Humidifier with an integrated water separator for a fuel cell system, fuel cell system including a humidifier, and vehicle including same

Patent metadata

Field	Value
Publication number	US-10693157-B2
Application number	US-201615376509-A
Country	US
Kind code	B2
Filing date	Dec 12, 2016
Priority date	Dec 17, 2015
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

A humidifier with an integrated water separator for a fuel cell system, including a housing with a first channel for a first gas stream and a second channel for a second gas stream, a humidifier area in which the first channel and the second channel are separated from one another by a water vapor-permeable membrane, and a collection container for collecting the deposited liquid water is provided. It is provided that a water separator for separating liquid water is situated in the humidifier area.

First claim

What is claimed is:

1. A humidifier with an integrated water separator for a fuel cell system, comprising:
a housing with a first channel for a first gas stream and with a second channel for a second gas stream;
a humidifier area, the first channel and the second channel being separated from one another in the humidifier area by a water vapor-permeable membrane;
a water separator, situated in the humidifier area in one of the first and second channels to be in contact with the water vapor-permeable membrane separating the first and second channel, for separating liquid water; and
a collection container for collecting the deposited liquid water, the collection container being below the first and second channels and configured such that water trickles down the water separator or the water vapor-permeable membrane into the collection container.

2. The humidifier as recited in claim 1 wherein the water separator is situated in the first channel and is configured in such a way that liquid water from the first gas stream deposits thereon; and the collection container is situated in the humidifier area and is connected to the first channel.

3. The humidifier as recited in claim 1 wherein at least one of the water separator and the water vapor-permeable membrane extends into the collection container.

4. The humidifier as recited in claim 1 wherein the water separator has a wicking effect.

5. The humidifier as recited in claim 1 further comprising wick structures situated in the first channel and extending into the collection container.

6. The humidifier as recited in claim 1 wherein the water separator is designed as at least one of the following: a knitted fabric, a netting, a mesh, a wire mesh, a wire lattice, a perforated sheet, a groove, a generator for generating a turbulent flow, a deflector, a collection pocket for droplet deposition, a labyrinth separator, and a plate separator.

7. The humidifier as recited in claim 1 wherein the membrane is at least one water vapor-permeable hollow fiber situated in the first channel, the first gas stream flowing around the at least one hollow fiber, and the at least one hollow fiber space forming the at least one second channel for the second gas stream.

8. The humidifier as recited in claim 1 wherein the water vapor-permeable membrane is at least one water vapor-permeable plate membrane and the water separator is formed by a coating on the at least one plate membrane.

9. The humidifier as recited in claim 1 wherein the water vapor-permeable membrane is at least one water vapor-permeable plate membrane and the at least one plate membrane is oriented in such a way that the deposited liquid water trickles along the at least one plate membrane into the collection container.

10. The humidifier as recited in claim 1 wherein the collection container has a discharge opening for the deposited liquid water, the discharge opening being designed as an overflow or a controllable discharge valve.

11. The humidifier as recited in claim 1 wherein the first channel includes a first gas supply line and a first gas discharge line situated in an anode or cathode exhaust gas path of a fuel cell system, and the first gas stream is an anode or cathode exhaust gas stream, and the second channel includes a second gas supply line and a second gas discharge line situated in another anode or cathode supply path of the fuel cell system, and the second gas stream is an anode or cathode operating gas stream.

12. A fuel cell system comprising:
a fuel cell stack;
an anode supply with an anode supply path for supplying an anode operating medium to the fuel cell stack, and with an anode exhaust gas path for discharging an anode exhaust gas from the fuel cell stack;
a cathode supply with a cathode supply path for supplying a cathode operating medium to the fuel cell stack, and with a cathode exhaust gas path for discharging a cathode exhaust gas from the fuel cell stack; and
the humidifier as recited in claim 1 and situated in the anode supply or the cathode supply.

13. A vehicle comprising the humidifier as recited in claim 1 .

14. The humidifier as recited in claim 1 wherein the water separator is a knitted fabric.

15. The humidifier as recited in claim 14 wherein the knitted fabric is in connection with a liquid water collection container to wick the water into the knotted fabric.

16. The humidifier as recited in claim 14 wherein the knitted fabric has loops, hollow fibers of the water vapor-permeable membrane passing through the loops.

17. The humidifier as recited in claim 16 wherein the hollow fibers pass through the loops perpendicularly with respect to a plane of the knitted fabric.

18. The humidifier as recited in claim 8 wherein the coating is a hydrophilic coating.

19. The humidifier as recited in claim 8 wherein the coating has vertically extending sections.

20. The humidifier as recited in claim 19 wherein the coating has inclined section inclined with respect to a horizontal and terminating in the vertically extending sections.

Assignees

• Volkswagen Ag
• Audi Ag

Inventors

• Lucas Christian
• Staeck Rune

Classifications

• Y02E60/50

  Fuel cells · CPC title

• Y02T90/40

  Application of hydrogen technology to transportation, e.g. using fuel cells · CPC title

• H01M2008/1095

  Fuel cells with polymeric electrolytes · CPC title

• H01M8/04164

  by condensers, gas-liquid separators or filters · CPC title

• H01M2250/20

  Fuel cells in motive systems, e.g. vehicle, ship, plane · CPC title