一种多级满液蒸发回热式太阳能海水淡化装置的设计

Design of a solar sea-water desalination device with multi-section flooded evaporation and heat recovery

设计了一种多级满液型间接加热蒸发回热式太阳能海水淡化装置。装置中太阳能集热器与蒸发/冷凝部分通过热管联接为一整体,14个集热单元,分为7级;从第2级开始,均采用集热/蒸发/冷凝三位一体的单元,常压运行,不须使用真空泵。使用逐级降温回热法加强蒸汽的气化潜热回收利用,有效地提高了系统制水率和能量利用率。研究表明,在冬季运行工况下,装置的最高单位集热面积制水量为6.16 kg/m2,最大平均回热效率为65.83%。

A multi-stage full liquid type indirect heating and evaporating heat recovery type solar water desalination device is designed, which can effectively connect solar collectors and evaporation /condensation devices through a heat pipe. The device is divided into 7 levels with 14 units. Starting from the second stage, all of the units, in which heat collection/evaporation/condensation are all in one. All of the units are of heat collection/evaporation/condensation in one, working properly without vacuum pump. Thus, the structure is simplified. Moreover,the device uses the step by step cooling and heating method to strengthen the recovery and utilization of the latent heat of vaporization, hence effectively improve the system water rate and energy utilization. In winter,it shows that the maximum freshwater yield of unit heat collection area is 6.16 kg/m^2, and the maximum average efficiency of heat recovery reaches 65.83%.