太阳能驱动的制冷循环海水淡化系统性能分析

Performance analysis of solar powered refrigeration cycle seawater desalination system

建立太阳能驱动的制冷循环海水淡化系统数学模型,通过改变驱动热水流量、驱动热水供回水温差、集热器面积和所在城市这4个变量,进行系统性能分析,利用Matlab语言编制程序进行求解。结果表明:提高驱动热水流量和增大驱动热水供回水温差,均有利于提高淡水产量,但所需辅助热源热量增加,太阳能供能比例下降;增大集热器面积,有利于降低辅助热源热量,增大太阳能供能比例,但淡水产量微降;选择大连、北京和深圳3个城市,在相同的条件下,深圳地区太阳能供能比例最高,北京次之,大连最低。

A mathematical model of a solar powered refrigeration cycle seawater desalination system was established.The system performance was analyzed by changing the four variables of the driving hot water flow rate,the temperature difference between the driving hot water supply and return water,the collector area and city.A program was developed using Matlab language to solve the problem.The results show that increasing the flow rate of the driving hot water and increasing the temperature difference between the supply and return water of the driving hot water are both beneficial for increasing freshwater production,but the required auxiliary heat source heat increases,and the proportion of solar energy supply decreases.Increasing the area of the collector is beneficial for reducing the heat of the auxiliary heat source and increasing the proportion of solar energy supply,but the freshwater production slightly decreases.Dalian,Beijing and Shenzhen are selected.Under the same conditions,Shenzhen has the highest proportion of solar energy supply,followed by Beijing and the lowest in Dalian.