Feasibility Study of Ultrasonic Nebulizer Used in Fuel Cell Humidifier

• Main Authors: Chih-Chien Lin, 林志謙
• Other Authors: Wei-Hsiang Lai
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/13583768829152363732

碩士 === 國立成功大學 === 航空太空工程學系碩博士班 === 97 === The proton conductivity largely depended on the extent of hydration state of the membrane of proton exchange membrane fuel cell(PEMFC), and further affects the fuel cell performance. Typically, sufficient membrane hydration is achieved through the humidification of reactive gases prior to feeding them into the fuel cell. Further, hydrogen humidification has a larger impact on the PEMFC performance than cathode side. Injector humidification has been used to humidify reactive gases. In this study, the experiment used the ultrasonic nebulizer to replace the traditional injector. It has the advantages of small volume, simple system and small droplet production (about 10μm). The study examined the humidifier performance by changing the inlet gas flow rate, inlet gas temperature, and the water temperature in the humidifier. The experimental results showed that changing the water temperature in the humidifier can effectively control the outlet temperature between 23~73℃. The humidifier can supply the near saturated gas (>95%RH) when the inlet gas flow rate between 15~25 slpm.