Patent
Fuel cell stack cooling system
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TLDR
In this paper, a flow control valve is associated with the coolant heat exchanger to regulate water flow through and/or around the heat exchange depending on the temperature of the water which leaves the steam separator.Abstract:
Fuel Cell stack coolant water is processed by moving the two-phase water/steam coolant exhaust through a steam separator wherein the water phase is separated from the steam phase. The water phase is then moved through a heat exchanger where its temperature is lowered to a subcooled level which is below the coolant operating temperature in the stack. A flow control valve is associated with the coolant heat exchanger to regulate water flow through and/or around the heat exchanger depending on the temperature of the water which leaves the steam separator. By subcooling the coolant before it reenters the stack, a lessening of electrolyte loss through evaporation is achieved. By eliminating steam condensation as a form of system heat rejection, system engineering is simplified and construction costs are lowered.read more
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Novel fuel cell fluid flow field plate
TL;DR: In this article, a fluid flow field plate for use in a solid polymer electrolyte fuel cell is described, which includes a continuous open-faced fluid flow channel which traverses the central area of the plate surface in a serpentine manner.
Patent
Fuel cell gas management system
Abstract: A fuel cell gas management system (10) including a cathode humidification system (30) for transferring latent and sensible heat from an exhaust stream (16) to the cathode inlet stream (14) of the fuel cell (26); and anode humidity retention system (80) for maintaining the total enthalpy of the anode stream (20) exiting the fuel cell equal to the total enthalpy of the anode inlet stream (18); and a cooling water management system (130) having segregated deionized water and cooling water loops interconnected by means of a brazed plate heat exchanger.
Patent
Fuel cell fluid flow field plate
TL;DR: The fluid flow field plates for use in a solid polymer electrolyte fuel cell include in a major surface thereof, multiple continuous open-faced fluid flow channels each of which traverses the central area of the plate surface in a serpentine manner as mentioned in this paper.
Patent
Integrated hydrocarbon reforming system and controls
Lawrence G. Clawson,Matthew H. Dorson,William L. Mitchell,Brian J. Nowicki,Johannes H. J. Thijssen,Robert F. Davis,Christopher Papile,Jennifer W. Rumsey,Nathan Longo,James C. Cross,Vincent G. Rizzo,Gunther Kleeburg,Michael Rindone,Stephen Gustav Block,Maria Sun,Brian D. Morriseau,Mark R. Hagan,Brian J. Bowers +17 more
TL;DR: In this paper, the authors proposed a reformer system with a first reactor configured to generate hydrogen-rich reformate by carrying out at least one of thermal partial oxidation, a catalytic partial oxidation (COPO), a steam reforming, and any combinations thereof.
Patent
Temperature regulating system for a fuel cell powered vehicle
TL;DR: In this article, a temperature regulating system for a fluel cell powered electric motor vehicle assists in maintaining the temperature of the fuel cell stack within a temperature range that provides satisfactory fuel cell performance.
References
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Patent
Method for reducing fuel cell output voltage to permit low power operation
TL;DR: In this article, a portion of the cathode exhaust through the cells and, if necessary, reducing the total air flow to the cells for the purpose of permitting operation below a power level which would otherwise result in excessive voltage.
Patent
Method for producing steam from the liquid in a moist gas stream
Abstract: To avoid using high quality heat to boil water condensed from a moist gas stream and to increase the overall thermal efficiency in a system requiring a supply of steam obtained by boiling water condensed from a moist gas stream, the condensing of the desired amount of water is done in a combined condenser/boiler wherein the condensed out water is separated from the gas stream, reduced in temperature, and throttled to a pressure wherein it is converted to steam back in the condenser/boiler using only the heat of condensation and sensible heat from the moist gas stream during the condensing step.
Patent
Fuel cell system with premixing of water miscible hydrocarbon fuel and water
TL;DR: In this paper, a reformer for developing a fuel process gas from a hydrocarbon fuel-water mixture was employed for a fuel cell system, where the mixture was generated by exclusively delivering a water- miscible hydrocar fuel to a mixing tank when the level of constituents in the mixing tank fell below a first predetermined level.
Patent
Fuel cell controller
TL;DR: In this article, the authors proposed a method to control the cell temperature to predetermined level against the load variation by comparing the temperature of fuel cell with a setting level to obtain the flow and the pressure levels and controlling the pressure in a cooling water tank while increasing or decreasing the rotation of a circulation pump.