摘要
介绍了一种板翅式内冷型除湿器,针对其运行特点建立了其除湿过程的数学模型。分析了除湿过程中除湿器内部溶液与空气的温度场分布以及空气含湿量的分布情况,对内冷除湿与绝热除湿进行了比较,分析了内冷对于溶液温度以及传质驱动势的影响。结果显示与绝热除湿相比内冷除湿可有效抑制溶液温升,但对于传质驱动势的影响并不大,在典型工况下,其溶液出口平均温度比绝热除湿的平均温度低4.83℃,而积分平均湿差仅比绝热除湿时高出0.38 g·kg^(-1),约为3.2%。
A new type of internally cooled dehumidifier based on the plate-fin heat exchanger(PFHE)was designed,the mathematical model of the dehumidification process was established.The temperature and absolute humidity of the air distribution within the dehumidifier was discussed.Effects of internally cooled on solution temperature and mass transfer driving potential was discussed.The results present that the internally cooled dehumidification could effectively inhibit desiccant temperature increasing in dehumidification process,but only have little effect on mass transfer driving potential.In the typical operation condition,the average temperature of solution in internally cooled dehumidifier is 4.83℃lower than that in adiabatic dehumidifier,and integral average moisture difference in internally cooled dehumidifier is 0.38 g·kg^(-1) higher than that in adiabatic dehumidifier.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2008年第S2期123-128,共6页
CIESC Journal
基金
国家自然科学基金项目(50676018)~~
关键词
内冷除湿
数学模型
传热传质
internally dehumidifier
mathematical model
heat and mass transfer
