A fuel cell system wherein, at the time of activating the fuel cell system, the controller determines whether or not the temperature of the fuel cell detected by the temperature sensor is equal to or less than a temperature corresponding to activation at sub-zero temperatures, and wherein, when the controller determines that the temperature of the fuel cell detected by the temperature sensor is equal to or less than the temperature corresponding to the activation at sub-zero temperatures, the controller sends a command to the fuel gas supplier to supply the fuel gas to the fuel cell, and the controller controls rotation of the circulation pump to stop a flow of the fuel off-gas in the circulation flow path.

A thermal management system for a fuel cell stack is disclosed. The thermal management system comprises at least one cooling channel defined in the fuel cell stack and receives a refrigerant therein, wherein the refrigerant flows through the at least one cooling channel to cool the fuel cell stack. A compressor is in flow communication with an outlet of the at least one cooling channel and compresses the refrigerant received from the at least one cooling channel. A condenser is in flow communication with an outlet of the compressor and discharges heat from the refrigerant received therein. An expansion valve is in flow communication with an outlet of the condenser at its inlet and in flow communication with an inlet of the at least one cooling channel at its outlet and controls a flow of refrigerant from the condenser to the at least one cooling channel is also disclosed.

A geothermal heat extractor includes a heat transfer fluid and a heat transfer fluid supply conduit. The heat transfer fluid is maintained in the supply conduit in a liquid state at a pressure above its saturation pressure. The geothermal heat extractor further includes a heat transfer fluid return conduit, a geothermal heat source coupled thereto, at least one flow control valve configured to control the flow of the heat transfer fluid from the supply conduit to the return conduit, and an external load coupled to the return conduit. As the heat transfer fluid is provided to the return conduit in the liquid state, the heat transfer fluid vaporizes in the return conduit by heat supplied to the return conduit from the geothermal heat source. The vaporized heat transfer fluid is supplied from the return conduit to the external load.

The fuel cell includes an anode chamber having a hydrogen inlet emerging into it. A wall separating the inside of the anode chamber from the outside thereof includes a main region having a first thermal conduction resistance between the outside and the inside of the anode chamber, and a region for promoting the condensation of water having a second thermal conduction resistance between the outside and the inside of the anode chamber strictly smaller than the first thermal conduction resistance so as to delimit a water condensation surface within the anode chamber. A channel for removing the condensed water connects the condensation area to the outside of the anode chamber.

A fuel cell system for supplying anode gas and cathode gas to a fuel cell and causing the fuel cell to generate power according to a load includes a component that circulates discharged gas of either the anode gas or the cathode gas discharged from the fuel cell to the fuel cell. The fuel cell system includes a power generation control unit that controls a power generation state of the fuel cell on the basis of the load, a freezing prediction unit that predicts the freezing of the component on the basis of a temperature of the fuel cell system. The fuel cell system includes an operation execution unit that executes a warm-up operation without stopping the fuel cell system or after the stop of the fuel cell system in the case of receiving a stop command of the fuel cell system when the freezing of the component is predicted.

The invention relates to a system for cooling a fuel cell (10) of a transport vehicle such as an aircraft, comprising: a cooling heat exchanger (30) configured to be able to exchange heat between a loop (20) for cooling the cell and a channel for circulating dynamic air; a device (22, 23) for recovering water produced by said fuel cell; a tank (25) for storing recovered water; a device (50) for spraying water into said dynamic air channel (40) upstream of said heat exchanger (30); and a computer (28) for controlling the amount of sprayed water on the basis of a measurement representing the temperature of said fuel cell (10).

Provided is an integrated structure of an ion filter and a reservoir according to an embodiment of the present disclosure. An integrated structure of an ion filter and a reservoir includes a reservoir storing coolant for cooling a fuel cell stack, an ion filter located inside the reservoir, and a control valve located inside the reservoir to be opened or closed so that the coolant flows into the ion filter, in which the reservoir is divided into a first region in which the ion filter is located by opening or closing the control valve and a second region that is a space other than the first region, and the first region and the second region are connected by an air vent unit through which air passes.

A device for separating a fluid having a water and gas portion in a fuel cell system includes a fluid inlet an a fluid outlet with an outlet valve. The separating device includes a first reservoir region for collecting the water portion of the fluid. The first reservoir region includes a first outlet to feed the water portion in the direction of the fluid outlet. The separating device also includes a second reservoir region having a second outlet that feeds the water portion in the direction of the fluid outlet so that the first reservoir region 19 is connected in series in terms of flow via the second reservoir region with the fluid outlet. In an installation position of the separating device the first outlet is arranged lower than the second outlet so that deposits of the water portion completely covering the first outlet are prevented from flowing away.

In order to protect the temperature of an exhaust stream in an exhaust line, even if the temperature of the exhaust stream discharged from a fuel cell exceeds a temperature during rated operation, a power generation system has: an SOFC; an exhaust air line or an exhaust fuel line, wherein the exhaust air line and exhaust fuel line carry exhaust air and exhaust fuel gas discharged from the SOFC, respectively; a temperature detector for detecting the temperature of the exhaust air or the exhaust fuel gas discharged from the SOFC or the temperature of the exhaust air line or the exhaust fuel line; an exhaust cooling device for cooling the exhaust air in the exhaust air line or the exhaust fuel gas in the exhaust fuel line; and a control device for activating the exhaust cooling device when the temperature detected by the temperature detector exceeds a predetermined temperature.

A fuel cell system including a fuel cell module comprising an anode section configured to output an anode exhaust stream, a first junction configured to split the anode exhaust stream into an anode recycle stream and a system outlet stream, and an ejector. The ejector comprises a low pressure inlet configured to receive a suction stream comprising a first portion of the anode recycle stream, a motive inlet configured to receive a motive stream comprising a second portion of the anode recycle stream, and an outlet configured to output an ejector output stream. The anode section is configured to receive an anode input stream that comprises the ejector output stream.