The theoretical analysis of the field synergy is tried to apply to desiccant coated heat exchangers (DCHEs) to clarify its coupled heat and moisture transfer characteristics and the way to enhance the characteristics. In this paper, the heat and moisture transfer model of DFHE is established and verified by comparison with experimental data. Three field synergy angles between temperature gradient, velocity vectorand moisture gradient are introduced and calculated for different types of DFHEs with different air velocities. Through the analysis, the field synergy method is proved available for analysing the coupled heat and mass transfer process of DCHE. Different heat and mass transfer performance index of different structure sizes of DFHEs are analysed. By comparing the sensible heating capacity, dehumidification capacity, Re and field synergy angles of them, the optimization design direction of structure size is obtained. The DFHE with higher ratio between total transfer area and total volume is proved to display better performances. So by optimazing the types of DCHE, DMHE is introduced, and the superiority of DMHE is proved. And the reason why DMHE presents higher heat and mass transfer capacity is illustrated.

试图对场协同效应进行理论分析，以应用于干燥剂涂层换热器（DCHE），以阐明其耦合的传热和水分传递特性以及增强特性的方法。本文建立了DFHE的传热传热模型，并与实验数据进行了比较验证。引入了温度梯度，速度矢量和湿度梯度之间的三个场协同角，并针对不同类型的具有不同风速的DFHE进行了计算。通过分析，证明了场协同方法可用于分析DCHE的传热传质过程。分析了不同结构尺寸的换热器的传热传质性能指标。通过比较显热能力，除湿能力 通过求取它们的场协同角，得到结构尺寸的优化设计方向。事实证明，总转移面积与总体积之比较高的DFHE具有更好的性能。因此，通过优化DCHE的类型，引入了DMHE，并证明了DMHE的优越性。并说明了DMHE具有更高的传热和传质能力的原因。