湿化器内气液两相能量传递与利用的研究  

Study on Energy Transfer and Utilization between Gas-Liquid Two Phases in Humidifier

作　　者：何鸣 张晴 王玉璋[1] HE Ming;ZHANG Qing;WANG Yu-zhang(School of Mechanical Engineering,Shanghai Jiaotong University,Shanghai,China,Post Code:200240)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《热能动力工程》2020年第10期30-36,共7页Journal of Engineering for Thermal Energy and Power

基　　金：国家科技重大专项(2017-I-0009-0010)。

摘　　要：为了精准描述湿空气燃气轮机循环中湿化器内部气液两相间的传热传质过程,建立了湿化器内部理论计算模型,并利用不同工况下实验数据验证了湿化器计算模型的准确性。利用该模型计算得到了湿化器内水气温度、湿度沿湿化器高度方向的分布规律,结合实验数据分析了气液两相间的显热潜热传递及火用值和火用效率的分布情况。结果表明:水与空气间传热传质的推动力大小沿湿化器高度变化,空气在湿化器底部迅速降温,达到饱和状态,此阶段显热传递占据主导地位;进入填料阶段后,随着加湿过程的进行,潜热传递逐渐占据主导地位;火用损失主要集中在底部位置,合理安排进气条件可提升湿化器整体性能。In order to accurately describe heat and mass transfer processes in gas-liquid two-phase in the humidifier in the humid air gas turbine cycle,the theoretical calculation model of the humidifier was established,a nd the experimental data under different operating conditions was used to verify the accuracy of the humidifier calculation model.With this model,the distribution of water and air temperature and humidity in the humidifier along the height of the humidifier was calculated.The experimental data were used to analyze the sensible latent heat transfer between the gas and liquid phases and the distribution of the exergy and exergy efficiency.The results show that the driving force for heat and mass transfer between water and air changes along the height of the humidifier,and the air rapidly cools down to the saturation state at the bottom of the humidifier.The sensible heat transfer plays a dominant role at this stage.After entering the packing stage,with the progress of the humidification process,latent heat transfer gradually dominates.It can be obtained from the distribution of thorium value:exergy loss is mainly concentrated at the bottom position,and reasonable arrangement of intake conditions can improve the overall performance of the humidifier.

关 键 词：湿化器 数学模型 能量传递 传热传质 

分 类 号：TK221[动力工程及工程热物理—动力机械及工程]