增湿器作为质子交换膜燃料电池发动机空气子系统的关键部件，起着为电堆阴极入口气体增湿的作用，其性能直接决定了燃料电池系统的性能。通过设计增湿器参数敏感性试验，探究了干、湿两侧入口流量、压力、温度和湿侧入口湿度变化对增湿器性能的影响，并以干侧出口相对湿度、露点接近温度、水转移速率、水回收率作为性能指标进行评价。试验结果表明：提高两侧入口流量会增加水转移速率，干侧出口的湿度降低，露点接近温度升高，水回收率降低；提高两侧入口压力会减小水转移速率，干侧出口的湿度升高，露点接近温度降低，水回收率升高；提高两侧入口温度会增加水转移速率，干侧出口的湿度稳定，露点接近温度升高，水回收率降低；提高湿侧入口湿度会增加水转移速率，干侧出口的湿度升高，露点接近温度和水回收率稳定。

As a key component of the air subsystem of proton exchange membrane fuel cell engines, the humidifier plays a role in humidifying the gas at the cathode inlet of fuel cell stack, and its performance directly determines the performance of battery system. Through the design of humidifier parameter sensitivity experiment, the influences of the inlet flow, pressure, temperature of dry and wet sides and humidity at wet side inlet on the performance of humidifier were explored. The evaluation was conducted based on the performance parameters such as the relative humidity at dry side outlet, dew point approach temperature, water vapour transfer rate and water recovery ratio. The results show that the increase in inlet flow rate of both sides will increase water vapour transfer rate, the humidity at the dry side outlet will decrease, the dew point approach temperature will increase, and the water recovery ratio will decrease. The increase in inlet pressure of both sides will reduce the water vapour transfer rate, the humidity at dry side outlet will increase, the dew point approach temperature will decrease, and the water recovery ratio will increase. The increase in inlet temperature of both sides will increase the water vapour transfer rate, the humidity at dry side outlet will remain stable, the dew point approach temperature will increase, and the water recovery ratio will decrease. The increase in humidity at wet side inlet will increase the water vapour transfer rate, the humidity at dry side outlet will increase, the dew point approach temperature and the water recovery ratio will remain stable.