Solid oxide fuel cell system
First Claim
1. A solid oxide fuel cell system comprising a solid oxide fuel cell stack and a gas turbine engine, the solid oxide fuel cell stack comprising at least one solid oxide fuel cell, each solid oxide fuel cell comprising an electrolyte, an anode and a cathode, the gas turbine engine comprising a compressor and a turbine arranged to drive the compressor, the compressor being arranged to supply oxidant to the cathode of the at least one solid oxide fuel cell via an oxidant mixer, wherein the cathode is arranged to supply a first portion of any unused oxidant to a combustor, the anode of the at least one solid oxide fuel cell is arranged to supply a first portion of any unused fuel to the combustor and the combustor is arranged to supply at least a portion of the combustor exhaust gases to the turbine, and wherein the cathode is arranged to supply a second portion of any unused oxidant to the oxidant mixer without passing through the combustor, the oxidant mixer being arranged to supply the second portion of the unused oxidant from the cathode of the at least one solid oxide fuel cell back to the cathode of the at least one solid oxide fuel cell with the oxidant from the compressor, wherein the solid oxide fuel cell system further comprises an additional compressor and an electric motor arranged to drive the additional compressor, the compressor being arranged to supply oxidant to the additional compressor, the additional compressor being arranged to supply oxidant to the oxidant mixer, the solid oxide fuel cell stack being arranged to supply exhaust gases to the turbine, and wherein the oxidant mixer is an oxidant ejector.
4 Assignments
0 Petitions
Accused Products
Abstract
A solid oxide fuel cell system (10) comprises a solid oxide fuel cell stack (12) and a gas turbine engine (14). The solid oxide fuel cell stack (12) comprises a plurality of solid oxide fuel cells (16). The gas turbine engine (14) comprises a compressor (24) and a turbine (26). The compressor (24) supplies oxidant to the cathodes (22) of the fuel cells (16) via an oxidant ejector (60) and the oxidant ejector (60) supplies a portion of the unused oxidant from the cathodes (22) of the fuel cells (16) back to the cathodes (22) of the fuel cells (16) with the oxidant from the compressor (24). The fuel cell system (10) further comprises an additional compressor (64), an electric motor (66) arranged to drive the additional compressor (64), a cooler (70) and a recuperator (72). The compressor (24) supplies oxidant via the cooler (70) to the additional compressor (64) and the additional compressor (64) supplies oxidant to the oxidant ejector (60) via the recuperator (72). The solid oxide fuel cell stack (12) supplies exhaust gases to the turbine (26) and the turbine (26) supplies the exhaust gases through the recuperator (72) to heat the oxidant flowing through the recuperator (72).
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Citations
9 Claims
- 1. A solid oxide fuel cell system comprising a solid oxide fuel cell stack and a gas turbine engine, the solid oxide fuel cell stack comprising at least one solid oxide fuel cell, each solid oxide fuel cell comprising an electrolyte, an anode and a cathode, the gas turbine engine comprising a compressor and a turbine arranged to drive the compressor, the compressor being arranged to supply oxidant to the cathode of the at least one solid oxide fuel cell via an oxidant mixer, wherein the cathode is arranged to supply a first portion of any unused oxidant to a combustor, the anode of the at least one solid oxide fuel cell is arranged to supply a first portion of any unused fuel to the combustor and the combustor is arranged to supply at least a portion of the combustor exhaust gases to the turbine, and wherein the cathode is arranged to supply a second portion of any unused oxidant to the oxidant mixer without passing through the combustor, the oxidant mixer being arranged to supply the second portion of the unused oxidant from the cathode of the at least one solid oxide fuel cell back to the cathode of the at least one solid oxide fuel cell with the oxidant from the compressor, wherein the solid oxide fuel cell system further comprises an additional compressor and an electric motor arranged to drive the additional compressor, the compressor being arranged to supply oxidant to the additional compressor, the additional compressor being arranged to supply oxidant to the oxidant mixer, the solid oxide fuel cell stack being arranged to supply exhaust gases to the turbine, and wherein the oxidant mixer is an oxidant ejector.
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9. A solid oxide fuel cell system comprising a solid oxide fuel cell stack and a gas turbine engine, the solid oxide fuel cell stack comprising at least one solid oxide fuel cell, each solid oxide fuel cell comprising an electrolyte, an anode and a cathode, the gas turbine engine comprising a compressor and a turbine arranged to drive the compressor, the compressor being arranged to supply oxidant to the cathode of the at least one solid oxide fuel cell via an oxidant mixer, the oxidant mixer being arranged to supply a portion of the unused oxidant from the cathode of the at least one solid oxide fuel cell back to the cathode of the at least one solid oxide fuel cell with the oxidant from the compressor through a heat exchanger, wherein the solid oxide fuel cell system further comprises an additional compressor and an electric motor arranged to drive the additional compressor, the compressor being arranged to supply oxidant to the additional compressor, the additional compressor being arranged to supply oxidant to the oxidant mixer and the solid oxide fuel cell stack being arranged to supply exhaust gases to the turbine, wherein the cathode is arranged to supply a portion of the unused oxidant directly into the oxidant mixer without passing through a combustor, and wherein the oxidant mixer is an oxidant ejector.
Specification