【摘要】 建立了太阳能制冷海水淡化联产系统物理模型和数学模型,通过改变真空管集热器面积、系统启动温度、海水淡化效数和选择3个不同城市这4个变量,利用MATLAB语言编制程序对系统进行了性能与经济性分析。结果表明:针对大连地区,在其他参数相同的情况下,增加真空管集热器面积,有利于减少辅助热源耗热量和减少海水淡化传热面积,但增大了集热器初投资,综合效果是延长回收期;提高系统启动温度,有利于减少海水淡化传热面积,但增加辅助耗热量,综合效果是延长回收期;增大海水淡化效数,会使海水淡化传热面积增加,但有利于产水、增加淡水效益,综合效果是缩短回收期;三城市的太阳能集热量与辅助耗热量是成反比关系的,大连的辅助耗热量最大,深圳最小;在本文的计算范围内,相比制冷系统,制冷海水淡化联产系统的投资回收期最大可缩短15. 2%。更多还原

【Abstract】 The physical model and mathematical model of solar refrigeration seawater desalination cogeneration system were established. The performance and cost of the system were analyzed by changing the four variables of vacuum tube collector area,system start-up temperature,seawater desalination effects number and three different cities. The results show that increasing the area of vacuum tube collector is beneficial to reduce the heat transfer area of desalination and the heat consumption of auxiliary heat source,but it increases the initial investment of the collector,and the comprehensive effect is to prolong the recovery period. Increasing the start-up temperature of the system is beneficial to reduce the heat transfer area of desalination,but increasing the auxiliary heat consumption and the comprehensive effect is to prolong the recovery period. Increasing the desalination efficiency increases the heat transfer area of desalination,but it will benefit the production of water and increase the benefit of fresh water. The comprehensive effect is to shorten the recovery period. There is an inverse relationship between solar energy collection and auxiliary heat consumption in the three cities. Dalian has the largest auxiliary heat consumption and Shenzhen has the smallest. In the calculation range of this paper,the maximum recovery period of the combined production system can be shortened by 15. 2% compared with the unit cooling system.更多还原