摘要
借助数值模拟方法,研究了过热度、闪蒸压力、热水质量流量和闪蒸室热水进口距闪蒸室底部的高度对闪蒸蒸发特性的影响。模拟过程中过热度为5~30℃,闪蒸压力为29.3 k Pa、47.4 k Pa、70.2 k Pa,热水质量流量为18~68 t/h,闪蒸室热水进口距闪蒸室底部的高度为1440~240 mm。结果表明:闪蒸压力一定时,闪蒸效率随过热度的增加呈近似线性的增大;过热度一定时,闪蒸效率随闪蒸压力的升高而增大;闪蒸室热水进口距闪蒸室底部的高度的增加闪蒸效率增大;热水质量流量的变化对闪蒸效率的影响较小。
The influence of superheat, pressure, mass flow rate and height of the flash chamber inlet from the bottom of the flash chamber on evaporation characteristics of flash evaporation was investigated by numerical simulation. The simulations were conducted at superheats from 5 to 30℃, pressures of 29.3, 47.4, 70.2 kPa, mass flow rates from 18 to68 t/h, heights of the flash chamber inlet from the bottom of the flash chamber from 1440 to 240 mm. The results indicated that at a constant pressure, the flash efficiency increased linearly with the increase of superheat. At a constant superheat,the flash efficiency increased with the increase of pressure. The flash efficiency increased with the increase of height of the flash chamber inlet from the bottom of the flash chamber. The mass flow rate had little influence on the flash efficiency.
作者
陈朝
张传
CHEN Chao;ZHANG Chuang(School of Energy and Power Engineering,University of Shanghai for Science and Technology)
出处
《电站系统工程》
2020年第5期25-28,共4页
Power System Engineering
关键词
闪蒸效率
影响因素
数值模拟
flash efficiency
influencing factors
numerical simulation
