Abstract: A power generation system (200) of the present invention comprises a power generation portion (202) configured to generate power, a load power detecting means (205) configured to detect a load power supplied from a power source including the power generation portion to a load, an operation stop determination means (209) configured to stop a power generation operation of the power generation portion based on the load power detected by the load power detecting means and a stop condition; and a stop condition setting means (220) configured to set the stop condition, wherein the stop condition setting means sets different stop conditions in a plurality of time periods, and wherein the operation stop determination means stops the power generation operation of the power generation portion based on each of the different stop conditions set by the stop condition setting means and the load power detected by the load power detecting means.

Abstract: A fuel cell system 100 is configured such that, at start-up, a feed gas is injected to an anode through bypass means 18 and 20 and a controller 36 is configured to cause a material supply switch means to operate based on a value output from the material flow rate meter 40 to stop supply of the feed gas to the anode 11a and to then start the supply of the feed gas to the fuel generator 12.

Abstract: To avoid pressure variation in a cooling water channel, extend a life of an ion exchange resin used to maintain quality of cooling water and reduce power consumption by auxiliary machinery at low cost. There is provided a polymer electrolyte fuel cell, a cooling water tank, a cooling water channel, a cooling water pump, a heat exchanger, a fuel-side condenser and an oxidizer-side condenser that cool exhaust fuel gas and exhaust oxidizer gas discharged from the fuel cell to condense content water vapor, a condensed water tank that stores the water condensed in the fuel-side condenser and the oxidizer-side condenser, a water supply channel having a water supply pump for feeding the condensed water to the cooling water tank, and a water discharge channel for the cooling water tank.

Abstract: A fuel cell generation system, in which an interior of a package is partitioned into a gas path compartment and a non gas compartment with a partition wall, a component through which flammable gas flows is placed within the gas path compartment, a part of the frame member of the package constituting the gas path compartment is provided with gas path compartment inlets, a gas path compartment outlet and a ventilation fan, a component through which the flammable gas does not flows is placed within the non gas compartment, and a part of the frame member of the package of the non gas compartment is provided with a non gas compartment inlet, allowing a blower inlet to open into an interior of the non gas compartment and allowing an air outlet to open into an exterior of the package.

Abstract: A fuel cell system of the present invention comprises a fuel cell (13), a load value detecting means (16) configured to detect a load value of a load of electric power or heat which is generated by equipment (14) supplied with the electric power or the heat from the fuel cell system, a load value storage means (17) configured to store a history of the load value which is detected by the load value detecting means (16), a load value predicting means (18) configured to predict a load value which is going to be generated, based on the history of the load value, and to store the predicted load value as load value data, and scheduled start-up time of a fuel cell (13) is decided based on the load value data.

Abstract: A fuel cell cogeneration system includes a fuel cell, a cooling water heat exchanger provided on a cooling water pathway, a stored hot water pathway through which stored hot water that exchanges heat with cooling water flows, a stored hot water tank, a stored hot water controlling device, a stored hot water temperature measuring device, a stored hot water flow rate adjusting device, a flow rate controlling device of controlling the stored hot water flow rate adjusting device and an exhaust gas heat exchanger of exchanging heat between exhaust gas from fuel processing devices and stored hot water. The flow rate controlling device controls the stored hot water adjusting device to reduce the flow rate of stored hot water flowing through the stored hot water pathway when the temperature of stored hot water is a first predetermined temperature or less during the starting of operation of the fuel cell.

Abstract: A stable and high reliability fuel cell electricity-generating device capable of generating electricity even in the case of sudden drop of load power. A fuel cell generating electric power from a fuel and an oxidizer, a fuel processor producing fuel to be supplied into the fuel cell from an electricity-generating material, a combustion device combusting a residual fuel gas unconsumed in the fuel cell to raise the temperature of the fuel processor, and an electric power generation instructing means of determining the electric power generated by the fuel cell, wherein when the electric power generation instructing means decreases the electric power generated by the fuel cell depending on the decrease of load power to be supplied, the rate at which the generated electric power is decreased is made different depending on the change of the temperature of the fuel processor.

Abstract: A fuel cell system is disclosed a fuel cell configured to generate electric power using an oxidizing gas supplied to a cathode of the fuel cell. In the fuel cell system, a combustible gas is filled and kept in the cathode after stop of power generation, and is thereafter diluted by an incombustible gas when the combustible gas is discharged to atmosphere.

Abstract: A fuel cell system is disclosed, comprising, within a package, a fuel cell stack; a hydrogen-rich gas supply means configured to supply a hydrogen-rich gas; a combustible gas detector configured to detect leakage of a combustible gas which is the hydrogen-rich gas or a raw fuel gas which is a raw material of the hydrogen-rich gas within the package; a combustible gas guide pipe through which the combustible gas is guided into the package; and a controller; wherein the controller is configured to inject the combustible gas intermittently through the combustible gas guide pipe, and to perform a self-diagnostic process as to whether or not the combustible gas detector is functioning properly.

Abstract: A fuel cell power generation system comprises a fuel processor, a fuel cell, a burner configured to heat said fuel processor, a fuel gas passage connected to said fuel processor, said fuel cell, and said burner, a water supply device configured to supply the water to said fuel processor, a material feed device, a purge air supply device configured to supply purge air that purges the fuel gas to said fuel processor, wherein during a stop operation of said fuel cell power generation system, a first purging is performed using a steam in an interior of said fuel processor and an interior of said fuel cell, then, a second purging is performed using humidified air in the interior of said fuel cell, and a third purging is performed using unhumidified air in the interior of said fuel processor.

