雾化加湿器内热质传递过程数值模拟  

DROPLETS HEAT AND MASS TRANSFER PROCESS NUMERICAL SIMULATION IN ATOMIZING HUMIDIFIER INTERNAL

作　　者：皮骏[1] 赵子竞 原郭丰[3] 吴治永[3] 李兴[3] 

机构地区：[1]中国民航大学中欧航空工程师学院,天津300300 [2]中国民航大学航空工程学院,天津300300 [3]中国科学院太阳能热利用与光伏系统重点实验室,中国科学院电工研究所,北京100190

出　　处：《水处理技术》2015年第1期65-69,共5页Technology of Water Treatment

基　　金：国家自然科学基金项目(51106150);"十二五"国家科技支撑计划(2012BAA05B06);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(ZXH2012H003)

摘　　要：基于DPM离散模型、collision液滴碰撞模型和breakup液滴破碎模型,对雾化加湿器内的液滴雾化及气液两相间的热质耦合传递过程进行仿真模拟;对不同操作条件下加湿器的出口相对湿度、液滴的蒸发量及蒸发率等进行分析。结果表明,初始海水温度对加湿效果影响较小,初始空气速度和温度对加湿性能影响很大。当喷雾质量流量为3.6 kg/h,初始热空气温度为90℃,初始空气速度为4~5 m/s时,加湿器的蒸发率能达到50%以上,加湿器的出口相对湿度能达到80%以上。研究可为新型喷雾加湿除湿海水淡化系统加湿效果的提高奠定理论基础。The atomization field of humidifier, the droplets heat and mass transfer process were simulated with fluent soft packages, based on discrete phase droplet evaporation model, breakup and collision model. The outlet relative-humidity, the mass of evaporation and the evaporation rate were analyzed under different operating conditions. As a result, the initial water temperature had less effect on evaporation compared with the temperature and velocity of humidity air. When the mass flow rate of spray was 3.6 kg/h, the initial hot air temperature 90 ℃, the velocity of air 4-5 m/s, the humidifier evaporation rate could reach more than 50% and the outlet relative-humidity could reach more than 80%. This research will provide a theoretical basis on improving the humidifier performance of spray desalination.

关 键 词：海水淡化 加湿器 传热传质 雾化 蒸发 仿真 

分 类 号：P747.7[天文地球—海洋科学]