摘要
将雾化强化加湿技术引入加湿除湿海水淡化系统，建立雾滴与热空气之间的质能守恒及热质传递模型，并在相关假设基础，对雾化加湿器内的雾滴蒸发与空气热湿过程进行分析。分析结果显示，当空气和雾滴初始温度分别为90℃及20℃，气液体积比在45×10^3时，直径为100μm的雾滴在1．29s内实现完全蒸发，此时空气相对湿度为78％，而当气液体积比降低至40×10^3时，液滴直径降至36．7μm时达到气液平衡，此时空气相对湿度为100％。空气热湿过程分析结果显示，气液体积比为25×10^3-40×10^3时，出口空气相对湿度均能达到饱和状态，出口空气温度约为35℃，蒸发率可达70％以上。
In this paper, the spray atomization technology was used for the humidification-dehumidification desalination, and the Atomization field of humidifier was simulated based on the conservation of mass and energy between droplets and hot air flow. On the basis of assumptions, the droplets evaporation and the heat and mass transfer process in the humidifier was analyzed. As a consequence, the droplets will achieve completely evaporation in 1.29 seconds when the initial air and droplets temperature are 90 ℃ and 20 ℃, the volume ratio of gas and liguid is 45× 10^3, the diameter of droplet is 100 μm, but the diameter will reduce to 36.7 μm and reach equilibrium when the volume ratio of gas and liguid decreases to 40 ×10^3. Also, the outlet relative-humidity will reach to 100% , outlet humid air temperature is about 35℃and the evaporation can achieve more than 70%, when the volume ratio of gas and liguid is between 25×10^3 and 40×10^3. This result will provide the theoretical basis to improve the humidifier performance of spray desalination.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2016年第5期1352-1358,共7页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51476164
51106150)
广东省引进创新创业团队计划(2013N070)
中央高校基本科研业务费中国民航大学专项(3122013H001)
关键词
雾化蒸发
海水淡化
气液体积比
数值模拟
spry atomization
desalination
gas liquid volume ratio
numerical simulation
