Effect of elevated air temperature on shell-and-tube Nafion membrane humidifier in PEMFC system

PEMFC시스템의 공기 공급 온도 변화에 따른 중공사형 나피온 막가습기의 성능특성

Maintaining proper membrane humidity is crucial to ensure optimal operation of a PEMFC system. A gas-to-gas membrane humidifier is popular technology for external humidification of PEMFC reactant gases. Characteristics of heat and water transfer in shell-and-tube Nafion membrane humidifiers has been experimentally investigated for various dry side inlet temperature of membrane humidifier. The results show that heat flux decreases linearly with dry side inlet temperature of membrane humidifier. The water flux through the membrane varies nonlinearly with the temperature elevation.