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针对与低温核供热堆相耦合的竖管多效蒸发海水淡化系统 ,建立了物理数学模型 ,探讨该系统的热工水力学特性。采用等温差和分段等面积两种温差分配方案对系统进行设计。分析了系统各效的蒸发器和预热器面积、平均换热系数以及淡水产量等随效数的变化规律。结果表明 ,经过适当的温差调整 ,两种方案下产水比都可以达到 2 0以上 ,但等面积温差分配设计方案在系统的建设上将更具优势。本工作可以为大型竖管多效蒸发海水淡化系统的设计提供理论指导和基础数据
Aiming at the vertical tube multi-effect evaporation seawater desalination system coupled with low-temperature nuclear reactor, a mathematical model was established to study the thermal-hydraulic characteristics of the system. The system is designed by using two kinds of temperature difference distribution schemes such as isothermal difference and section area. The change law of efficiency, such as the area of the evaporator and preheater, the average heat transfer coefficient and the freshwater yield of the system were analyzed. The results show that after proper temperature difference adjustment, the water production ratio can reach more than 20% under both schemes, but the design scheme of temperature difference of equal area will be more advantageous in system construction. This work can provide theoretical guidance and basic data for the design of large standpipe multi-effect evaporation desalination system