JP2005044653A5 - - Google Patents

Claims (7)

A fuel processor that generates fuel gas using raw material gas supplied from an external supply source, a burner for heating the fuel processor, and a fuel gas supplied from the fuel processor are supplied from the outside. A fuel cell that generates power using an oxidant gas, a source gas supply path for supplying source gas from the supply source to the fuel processor, and supply of fuel gas from the fuel processor to the fuel cell A fuel gas supply channel for supplying the unburned gas from the fuel cell to the burner, an unreacted gas supply channel for supplying unreacted gas that was not used in the reaction, the raw material gas supply channel, and the fuel A plurality of valves for conducting / blocking a gas flowing through at least one of the gas supply path and the unreacted gas supply path, and a controller for controlling the opening / closing operation of the plurality of valves,
The control unit, when terminating the operation, closes the valve located upstream in the gas flow direction from a specific position, opens the remaining valves, and after a predetermined time has elapsed, A path formed by the closed valve by temporarily opening a valve located upstream of the valve located downstream of the flow direction in the closed state. When there are a plurality of valves located upstream from the valve located at the most downstream side in the flow direction, the upstream side valve among the plurality of valves The fuel cell system is configured so as to be temporarily opened sequentially. Pressure measuring means for measuring the pressure of the path formed by the closed valve;
The control unit is a valve located upstream from a valve located at the most downstream side in the flow direction among the closed valves when a measured value by the pressure measuring unit becomes a predetermined value or less. The fuel cell system according to claim 1, wherein the fuel cell system is configured to apply an original pressure of the raw material gas to a path formed by the valve in the closed state by temporarily opening the valve. Temperature measuring means for measuring a temperature of a path formed by the closed valve;
The control unit is a valve located upstream from a valve located downstream in the flow direction among the valves that are in the closed state when a value measured by the temperature measurement unit becomes a predetermined value or less. The fuel cell system according to claim 1, wherein the fuel cell system is configured to apply an original pressure of the raw material gas to a path formed by the valve in the closed state by temporarily opening the valve. A desulfurizer for removing sulfur components contained in the raw material gas supplied from an external supplier;
The fuel cell system according to any one of claims 1 to 3, wherein the desulfurizer is disposed upstream of a plurality of valves for conducting / blocking the gas. A fuel processor that generates fuel gas using raw material gas supplied from an external supply source, a burner for heating the fuel processor, and a fuel gas supplied from the fuel processor are supplied from the outside. A fuel cell that generates power using an oxidant gas, a source gas supply path for supplying source gas from the supply source to the fuel processor, and supply of fuel gas from the fuel processor to the fuel cell A fuel gas supply channel for supplying the unburned gas from the fuel cell to the burner, an unreacted gas supply channel for supplying unreacted gas that was not used in the reaction, the raw material gas supply channel, and the fuel A method of operating a fuel cell system comprising a gas supply path and a plurality of valves for conducting / blocking a gas flowing through at least one of the unreacted gas supply paths,
When terminating the operation, closing the valve located upstream in the gas flow direction from a specific position and opening the remaining valves; and
After a predetermined time has elapsed, among the valves that are in the closed state, a valve that is located upstream of the valve that is located in the most downstream direction in the flow direction is temporarily opened to be in the closed state. Applying a source gas source pressure to the path formed by the valve,
In the step of applying the original pressure of the source gas to the path, when there are a plurality of valves located upstream from the valve located at the most downstream side in the flow direction, sequentially from the upstream valve among the plurality of valves. A method for operating a fuel cell system, wherein the fuel cell system is temporarily opened.   The step of applying the source pressure of the raw material gas to the path includes the flow of the valve out of the closed state when the pressure of the path formed by the closed state of the valve becomes a predetermined value or less. 6. A source gas source pressure is applied to a path formed by the closed valve by temporarily opening a valve located upstream of a valve located on the most downstream side in the direction. A method for operating the fuel cell system according to claim 1. The step of applying the source pressure of the source gas to the path includes the flow of the valve out of the closed state when the temperature of the path formed by the valve in the closed state becomes a predetermined value or less. 6. A source gas source pressure is applied to a path formed by the closed valve by temporarily opening a valve located upstream of a valve located on the most downstream side in the direction. A method for operating the fuel cell system according to claim 1.