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.

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.