Fuel cell-fuel cell hybrid system for energy storage

Patent metadata

Field	Value
Publication number	US-10541433-B2
Application number	US-201715449583-A
Country	US
Kind code	B2
Filing date	Mar 3, 2017
Priority date	Mar 3, 2017
Publication date	Jan 21, 2020
Grant date	Jan 21, 2020

Abstract

An energy storage system for an electrical grid running on a renewable energy source includes a baseload power module, a waste converter module, and a load-following power module. The baseload power module includes a first fuel cell system configured to provide a baseload power to the electrical grid. The waste converter module is configured to extract and store hydrogen from an exhaust stream produced by the first fuel cell system. The load-following power module includes a second fuel cell system configured to receive hydrogen from the waste converter module and convert the hydrogen to electrical energy to support the electrical grid.

First claim

What is claimed is:

1. An energy storage system for an electrical grid running on a renewable energy source comprising:
a baseload power module having a first fuel cell system configured to provide a baseload power to the electrical grid;
a waste converter module configured to extract and store hydrogen from an exhaust stream produced by the first fuel cell system, the waste converter module including a waste converter device comprising at least one of an electrochemical hydrogen separator system or an electrochemical hydrogen compression system; and
a load-following power module having a second fuel cell system configured to receive hydrogen from the waste converter module and convert the hydrogen to electrical energy to support the electrical grid;
wherein the waste converter module is configured to receive excess electricity from the electrical grid; and
wherein the first fuel cell system is configured to receive a waste-derived fuel.

2. The system of claim 1 , wherein the first fuel cell system is a high temperature fuel cell.

3. The system of claim 1 , wherein the second fuel cell system is a low temperature fuel cell.

4. The system of claim 1 , wherein the load-following power module further includes a battery.

5. The system of claim 4 , wherein the battery is configured to receive excess electricity from at least one of the electrical grid, the baseload power module, or the load-following power module.

6. The system of claim 5 , wherein the battery is an electric vehicle battery.

7. The system of claim 1 , wherein the first fuel cell system is further configured to receive waste heat.

8. The system of claim 1 , wherein:
the waste converter device is configured to extract the hydrogen from the exhaust stream; and
the waste converter module further comprises a hydrogen storage device configured to store the extracted hydrogen from the waste converter device.

9. The system of claim 1 , wherein the waste converter device includes the electrochemical hydrogen separator system and the electrochemical hydrogen compression system.

10. The system of claim 1 , further comprising a water electrolyzer configured to receive excess electricity from the electrical grid, wherein the water electrolyzer is configured to provide hydrogen to the load-following power module.

11. An energy storage system comprising:
a high-temperature fuel cell system configured to receive a hydrocarbon-based fuel and output an exhaust stream containing hydrogen;
a waste converter module configured to extract and store the hydrogen contained in the exhaust stream, the waste converter module including a waste converter device comprising at least one of an electrochemical hydrogen separator system or an electrochemical hydrogen compression system; and
a low-temperature fuel cell system configured to receive hydrogen from the waste converter module and convert the received hydrogen to electrical energy;
wherein the electrical energy produced by the low-temperature fuel cell system is configured to supply power support to ancillary services of an electrical grid.

12. The system of claim 11 , further comprising a battery.

13. The system of claim 11 , wherein the high-temperature fuel cell system is configured to provide a baseload power to an electrical grid and the low-temperature fuel cell system is configured to provide a load-following power to the electrical grid.

14. A method for supporting an electrical grid running on a renewable energy source comprising:
providing a hydrocarbon-based fuel to a first fuel cell system;
outputting an exhaust stream produced by the first fuel cell system to a waste converter device;
electrochemically separating or compressing hydrogen from the exhaust stream by the waste converter device;
storing the extracted hydrogen in a hydrogen storage device;
providing the stored hydrogen to a second fuel cell system to produce electrical energy for supporting the electrical grid; and
supplying excess energy produced by the electrical grid running on the renewable energy source to the waste converter device.

15. The method of claim 14 , wherein the first fuel cell system is a high-temperature fuel cell system and the second fuel cell system is a low-temperature fuel cell system.

Assignees

• Fuelcell Energy Inc

Inventors

• Patel Pinakin
• Lipp Ludwig
• Pasquale Nicholas

Classifications

• H01M8/0681

  Reactant purification by the use of electrochemical cells · CPC title

• H02J3/38

  Arrangements for feeding a single network from two or more generators or sources in parallel; Arrangements for feeding already energised networks from additional generators or sources in parallel · CPC title

• H01M8/2495

  of fuel cells of different types · CPC title

• H01M16/00

  Structural combinations of different types of electrochemical generators · CPC title

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title