设计一种由槽式集热器和多级闪蒸装置构成的全天候太阳能海水淡化系统,日均淡水产量为3000 m3。应用上海市的气象数据,引入多级闪蒸简化算法,采用TRNSYS软件进行动态仿真,并利用生命周期成本分析法对设计系统和常规能源淡化系统进行经济性对比。结果表明：太阳能淡化系统的年平均太阳能保证率为41.11%;在整个生命周期中,位于上海市的太阳能淡化系统单位造水成本为18.48 元/m3;当通货膨胀率低于8.5%或天然气价格高于2.09 元/m3时,太阳能淡化系统相较于同等规模的常规能源淡化系统,具有更好的经济性。
Abstract
A full-time solar desalination system composed of the trough solar collector and multi-stage flash device is proposed. The average production of distilled water of this system is 3000 m3 per day. By the simplified algorithm of multi-stage flash process, the dynamic simulation is accomplished by TRNSYS software under the climate of Shanghai. The life cycle cost analysis is adopted to compare the economy between the designed system and a desalination system driven by conventional energy. The results indicate that the average solar fraction per year is 41.11% for the solar desalination system. Throughout the life cycle, the unit desalinated water production cost of the proposed system is 18.48 yuan/m3 in Shanghai. The solar desalination system has better economic performance than the conventional energy desalination system of the same scale, when the inflation rate is under 8.5% or the gas price is beyond 2.09 yuan/m3.
关键词
太阳能 /
海水淡化 /
生命周期 /
多级闪蒸 /
动态仿真
Key words
solar energy /
desalination /
life cycle /
multi-stage flash /
dynamic simulation
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