multi - stage stacked tray household solar desalination unit with folded base face is designed.The system components includes a heat pipe evacuated tube solar collector and a multi -stage desalination tower. The performance of the unit has been tested under climatic condition, then the variation of distillate yield per 0.5 h, accumulated distillate yield and water temperature with operation time was obtained. The experimental results show that the production rate can reach 9.34 kg/( m2 ·d) under the condition that the accumulative solar radiant energy is 22.46 MJ/( m2· d). The performance coefficient of unit can reach 0.956, which is about 2.7 times as high as the single basin - type solar distiller. The unit that has the advantages of easy use, steady operation and low maintenance is a comparatively ideal domestic solar desalination unit in the remote areas or on the islands where fresh water is in short supply.%设计了一种具有折皱底面的多级迭盘式家用太阳能海水淡化装置.该装置由热管式真空集热管和多级海水淡化器两部分组成.在实际天气条件下,对该装置性能进行了测试,给出了该装置每0.5 h的产水量、累计产水量以及各级水盘的水温随运行时间的变化曲线.实验结果表明,在测试当天累计太阳辐射量22.46 MJ/(m2·d)条件下,该装置产水量可达9.34 kg/(m2·d),单位太阳辐射能产水量为1.50 ks/kWh;该装置的性能系数达到0.956,是传统单级盘式太阳能蒸馏器性能系数的2.7倍.该装置使用简便,运行可靠,维护费用低,在淡水缺乏的岛屿或偏远的咸水湖地区,是一种较为理想的家用太阳能海水淡化装置.
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