33results about How to "Reduce parasitic power" patented technology

A hydrogen-rich reformate gas generator (36), such as a mini-CPO, POX, ATR or other hydrogen generator provides warm, dry, hydrogen-rich reformate gas to a hydrogen desulfurizer (17) which provides desulfurized feedstock gas to a major reformer (14) (such as a CPO) which, after processing in a water-gas shift reactor (26) and preferential CO oxidizer (27) produces hydrogen-containing reformate in a line (31) for use, for instance, as fuel for a fuel cell power plant. The expensive prior art hydrogen blower (30) is thereby eliminated, thus reducing parasitic power losses in the power plant. The drier reformate provided by the small hydrogen generator to the hydrogen desulfurizer favors hydrogen sulfide adsorption on zinc oxide and helps to reduce sulfur to the parts per billion level.

In a fuel cell for a fuel cell power plant having a PEM (9), a cathode comprising at least a catalyst (10) and a support substrate (17), possibly with a diffusion layer (16), on one side of the PEM, and an anode comprising at least an anode support substrate (14) and an anode catalyst (11) on the opposite side of the PEM, and a porous water transport plate having reactant gas flow field channels (31, 32) (21, 28) adjacent to each of said support substrates as well as water flow channels (22) in at least one of said water transport plates, the thermal conductance of the cathode is less than about one-half of the thermal conductance of the anode, and preferably less than one-quarter of the thermal conductance of the anode, to promote flow of water from the cathode to the anode and to the adjacent water transport plate, obviating the need, in some cases, for water or reactant pressure pumps.

Water flow field inlet manifolds (33, 37) are disposed at the fuel cell stack (11) base. Water flow field outlet manifolds (34, 38) are located at the fuel cell stack top. Outlet and inlet manifolds are interconnected (41-43, 47, 49, 50) so gas bubbles leaking through the porous water transport plate cause flow by natural convection, with no mechanical water pump. Variation in water level within a standpipe (58) controls (56, 60, 62, 63) the temperature or flow of coolant. In another embodiment, the water is not circulated, but gas and excess water are vented from the water outlet manifolds. Water channels (70) may be vertical. A hydrophobic region (80) provides gas leakage to ensure bubble pumping of water. An external heat exchanger (77) maximizes water density differential for convective flow.

Provided are a bipolar plate and a fuel cell stack and a power generation system comprising the bipolar plate, the bipolar plate comprises a first polar plate and a second polar plate, the first polarplate is provided with a first surface and a second surface, the second polar plate is provided with a third surface and a fourth surface, and the first surface of the first polar plate is provided with a first flow channel and a first reference surface; a third flow channel and a third reference surface are arranged on the third surface of the second polar plate; in the bipolar plate, the secondsurface of the first polar plate and the fourth surface of the second polar plate are attached together; the first surface of the first polar plate and the third surface of the second polar plate have different flow fields. And at least two synchronous fluctuating areas are arranged on the bipolar plate and are channels for leading a coolant into and out of the bipolar plate interlayer. And a coolant diversion dike is arranged on the second polar plate and can guide the coolant to flow according to a set route. Due to the characteristics, the bipolar plate has the advantages of good drainageproperty, good cooling effect and the like.

The invention discloses a fuel cell cooling system utilizing phase change cooling. The fuel cell cooling system comprises an electric pile and a cathode air supply module connected to the electric pile and used for supplying the air to the electric pile, and further comprises a cooling liquid circulating module used for cooling the electric pile and preheating the air in the cathode air supply module. The fuel cell cooling system can keep temperature balance in the electric pile, and has the advantages of small cooling flow, small parasitic power of an auxiliary system, waste heat utilization of the cooling liquid and air preheating.

A fuel cell system includes at least one electricity generating element to generate electrical energy through an electrochemical reaction of hydrogen and oxygen, and a reaction source supplier adapted to connect to the electricity generating element and to provide a hydrogen-containing fuel and oxygen-containing air to the electricity generating element. The reaction source supplier includes a first divided region for storing compressed air, a second divided region for storing the fuel, and a storage region having an elastic partition adapted to divide the adjacent first and second divided regions.

The invention discloses a two-stage centrifugal compressor for a fuel cell. The compressor comprises a turbine, a motor, a high-pressure-stage gas compressor, a low-pressure-stage gas compressor, a connecting pipeline and a fuel cell stack, one end of a motor main shaft is connected with a high-pressure impeller, the other end of the motor main shaft is connected with a low-pressure impeller, the connecting pipeline is positioned between a gas outlet of the low-pressure-stage gas compressor and a gas inlet of the high-pressure-stage gas compressor, the gas outlet of the high-pressure-stage gas compressor is connected with a cathode gas inlet of the fuel cell stack, a turbine air inlet is connected with a fuel cell stack cathode air outlet, and a turbine and a high-pressure-stage air compressor are machined into a whole. The turbine drives the high-pressure-stage gas compressor to compress sucked air by utilizing waste gas exhausted by combustion of the fuel cell and transmission of a rotating shaft, the power consumption of the high-pressure-stage gas compressor is reduced, the parasitic power of a fuel cell system is reduced, and the output power of the fuel cell is improved; and the back-to-back integrated machining scheme of the turbine impeller and the high-pressure-stage gas compressor impeller is adopted, the size and the weight of the system are reduced, and the purpose that the system is compact is achieved.

