This invention reduces fuel requirements for the operations/shutdown of the SOFC system by allowing shut down of the fuel flow first.
Prior solutions require maintaining fuel flow while shutting down the air from first to the fuel cell during shutdown. This leads to a loss of fuel during shutdown of the fuel cell operation.
During the shutdown, air flowing into the combustion chamber can flow into the anode of the fuel cell. A simple way of preventing this is to place check valve between the SOFC anode and the combustion chamber. This check valve will prevent flow of air from the combustion chamber into the anode side of the SOFC.