摘要
构建了全热交换器内部热质传递的数学模型并通过数值模拟手段求解,获得了叉流全热交换器内显热与潜热回收效率。通过与经典实验数据对比证实了模拟方法的可靠性。分析了膜材料的导热性能以及气流通道内部支撑单元导热性能对显热回收效率的影响。结果表明:对典型纸膜或高分子膜强化其导热性能不仅不能提升显热回收效率,反而会因为切向导热增强使得显热回收效率降低。对典型的瓦楞纸或高分子膜材料制作的支撑单元进行导热强化,会使得切向热传导更快,阻碍气流换热,进而导致显热回收效率的降低。
A mathematical model describing the heat and mass transfer processes was established and solved by numerical simulation.The sensible and latent heat recovery efficiencies of a cross flow membrane enthalpy exchanger were predicted.The simulation method was validated by comparing with benchmark experimental data.The effects of membrane and spacer thermal conductivity on the sensible heat recovery efficiency were investigated.The results demonstrate that the sensible heat recovery efficiency can not be improved by enhancing the thermal conductivity of basic polymer or paper membranes.The thermal conduction along the tangential direction decreases the sensible heat recovery efficiency.Enhancing the thermal conductivity of typical corrugated paper or polymer materials results in faster heat conduction along the tangential direction,which hinders the heat transfer between two steams of airs,and accordingly leads to the decreases of the sensible heat recovery efficiency.
作者
闫孝红
陈光
高满芳
王秋旺
YAN Xiao-hong;CHEN Guang;GAO Man-fang;WANG Qiu-wang(Shaanxi Key Laboratory of Energy Chemical Process Intensification,Xi′an Jiaotong University,Xi′an 710049,Shaanxi Province,China;Jiangsu Daxiang Technology Co.,Ltd.,Jingjiang 214500,Jiangsu Province,China;Key Laboratory of Thermo-Fluid Science and Engineering,MOE,Xi′an Jiaotong University,Xi′an 710049,Shaanxi Province,China)
出处
《化学工程》
CAS
CSCD
北大核心
2020年第7期39-43,58,共6页
Chemical Engineering(China)
基金
国家自然科学基金资助项目(51576157)
江苏省靖江市双创计划项目(201807)。
关键词
全热交换器
膜
导热
显热回收
潜热回收
membrane enthalpy exchanger
membrane
thermal conductivity
sensible heat recovery
latent heat recovery
