| 摘要 |
PROBLEM TO BE SOLVED: To improve water recovery rate, by enabling adequate moisture exchange, even at the end of a bulk hollow fiber membrane which is housed in a housing. SOLUTION: In a humidifier for a fuel cell, a bulk hollow fiber membrane 21b, which is made by tying the water permeable hollow fiber membranes arranged along a longitudinal direction of a housing 21a in a bundle, is housed inside the housing 21a. Off-gas is fed inside the hollow fiber membrane, dry air is fed outside the follow fiber membrane to exchange moisture, and the dry air is humidified. At the center of the housing 21a, a by-pas pipe 21e for dry air is arranged, and the dry air flows in from the inlets 21fa, which are provided on the by-pass pipe 21e to feed inside the by-pass pipe 21e. The dry gas fed inside the by-pass pipe 21e is vented from the outlets 21fb. |
