【摘要】 针对舰船发动机排放的烟气具有温度高、热容大的特点,结合闪蒸法和蒸发法海水淡化方法,设计了利用发动机烟气余热的闪蒸-蒸发海水淡化系统。建立了各主要设备的热力计算模型,根据设备之间的连接组合关系以及物流传递关系,建立了海水淡化系统的稳态数学模型,利用序贯模块法顺序求解,可实现系统的稳态模拟。模型中考虑了海水温度变化对系统性能的影响,提高了仿真精度。通过实例研究,获得了海水淡化系统的淡水产量与海水流量、系统压力的关系,研究结果表明该海水淡化系统具有较好的运行性能,可满足中小型船舶对淡水的需求,具有良好的节能效果和经济效益。更多还原

【Abstract】 Considering that ship engine gas had the characteristics of high temperature and heat capacity,we designed a seawater desalination system based on evaporation and flash distillations using ship engine gas as heat source.The thermodynamic model of main equipment was established,the steady-state simulation model of the seawater desalination system was established based on the equipment’s connection relationship and fluid transfer relationship.The mathematical model can be solved by sequential solution using the sequential modular approach,so the steady-state simulation of the seawater desalination system was realized.In order to improving solving accuracy,the influence of fluid’s temperature on fluid’s properties was considered.A case was studied,the relationship between fresh water production and system work pressure,seawater flux was got,the seawater desalination system’s good operating performance was proved,the system can not only meet the demand for fresh water of small and medium size ship,but also has a good energy-saving effect and economic benefits.更多还原