The results indicate that the dominant resistance during membrane process comes mainly from evaporation of water on hot side and mass transfer through membrane , and that mass transfer and heat transfers during vmd process are interdependent and interactive ; the results also indicate that the phenomenon of temperature polarization and concentration polarization is inevitable during vmd process 实验结果的分析表明：在vmd过程中，其过程主要阻力来自于热侧汽化和膜内的质量传输；热量传输与质量传输是相互影响、相互制约的；其过程中的浓度极化和温度极化现象是膜蒸馏过程进行时的必然现象。