The invention discloses a passenger car fuel cell thermal management system and method. The thermal management system includes a controller, a fuel cell, an inlet temperature sensor, an outlet temperature sensor, a PTC heater, a warm air core, a first water pump, Electric control three-way valve, deionizer, radiator, second water pump and intercooler; the heat management method includes the heat management process in the shutdown mode of the fuel cell, the heat management process in the cold start mode, and the low power operation The thermal management process in the mode and the thermal management process in the high-power working mode. The invention can make the fuel cell start quickly and avoid the failure of the fuel cell cold start.

A fuel cell system having a fuel cell stack (9) employs a group of fuel cells between corresponding cooler plates (55). The system utilizes single phase coolant, the outflow of the coolant plates (55) being divided into a flow (78) just sufficient to provide adequate steam (68, 79) to a fuel reformer (58), the remainder of the coolant outlet flowing (76) directly to heat recovery and utilization apparatus (77), which may include fuel cell power plant accessories (85), such as chillers or boilers.

The invention discloses a fuel cell bipolar plate with an imitation lung multilayer structure and a realization method thereof. The present invention adopts the lung imitation multi-layer structure bipolar plate design, including gas distribution layer, directional blowing layer and drainage layer; the reaction gas enters the gas distribution layer through the air inlet pump, and conducts the gas step by step through the four-stage gas transmission unit. Make the gas enter the gas diffusion layer evenly and with the largest area to participate in the battery reaction, and enhance the uniformity of mass transfer; The mass component compresses the gas into the gas diffusion layer to participate in the electrochemical reaction inside the battery, and the drainage component purges the accumulated water inside the channel. Combined with the designed rectangular flow channel and the inclined bottom surface with an inclination angle β at the bottom of the flow channel, the The discharge of the generated water avoids the blockage of the droplets inside the battery, comprehensively improves the performance of the fuel cell in terms of uniform mass transfer and rapid drainage, and thus improves the overall performance of the fuel cell.

The invention relates to a drain solenoid valve, a fuel cell cold start system and a cold start method. A diaphragm is arranged between the fluid entry channel and the fluid discharge channel of the drain solenoid valve and the valve stem, and the diaphragm prevents the fluid from entering the flow channel and fluid discharge The fluid in the runner enters the sliding gap formed between the valve stem and the valve seat; the cold start system includes a hydrogen bottle, a pressure reducer, a proportional valve, an ejector, a pressure sensor, an electric stack, a hydrogen circulation pump, a water separator, and a drain Gas pipe and controller; the cold start method includes: Step 1: The controller judges whether the fuel cell is below 0°C, and if so, executes Step S2; Step 2: The controller opens the drain solenoid valve and periodically adjusts the hydrogen pressure entering the stack , the controller records the pressure change period T of the pressure sensor, and judges whether to perform a cold start by judging the period T. Compared with the prior art, the cost and complexity are reduced, and the cold start time is reduced.

The invention discloses a steam supply passive type direct methanol fuel cell with catalytic combustion type heat supplying. The steam supply passive type direct methanol fuel cell comprises a cell reaction unit and a porous sintering plate in the cell reaction unit, wherein the cell reaction unit is sequentially connected with a steam supplying unit, a pervaporation membrane, a catalytic combustion heat supplying unit, an oxygen buffering unit, a raw material catalytic combustion unit and a sealing bottom cover. A catalytic combustion method is adopted for supplying heat to the steam supply passive type direct methanol fuel cell, the catalytic combustion has the characteristics of high energy, high efficiency, high reaction rate, and the like, and the reaction is easily controlled, reaction heat energy provides energy for the methanol phase change, high-temperature methanol fuel is provided for cell discharge, and further the output power of the cell is increased; meanwhile, the recycling of a catalytic combustion product ensures that pure methanol can be possibly supplied to cell reaction, and thus the energy density of the cell is greatly increased, and the stable long-term operation of the cell is favorably realized.

The invention discloses a power generation system. The power generation system comprises a fuel cell power generation device, a cathode gas supply module, an anode gas supply module and a tail gas circulation device, wherein the fuel cell power generation device is provided with a gas inlet side, a tail gas side, an anode unit and a cathode unit, the cathode gas supply module is coupled with the cathode unit on the gas inlet side and is used for supplying the first gas required by reaction of the cathode unit, the anode gas supply module is coupled with the anode unit on the gas inlet side andis used for supplying the second gas required by reaction of the anode unit, the tail gas circulation device is coupled with the anode and cathode units on the tail gas side and is coupled with the anode unit on the gas inlet side, the tail gas circulation device is used for receiving the first tail gas exhausted by the anode unit on the tail gas side and the second tail gas exhausted by the cathode unit, and the tail gas circulation device generates power for circulating the first tail gas through the second tail gas, so the first tail gas can flow back to the anode unit.