Cartridge for fuel cell humidifier, and fuel cell humidifier

A humidifier for fuel cells, the humidifier comprising:

• a humidifying module configured to humidify a first gas to be supplied to a fuel cell stack using a second gas;
• a first cap coupled to one end of the humidifying module;
• and
• a second cap coupled to the other end of the humidifying module, wherein
• the humidifying module comprises:
• a mid-case having open opposite ends;
• and
• at least one cartridge received in the mid-case,
• the cartridge comprises:
• an inner case having openings formed at opposite ends;
• and
• a hollow fiber membrane bundle received in the inner case, and
• the hollow fiber membrane bundle comprises a plurality of hollow fiber membranes, the hollow fiber membrane bundle being configured to allow the first gas to flow therethrough at a flow rate of 1 m/s to 10 m/s.

A humidifier for fuel cells, the humidifier comprising:

• a humidifying module configured to humidify a first gas to be supplied to a fuel cell stack using a second gas;
• a first cap coupled to one end of the humidifying module;
• and
• a second cap coupled to the other end of the humidifying module, wherein
• the humidifying module comprises:
• a mid-case having open opposite ends;
• and
• at least one cartridge received in the mid-case,
• the cartridge comprises:
• an inner case having openings formed at opposite ends;
• and
• a hollow fiber membrane bundle received in the inner case, and
• the hollow fiber membrane bundle comprises a plurality of hollow fiber membranes, the hollow fiber membrane bundle being configured to allow the first gas to flow therethrough with a Reynolds number of 50 to 400.