Abstract: A fuel cell system includes: a fuel cell; a fuel generator for generating a fuel gas from a feedstock; a fuel supplying conduit for supplying the fuel gas produced by the fuel generator to the fuel cell; a fuel exhausting conduit for introducing a remaining fuel gas, which has not been consumed by the fuel cell, to a combustion chamber of the fuel generator; a first bypass conduit for connecting the fuel supplying conduit with the fuel exhausting conduit; a second bypass conduit for supplying the feedstock to the fuel exhausting conduit. The fuel cell system further comprises: either one of (1) a gas pathway switching device A installed at a junction of the fuel supplying conduit and the first bypass conduit; and (2) a gas pathway switching device B installed at a junction of the fuel exhausting conduit and the first bypass conduit.

Abstract: There are provided a fuel cell, a fuel gas supplying unit, an oxidizer gas supplying unit, a state detecting unit of detecting the temperature of the fuel gas supplying unit, an operation controlling unit of detecting abnormalities of predetermined functions performed by the fuel gas supplying unit utilizing the results detected by the state detecting unit and performing operation control in an operation mode corresponding to the contents of abnormalities, and an operation mode switching unit of switching to an operation mode corresponding to the contents of abnormalities.

Abstract: A hydrogen generating part is provided for reacting water and a raw material composed of carbon and hydrogen atoms to generate hydrogen gas, a raw material supply part is provided for supplying a raw material to the hydrogen generating part, a water supply part is provided for supplying water to the hydrogen generating part, a catalyst combustion part is provided, an air supply part is provided for supplying air to the catalyst combustion part, a path switching part is provided for switching raw material supply paths between the raw material supply part and the hydrogen generating part, a bypass path is provided for supplying a raw material to the catalyst combustion part from the path switching part, and a combustion gas path is provided for supplying combustion gas after the catalyst combustion part to the hydrogen generating part. The control part switches the path switching part, and the inside of the hydrogen generating part is replaced with combustion gas after the catalyst combustion part.

Abstract: To provide a fuel cell power generator capable of reliably recognizing ignition and misfire of a burner for heating a fuel gas generator and operating safely, a fuel cell power generator comprising, a fuel gas generator for generating a fuel gas composed mainly of hydrogen from a raw material for power generation and water, a water feeder for feeding water to the fuel gas generator, and a fuel cell for performing power generation using the fuel gas and oxidant gas is provided with: a burner for heating the fuel gas generator by combusting at least one combustion fuel selected from the group consisting of the raw material for power generation, the fuel gas, and an off-gas discharged from a fuel cell; and a flame detector for detecting the state of a flame formed in the burner.

Abstract: A fuel cell system and a method of operating the system capable of increasing the service life of an ion exchange resin used for maintaining the water quality of cooling water and reducing the power consumption of auxiliary equipment at a low cost by avoiding a pressure variation in a cooling water channel; the fuel cell system, comprising a solid high polymer fuel cell (11), a cooling water tank (12), a cooling water channel (13), a cooling water pump (14), a heat exchanger (15), a fuel side condenser (16) and an air side condenser (17) for cooling the exhaust fuel gas and exhaust oxidizer gas exhausted from the fuel cell (11) to condensate the vapor contained therein, a condensed water tank (18) for storing the water condensed by the fuel side condenser (16) and the air side condenser (17), a water feed passage (20) having a water feed pump (19) for feeding the condensed water to the cooling water tank (12) provided therein, and a water drain passage (21) from the cooling water tank (12).

Abstract: The present invention provides a fuel cell power generation system and method, which can realize, at least at one of time periods before start of and after end of power generation, a purging of an atmosphere of a fuel gas flow channel without using nitrogen. Further, it provides a fuel cell power generation system and method, in which a highly dense carbon monoxide can be prevented from flowing into the fuel cell.

Abstract: A fuel cell system includes: a fuel cell; a fuel generator for generating a fuel gas from a feedstock; a fuel supplying conduit for supplying the fuel gas produced by the fuel generator to the fuel cell; a fuel exhausting conduit for introducing a remaining fuel gas, which has not been consumed by the fuel cell, to a combustion chamber of the fuel generator; a first bypass conduit for connecting the fuel supplying conduit with the fuel exhausting conduit; a second bypass conduit for supplying the feedstock to the fuel exhausting conduit. The fuel cell system further comprises: either one of (1) a gas pathway switching device A installed at a junction of the fuel supplying conduit and the first bypass conduit; and (2) a gas pathway switching device B installed at a junction of the fuel exhausting conduit and the first bypass conduit.

Abstract: In accordance with a fuel cell generation system of the present invention, an interior of a package 2 is partitioned into a gas path compartment 3 and a non gas compartment 4 with a partition wall 1, a component through which flammable gas flows is placed within the gas path compartment 3, a part of the frame member of the package 2 constituting the gas path compartment 3 is provided with gas path compartment inlets 12a and 12b, a gas path compartment outlet 13 and a ventilation fan 14, a component through which the flammable gas does not flows is placed within the non gas compartment 4, and a part of the frame member of the package 2 of the non gas compartment 4 is provided with a non gas compartment inlet 20, allowing a blower inlet 21 to open into an interior of the non gas compartment 4 and allowing an air outlet 22 to open into an exterior of the package 2.

Abstract: The present invention provides a fuel cell cogeneration system which can stably supply hot water at high temperature shortly after the system starts to operate.